Background of the Invention Hemorrhage, intravascular thrombosis, and embolism are common clinical manifestations of many diseases (see R. I.

Handin in Harrison's Principles of Internal Medicine (J. D.

Wilson, et al. eds., 12th ed. 1991) New York, McGraw-Hill Book Co. , pp. 348-351). The normal hemostatic system limits blood loss by precisely regulated interactions between components of the vessel wall, circulating blood platelets, and plasma proteins. Unregulated activation of the of the hemostatic system, however, may cause thrombosis, which can reduce blood flow to critical organs like the brain and myocardium.

Physiological systems control the fluidity of blood in mammals (see P. W. Majerus, et al. in Goodman & Gilman's The Pharmacological Basis of Therapeutics (J. G. Hardman & L. E.

Limbird, eds. , 9th ed. 1996) New York, McGraw-Hill Book Co. , pp. 1341-1343). Blood must remain fluid within the vascular systems and yet quickly be able to undergo hemostasis. Hemostasis, or clotting, begins when platelets first adhere to macromolecules in subendothelian regions-of injured and/or damaged blood vessels. These platelets aggregate to form the primary hemostatic plug and stimulate local activation of plasma coagulation factors leading to generation of a fibrin clot that reinforces the aggregated platelets.

Plasma coagulation factors, also referred to as protease zymogens, include factors II, V, VII, VIII, IX, X, XI, and XII. These coagulation factors or protease zymogens are activated by serine proteases leading to coagulation in a so called"coagulation cascade"or chain reaction.

Coagulation or clotting occurs in two ways through different pathways. An intrinsic or contact pathway leads from XII to XIIa to XIa to IXa and to the conversion of X to Xa. Xa with factor Va converts prothrombin (II) to thrombin (IIa) leading to conversion of fibrinogen to fibrin. Polymerization of fibrin leads to a fibrin clot.

An extrinsic pathway is initiated by the conversion of coagulation factor VII to VIIa by Xa. Factor VIIa, a plasma protease, is exposed to, and combines with its essential cofactor tissue factor (TF) which resides constitutively beneath the endothelium. The resulting factor VIIa/TF complex proteolytically activates its substrates, factors IX and X, triggering a cascade of reactions that leads to the generation of thrombin and a fibrin clot as described above.

While clotting as a result of an injury to a blood vessel is a critical physiological process for mammals, clotting can also lead to disease states. A pathological process called thrombosis results when platelet aggregation and/or a fibrin clot blocks (i. e. , occludes) a blood vessel. Arterial thrombosis may result in ischemic necrosis of the tissue supplied by the artery. When the thrombosis occurs in a coronary artery, a myocardial infarction or heart attack can result. A thrombosis occurring in a vein may cause tissues drained by the vein to become edematous and inflamed. Thrombosis of a deep vein may be complicated by a pulmonary embolism.

Preventing or treating clots in a blood vessel may be therapeutically useful by inhibiting formation of blood platelet aggregates, inhibiting formation of fibrin, inhibiting thrombus formation, inhibiting embolus formation, and for treating or preventing unstable angina, refractory angina, myocardial infarction, transient ischemic attacks, atrial fibrillation, thrombotic stroke, embolic stroke, deep vein thrombosis, disseminated intravascular coagulation, ocular build up of fibrin, and reocclusion or restenosis of recanalized vessels.

In order to treat such conditions, researchers have sought to discover chemical compounds that efficaciously and selectively control the clotting process. In addition, such compounds may provide a better understanding of the pathways involved in the coagulation process.

Thus far, the compounds that have been discovered often possess a polar or basic functional group which is integrally responsible for the desired biological activity.

Frequently, this polar functional group is a nitrogen atom of, for example, a guanidine, alkyl-amidine or aryl-amidine group. Because these functionalities are highly basic, they remain protonated at physiologically relevant pH's.

The ionic nature of such protonated species hinders their permeability across lipophilic membranes, which can reduce bioavailability when the pharmaceutical agent is . administered orally.

In order to circumvent such a problem, it is often advantageous to perform a derivatization or chemical modification of the polar functionality such that the pharmaceutical agent becomes neutrally charged and more lipophilic, thereby facilitating absorption of the drug.

However, for the derivatization to be useful, the derivatization must be bioconvertable at the target site or sites of desired pharmacological activity and cleaved under normal physiological conditions to yield the biologically active drug. The term"prodrug"has been used to denote such a chemically modified intermediate.

Summary of the Invention Among the several aspects of the present invention, therefore, is the provision of prodrug compounds useful for selective inhibition of certain enzymes that act upon the coagulation cascade thereby preventing and treating thrombotic conditions in mammals. Generally speaking, these prodrug compounds undergo hydrolysis, oxidation, reduction or elimination at a derivatized amidine group to yield the active compound.

Briefly, therefore, the present invention is directed to the prodrug compound, per se, to pharmaceutical compositions comprising the prodrug compound and a pharmaceutically acceptable carrier, and to methods of use.

One aspect of the invention provides compounds that correspond to formula (I): wherein X comprises a 5-or 6-membered heterocyclic or aromatic ring, the ring atoms being Xi, X2, X3, X4, and Xs for 5-membered heterocyclic rings and X1, X2, X3, X4l X5 and X6 for 6-membered heterocyclic or aromatic rings, wherein X2 is alpha to each of Xi and X3, X3 is alpha to each of X2 and X4, X4 is alpha to each of X3 and X5, Xs is alpha to X4 and alpha to Xi if X is a 5-membered ring or to X6 if X is a 6- membered ring, and X6, when present, is alpha to each of Dz and X5, wherein Xi, X2, X3, X4, X5 and X6 are carbon, nitrogen, oxygen or sulfur ;.

Ll, L3 and L4 are linkages through which Z1, Z3, and Z4, respectively, are covalently bonded to different ring atoms of the 5-or 6-membered heterocyclic or aromatic ring of X, wherein Z1 is covalently bonded to X1, Z3 is covalently bonded to X3, and Z4 is covalently bonded to X4, each of Ll, L3 and L4 independently being a covalent bond or comprising one or more atoms through which Z1, Z3, and Z4 are covalently bonded to XI, X3 and X4, respectively; Z1 is hydrocarbyl or substituted hydrocarbyl; comprises a 5-or 6-membered heterocyclic or aromatic ring substituted with a derivatized amidine which, upon hydrolysis, oxidation, reduction or elimination yields an amidine group, and optionally further substituted with a halogen or hydroxy, the ring atoms of the 5-or 6-membered heterocyclic or aromatic ring of Z3 being carbon, sulfur, nitrogen, or oxygen; Z4 comprises a 5-or 6-membered heterocyclic or carbocyclic ring having two substituents, R42 and R44, and two ring atoms each of which is in the beta position relative to the ring atom of Z4 through which Z4 is covalently bonded to X, wherein one of R42 and R44 is covalently bonded to one of said beta positions and the other of R42 and R44 is covalently bonded to the other of said beta positions, the ring atoms of the 5-or 6-membered heterocyclic or carbocyclic ring of Z4 being carbon, nitrogen, oxygen, or sulfur; R42 is amino; and R44 is selected from the group consisting of hydrogen, hydrocarbyl, substituted hydrocarbyl, heterocyclo, halogen, or an optionally substituted heteroatom selected from nitrogen, oxygen, sulfur and phosphorus; provided, however, the derivatized amidine is other than amidine derivatized with t-butoxycarbonyl.

Another aspect of the invention provides compounds corresponding to formula II: wherein: each of Xi, X2, X3, X4, Xs and X6 is carbon or nitrogen; X2 is a hydrogen bond acceptor; Xg is a direct bond or- (CHz) m- where m is 1 to 5; R42 and R44 are as defined for formula (I); and Z1, Z3, and Z4 are as defined for formula (I).

Other aspects and features of this invention will be in part apparent and in part pointed out hereafter.

Abbreviations and Definitions The term"elimination"is generally meant to encompass any one or more of the following reactions: (1) a reaction that results in a compound fragmenting into two or more compounds; and (2) a reaction that results in one or more groups being removed from a compound without being replaced by other groups.

The term"oxidation"is generally meant to encompass any one or more of the following reactions: (1) a reaction that results in an increase in the oxidation number of an atom in a compound, whether the atom is uncharged or charged and whether free or covalently bound; (2) a reaction that results in the loss of hydrogen from a compound; (3) a reaction that results in the loss or removal of one or more electrons from a compound, with or without concomitant loss or removal of a proton or protons; (4) the action or process of reacting a compound with oxygen; and (5) a reaction that results in the addition of one or more oxygen atoms to a compound.

The term"reduction"is generally meant to encompass any one or more of the following reactions: (1) any reaction which results in a decrease in the oxidation number of an atom in a compound; and (2) any reaction that results in oxygen being withdrawn from, hydrogen being added to, or an electron being added to (with or without the addition of a proton) a compound.

The term"hydrolysis"is generally meant to encompass any one or more of the following reactions: (1) any reaction which results in the addition of a nucleophile to a compound to form a new bond with concurrent loss of a group from the compound; (2) any reaction which results in the addition of water to a compound; and (3) any reaction that results in the rupture of one or more chemical bonds by reaction with, and involving the addition of, the elements of water.

The term"physiological conditions"are those conditions characteristic to an organism's (to a human beings) healthy or normal functioning.

The terms"hydrocarbon"and"hydrocarbyl"as used herein describe organic compounds or radicals consisting exclusively of the elements carbon and hydrogen. These moieties include alkyl, alkenyl, alkynyl, and aryl moieties. These moieties also include alkyl, alkenyl, alkynyl, and aryl moieties substituted with other aliphatic or cyclic hydrocarbon groups, such as alkaryl, alkenaryl and alkynaryl. Unless otherwise indicated, these moieties preferably comprise 1 to 20 carbon atoms.

The"substituted hydrocarbyl moieties described herein are hydrocarbyl moieties which are substituted with at least one atom other than carbon, including moieties in which a carbon chain atom is substituted with a heteroatom such as nitrogen, oxygen, silicon, phosphorus, boron, sulfur, or a halogen atom. Exemplary substituted hydrocarbyl moieties include, heterocyclo, alkoxyalkyl, alkenyloxyalkyl, alkynyloxyalkyl, aryloxyalkyl, hydroxyalkyl, protected hydroxyalkyl, keto, acyl, nitroalkyl, aminoalkyl, cyano, alkylthioalkyl, arylthioalkyl, ketals, acetals, amides, acids, esters and the like.

The term"heteroatom"shall mean atoms other than carbon and hydrogen.

Unless otherwise indicated, the alkyl groups described herein are preferably lower alkyl containing from one to eight carbon atoms in the principal chain and up to 20 carbon atoms. They may be straight or branched chain or cyclic and include methyl, ethyl, propyl, isopropyl, butyl, hexyl and the like.

Unless otherwise indicated, the alkenyl groups described herein are preferably lower alkenyl containing from two to eight carbon atoms in the principal chain and up to 20 carbon atoms. They may be straight or branched chain or cyclic and include ethenyl, propenyl, isopropenyl, butenyl, isobutenyl, hexenyl, and the like.

Unless otherwise indicated, the alkynyl groups described herein are preferably lower alkynyl containing from two to eight carbon atoms in the principal chain and up to 20 carbon atoms. They may be straight or branched chain and include ethynyl, propynyl, butynyl, isobutynyl, hexynyl, and the like.

The terms"aryl"or"ar"as used herein alone or as part of another group denote optionally substituted homocyclic aromatic groups, preferably monocyclic or bicyclic groups containing from 6 to 12 carbons in the ring portion, such as phenyl, biphenyl, naphthyl, substituted phenyl, substituted biphenyl or substituted naphthyl.

Phenyl and substituted phenyl are the more preferred aryl.

The terms"halogen"or"halo"as used herein alone or as part of another group refer to chlorine, bromine, fluorine, and iodine.

The terms"heterocyclo"or"heterocyclic"as used herein alone or as part of another group denote optionally substituted, fully saturated or unsaturated, monocyclic or bicyclic, aromatic or nonaromatic groups having at least one heteroatom in at least one ring, and preferably 5 or 6 atoms in each ring. The heterocyclo group preferably has 1 or 2 oxygen atoms, 1 or 2 sulfur atoms, and/or 1 to 4 nitrogen atoms in the ring, and may be bonded to the remainder of the molecule through a carbon or heteroatom.

Exemplary heterocyclo include heteroaromatics such as furyl, thienyl, pyridyl, oxazolyl, pyrrolyl, indolyl, quinolinyl, or isoquinolinyl and the like. Exemplary substituents include one or more of the following groups: hydrocarbyl, substituted hydrocarbyl, keto, hydroxy, protected hydroxy, acyl, acyloxy, alkoxy, alkoxy, alkynoxy, aryloxy, halogen, amido, amino, nitro, cyano, thiol, ketals, acetals, esters and ethers.

The term"heteroaromatic"as used herein alone or as part of another group denote optionally substituted aromatic groups having at least one heteroatom in at least one ring, and preferably 5 or 6 atoms in each ring. The heteroaromatic group preferably has 1 or 2 oxygen atoms, 1 or 2 sulfur atoms, and/or 1 to 4 nitrogen atoms in the ring, and may be bonded to the remainder of the molecule through a carbon or heteroatom. Exemplary heteroaromatics include furyl, thienyl, pyridyl, oxazolyl, pyrrolyl, indolyl, quinolinyl, or isoquinolinyl and the like.

Exemplary substituents include one or more of the following groups: hydrocarbyl, substituted hydrocarbyl, keto, hydroxy, protected hydroxy, acyl, acyloxy, alkoxy, alkoxy, alkynoxy, aryloxy, halogen, amido, amino, nitro, cyano, thiol, ketals, acetals, esters and ethers.

The term"acyl,"as used herein alone or as part of another group, denotes the moiety formed by removal of the hydroxyl group from the group-COOH of an organic carboxylic acid, e. g. , RC (O)-, wherein R is hydrogen, R1, RlO-, RIR 2N-, or R1S-, Rl is hydrocarbyl, heterosubstituted hydrocarbyl, or heterocyclo, and R2 is hydrogen, hydrocarbyl or substituted hydrocarbyl.

The term"acyloxy, "as used herein alone or as part of another group, denotes an acyl group as described above bonded through an oxygen linkage (-0-), e. g. , RC (0) O- wherein R is as defined in connection with the term"acyl." The term"acetamidyl"as used. herein describes a chemical moiety represented by the formula NR, C (O) R2' The term"carboxamido"as used herein, describes a chemical moiety represented by the formula C (O) NRlR2.

The term"alkoxycarbonyl"as used herein describes a chemical moiety represented by the formula C (O) OR.

The term"sulfonamido"as used herein describes a chemical moiety represented by the formula S02NRlR2.

The term"alkylsulfonyl"as used herein describes a chemical moiety represented by the formula S02R.

The term"sulfonamidyl"as used herein describes a chemical moiety represented by the formula NRSO. R.

As described herein for the terms"acetamidyl", "carboxamido","alkocycarbonyl","sulfonamido", "alkylsulfonyl", and"sulfonamidyl", R, Rl and R2 are independently hydrogen, alkyl, aryl, and arylakyl, optionally substituted with halogen, hydroxy or alkoxy.

Description of the Preferred Embodiment One aspect of the invention embraces compounds that correspond to formula (I) wherein: X comprises a 5-or 6-membered heterocyclic or aromatic ring, the ring atoms being Xi, X2, X3, X4, and X5 for 5-membered heterocyclic rings and X1, X2, X3, X4, XS and X6 for 6-membered heterocyclic or aromatic rings, wherein X2 is alpha to each of Xl and X3, X3 is alpha to each of X2 and X4, X4 is alpha to each of X3 and X5, Xs is alpha to X4 and alpha to Xi if X is a 5-membered ring or to X6 if X is a 6- membered ring, and X, when present, is alpha to each of Dz and X5, wherein Xl, X2, X3, X4, X5 and X6 are carbon, nitrogen, oxygen or sulfur ; Ll, L3 and L4 are linkages through which Zl Z3, and Z4, respectively, are covalently bonded to different ring atoms of the 5-or 6-membered heterocyclic or aromatic ring of X, wherein Zi is covalently bonded to Xl, Z3 is covalently bonded to X3, and Z4 is covalently bonded to X4, each of Ll, L3 and L4 independently being a covalent bond or comprising one or more atoms through which Zl, Z3, and Z4 are covalently bonded to Xl, X3 and X4, respectively; Z1 is hydrocarbyl or substituted hydrocarbyl; Z3 comprises a 5-or 6-membered heterocyclic or aromatic ring substituted with a derivatized amidine which, upon hydrolysis, oxidation, reduction or elimination yields an amidine group, and optionally further substituted with a halogen or hydroxy, the ring atoms of the 5-or 6-membered heterocyclic or aromatic ring of Z3 being carbon, sulfur, nitrogen, or oxygen; Z4 comprises a 5-or 6-membered heterocyclic or carbocyclic ring having two substituents, R42 and R44, and two ring atoms each of which is in the beta position relative to the ring atom of Z4 through which Z4 is covalently bonded to X, wherein one of R42 and R44 is covalently bonded to one of said beta positions and the other of R42 and R44 is covalently bonded to the other of. said beta positions, the ring atoms of the 5-or 6-membered heterocyclic or carbocyclic ring of Z4 being carbon, nitrogen, oxygen, or sulfur; R42 is amino; and R44 is selected from the group consisting of hydrogen, hydrocarbyl, substituted hydrocarbyl, heterocyclo, halogen, or a substituted or unsubstituted heteroatom selected from nitrogen, oxygen, sulfur and phosphorus; provided, however, the derivatized amidine is other than amidine derivatized with t-butoxycarbonyl.

In another embodiment for compounds having formula (I), each of Xl, X2, X3, X4, X5 and X6 is carbon or nitrogen; X is a hydrogen bond acceptor; L1 is-XgNH-wherein Xg is covalently bonded directly to Z1 and Xg is a direct bond or - (CH2)m- wherein m is 1 to 5; L3is a glycine derivative; L4 is a direct bond; Z1 is selected from the group consisting of Cl-C8 alkyl, C2-C8 alkenyl, and C2-C8 alkynyl, the alkyl, alkenyl, or alkynyl being optionally substituted at any substitutable position with a halogen; Z3 comprises a phenyl, furanyl or thienyl ring, the phenyl, furanyl or thienyl ring being substituted with a derivatized amidine which, upon hydrolysis, oxidation, reduction or elimination yields an amidine group, and optionally further substituted with fluorine or hydroxy; . Z4 comprises a phenyl or thienyl ring having two substituents, R42 and R44, and two ring atoms each of which is in the beta position relative to the ring atom of Z4 through which Z4 is covalently bonded to X, wherein one of R42 and R44 is covalently bonded to one of said beta positions and the other of R42 and R44 is covalently bonded to the other of said beta positions; R42 is amino; and R44 is selected from the group consisting of hydrocarbyl, substituted hydrocarbyl, heterocyclo, halogen, and an optionally substituted heteroatom selected from nitrogen, oxygen, sulfur and phosphorus.

In one embodiment for compounds having formula (I), the L1 linkage is-XgNH~ where Xg is covalently bonded directly to Z1 and is a direct bond or an alkylene chain having the formula (CH2) m wherein m is 0 to 5. In an alternative embodiment, m is 0 to 2. In another embodiment, the L1 linkage is a bond.

In another embodiment for compounds having formula (1), the L3 linkage is a glycine derivative, an alanine derivative, an amino derivative, or a sulfonyl derivative.

In an alternative embodiment, the L3 linkage is a glycine derivative. In still another embodiment, the L3 linkage is - CH2CONHCH2-where Z3 is covalently bonded to the methylene bonded to the amine nitrogen of L3.

In a further embodiment for compounds having formula (I), the L4 linkage is a direct bond, methylene, ethylene or an optionally substituted heteroatom selected from the group nitrogen, oxygen, sulfur or phosphorus. In another embodiment, the L4 linkage is a direct bond.

In yet another embodiment for compounds having formula (I), Zi is a Ci-Cg alkyl optionally substituted at any substitutable position with fluorine, hydroxy, carboxy or alkoxycarbonyl. Generally speaking, the Ci-Cg alkyl is a cyclopropyl, isopropyl, methyl, ethyl, cyclobutyl, isobutyl, tert-butyl and sec-butyl optionally substituted at any substitutable position with fluorine, hydroxy, carboxy, or alkoxycarbonyl. In another embodiment, the C1- C5 alkyl is isopropyl or cyclobutyl optionally substituted at any substitutable position with fluorine, hydroxy, carboxy, or alkoxycarbonyl.

A further embodiment embraces compounds having formula (I) where Z3 is -R300C(=NR301)NR302R303, wherein R300 is a 6- membered carbocyclic aromatic ring, R301, R302, R303 are independently selected from the group consisting of hydrogen, halogen, optionally substituted hydrocarbyl, and an optionally substituted heteroatom selected from the group consisting of oxygen, nitrogen, phosphorus and sulfur, provided at least one of R301, R302, R303 is other than hydrogen. In yet another embodiment, Z3 is -R300C (=NR30l) NR3o2R3o3l wherein R300 is a 6-membered carbocyclic aromatic ring, and at least two of R3e11 R302, R303 are ring atoms of a heterocyclic ring. In an alternative embodiment, Z3 is -R300C (=NR301)NR302R303, R300 is a 6-membered carbocyclic aromatic ring, and at least one of R301, R302, R303 are ring atoms of a heterocyclic ring fused to R3oo- Yet another embodiment encompasses compounds having formula (I) where Z3 is a benzamidine derivatized with one or more groups selected from carbonyl, thiocarbonyl, imino, enamino, phosphorus, and sulfur, where the benzamidine derivative hydrolyzes under physiological conditions to form benzamidine. In a further embodiment, Z3 is a benzamidine derivatized with one or more groups selected from optionally substituted hydrocarbyl, provided that the carbon atom directly bonded to the amidine is Sp3 hybridized and aryl, where the benzamidine derivative is oxidized under physiological conditions to form benzamidine. In yet another embodiment, Z3 is a benzamidine derivatized with one or more heteroatoms selected from oxygen, nitrogen in its most reduced state, and sulfur in its most reduced state, where the benzamidine derivative is reduced under physiological conditions to form benzamidine. In still another embodiment, Z3 is a benzamidine derivatized with one or more substituents selected from a hydrocarbyl substituted at the beta carbon with carbonyl, sulfonyl, sulfinyl, cyano, nitro and an alkyl, aryl, or heterocyclic group substituted with oxygen, nitrogen, or sulfur at the carbon directly bonded to the amidine group, where the benzamidine derivative undergoes elimination at physiological conditions to form benzamidine.

In a further embodiment for compounds having formula (I), Z3 corresponds to formula (a) wherein: R302, R302, and R303 are independently selected from the group consisting of: (i) hydrogen, -C (=O) Ra,-C (=O) ORa,-S (=O) ORa, -S(=O)SRa, -S(=O)2ORa, -S(=O)2SRa and alkenyl, wherein Ra is selected from the group consisting of hydrocarbyl, substituted hydrocarbyl, and heterocyclo, provided, however, that the carbon atom of R301, R302, and R303 directly bonded to the amidine is sp2 hybridized when R301, R302f and R303 is alkenyl, (ii) hydrogen, optionally substituted hydrocarbyl and aryl, provided, however, the carbon atom of R301, R302, and R303 directly bonded to the amidine is Sp3 hybridized when R301, R302, and R303 is optionally substituted hydrocarbyl, (iii) hydrogen,-ORb,-SRb,-NRb, or-N (Rb) 2, wherein each Rb is independently optionally substituted hydrocarbyl, and heterocyclo, and (iv) hydrogen, substituted hydrocarbyl wherein the carbon bonded to the amidine group is substituted with -ORc, -SRC,-NRC, or-N (Rjs, wherein each Rc is independently -C (O) Rd, -C (O) NRd,-C (O) ORd,-C (O) N (Rd) 2 and each Rd is independently hydrocarbyl, substituted hydrocarbyl or heterocyclo, and substituted alkyl with the carbon atom beta to the point of attachment to the amidine group being an unsaturated electron withdrawing group, provided, however, at least one of R301, R302, and R303 is other than hydrogen; R304 is selected from the group consisting of halogen, hydrogen, hydroxyl, alkyl, sulfhydryl, alkoxy, and alkylthio; R305 is selected from the group consisting of oxygen, sulfur, halogen, hydrogen, hydroxyl, alkyl, sulfhydryl, alkoxy, and alkylthio; R306 is selected from the group consisting of halogen, hydrogen, hydroxyl, alkyl, sulfhydryl, alkoxy, and alkylthio; and R307 is selected from the group consisting of oxygen, sulfur, halogen, hydrogen, hydroxyl, alkyl, sulfhydryl, alkoxy, and alkylthio.

In one embodiment, the benzamidine derivative is hydrolyzed under physiological conditions to form benzamidine when Z3 is a benzamidine derivative having formula (a) and R301, R302, and R303 are independently selected from hydrogen,-C (=O) Ra,-C (=O) ORa,-S (=O) ORa, - S (=O) SRa,-S (=O) 20Ra,-S (=0) 2SRa and alkenyl, wherein Ra is selected from the group consisting of hydrocarbyl, substituted hydrocarbyl, and heterocyclo, provided, however, that the carbon atom of R301, R302, and R303 directly bonded to the amidine is sp2 hybridized when R301, R302, and R303 is alkenyl.

In a further embodiment, the benzamidine derivative is oxidized under physiological conditions to form benzamidine when Z3 is a benzamidine derivative having formula (a) and R301, R302, and R303 are independently selected from hydrogen, optionally substituted hydrocarbyl and aryl, provided, however, the carbon atom of R301, R302, and R303 directly bonded to the amidine is Sp3 hybridized when R301, R. 3oz, and R303 is optionally substituted hydrocarbyl.

In still another embodiment, the benzamidine derivative is reduced under physiological conditions to. form benzamidine when Z3 is a benzamidine derivative having formula (a) and R301, R302, and R303 are independently selected from hydrogen,-ORb,-SRb,-NRb, or-N (Rb) 2r wherein each Rb is independently optionally substituted hydrocarbyl, and heterocyclo.

In an alternative embodiment, the benzamidine derivative undergoes elimination at physiological conditions to form benzamidine when Z3 is a benzamidine derivative having formula (a) and R301, R302, and R303 are independently selected from hydrogen, substituted hydrocarbyl wherein the carbon bonded to the amidine group is substituted with-ORC,-SRC,-NRC, or-N (RC) 21 wherein each Rc is independently-C (O) Rd,-C (O) NRd,-C (O) ORd, -C(O) N (Rd) 2 and each Rd is independently hydrocarbyl, substituted hydrocarbyl or heterocyclo, and substituted alkyl with the carbon atom beta to the point of attachment to the amidine group being an unsaturated electron withdrawing group.

In a further embodiment for compounds having formula (I), Z3 may be any of the benzamidine derivatives illustrated in Table 1 or 3 below.

A further embodiment embraces compounds having formula (I) where Z4 is a substituted, 6-membered carbocyclic aromatic ring. In an alternative of this embodiment, Z4 corresponds to formula (b) wherein: R42 is amino; R44 is selected from the group consisting of hydrocarbyl, substituted hydrocarbyl, halogen and an optionally substituted heteroatom selected from the group consisting of oxygen, nitrogen, and sulfur; and R41, R43 and R45 are independently selected from the group consisting of hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, and an optionally substituted heteroatom selected from the group consisting of oxygen, nitrogen, and sulfur.

In another embodiment of compounds wherein Z4 corresponds to formula (b) and R42 is amino, R44 is selected from hydrocarbyl, substituted hydrocarbyl, acetamido, alkoxy, hydroxy, amino, alkylsulfonyl, haloalkyl, haloalkoxy, haloalkylthio, carboalkoxy, carboxy, carboxamidoalkyl, and carboxamidoalkylaryl. In an alternative of this embodiment, R44 is selected from hydrogen, hydrocarbyl, substituted hydrocarbyl, heteroaryl, heterocyclo, halogen, acetamido, guanidino, hydroxy, nitro, amino, amidosulfonyl, acylamido, hydrocarbyloxy, substituted hydrocarbyloxy, hydrocarbylthio, substituted hydrocarbylthio, hydrocarbylsulfonyl, and substituted hydrocarbylsulfonyl. In yet another alternative of this embodiment, R44 is selected from the group consisting of hydroxy, isobutylsulfonyl, trifluoromethyl, carboxamidobenzyl, carboxamidobutyl-2-yl, isobutyramido, isobutoxy, carboethoxy, carboxyl, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1-carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m-fluorobenzylamide,-1- methylbenzylamide, sec-butylamide, benzylacylamine, isobutylamide, sec-pentylamine, cyclopentylacylamine, 1- carboxyl-2-methylbutylamide, isobutylacylamine, isobutylsulfoxyl, 2-cyclohexylamide, methoxy, sulfonamide, isobutylsulfonamide, aminoacyltrifluoromethyl, and carbmethoxy. In still another alternative of this embodiment R4l, R43 and R4S are independently selected from the group consisting of hydrogen, halogen, alkoxy, or hydroxy and R44 is as defined in any of the alternative embodiments above. In yet another alternative of this embodiment, R41, R43 and R45 are independently selected from the group consisting of hydrogen and halogen and R44 is as defined in any of the alternative embodiments above.

In another embodiment for compounds wherein Z4 corresponds to formula (b) and R42 is amino, R41 is selected from the group consisting of hydrocarbyl, substituted hydrocarbyl, acetamidyl, alkoxy, hydroxy, amino, alkylsulfonyl, haloalkoxy, haloalkythio, alkoxycarbonyl, carboxy, sulfonamido, carboxamido and sulfonamidyl, optionally substituted with fluorine. In another alternative of this embodiment (i. e. , when Z4 corresponds to formula (b) and R42 is amino), R,, is selected from the group consisting of hydrocarbyl, substituted hydrocarbyl, acetamidyl, alkoxy, hydroxy, amino, alkylsulfonyl, haloalkoxy, haloalkythio, alkoxycarbonyl, sulfonamido, carboxamido and sulfonamidyl, optionally substituted with fluorine. In still another alternative of this embodiment, , R4. is selected from the group consisting of hydroxy, carboxy, carboxamido, alkoxy, alkylsulfonyl, sulfonamido, and alkoxycarbonyl. In yet another alternative of this embodiment, R45 is selected from the group consisting of sec-butylamide, carboxy, ethoxycarbonyl, isopropoxycarbonyl, butoxycarbonyl, isopropylamide and hydroxy. In still another alternative of this embodiment, R43 and R44 are independently selected from the group consisting of hydrogen, halogen, alkoxy, or hydroxy and R45 is as defined in any of the alternative embodiments above.

In yet another alternative of this embodiment, R4l, R43 and R44 are independently selected from the group consisting of hydrogen and halogen and R45 is as defined in any of the alternative embodiments above.

In yet another embodiment for compounds wherein Z4 corresponds to formula (b) and R42 is amino, R43 is selected from the group consisting of hydrocarbyl, substituted hydrocarbyl, acetamidyl, alkoxy, hydroxy, amino, alkylsulfonyl, haloalkoxy, haloalkythio, alkoxycarbonyl, carboxy, sulfonamido, carboxamido and sulfonamidyl, optionally substituted with fluorine. In another alternative of this embodiment (i. e. , when Z4 corresponds to formula (b) and R42 is amino), R43 is selected from the group consisting of hydrocarbyl, substituted hydrocarbyl, acetamidyl, alkoxy, hydroxy, amino, alkylsulfonyl, haloalkoxy, haloalkythio, alkoxycarbonyl, sulfonamido, carboxamido and sulfonamidyl, optionally substituted with fluorine. In still another alternative of this embodiment, R43 is selected from the group consisting of hydroxy, carboxy, carboxamido, alkoxy, alkylsulfonyl, sulfonamido, and alkoxycarbonyl. In yet another alternative of this embodiment, R43 is selected from the group consisting of sec-butylamide, carboxy, ethoxycarbonyl, isopropoxycarbonyl, butoxycarbonyl, isopropylamide and hydroxy. In still another alternative of this embodiment, R44 and R45 are independently selected from the group consisting of hydrogen, halogen, alkoxy, or hydroxy and R43 is as defined in any of the alternative embodiments above.

In yet another alternative of this embodiment, R4l, R44 and R41 are independently selected from the group consisting of hydrogen and halogen and R43 is as defined in any of the alternative embodiments above.

In still another embodiment for compounds wherein Z4 corresponds to formula (b) and R42 is amino, R41 is selected from the group consisting of hydrocarbyl, substituted hydrocarbyl, acetamidyl, alkoxy, hydroxy, amino, alkylsulfonyl, haloalkoxy, haloalkythio, alkoxycarbonyl, carboxy, sulfonamido, carboxamido and sulfonamidyl, optionally substituted with fluorine. In another alternative of this embodiment (i. e. , when Z4 corresponds to formula (b) and R42 is amino), R41 is selected from the group consisting of hydrocarbyl, substituted hydrocarbyl, acetamidyl, alkoxy, hydroxy, amino, alkylsulfonyl, haloalkoxy, haloalkythio, alkoxycarbonyl, sulfonamido, carboxamido and sulfonamidyl, optionally substituted with fluorine. In still another alternative of this embodiment, R41 is selected from the group consisting of hydroxy, carboxy, carboxamido, alkoxy, alkylsulfonyl, sulfonamido, and alkoxycarbonyl. In yet another alternative of this embodiment, R41 is selected from the group consisting of sec-butylamide, carboxy, ethoxycarbonyl, isopropoxycarbonyl, butoxycarbonyl, isopropylamide and hydroxy. In still another alternative of this embodiment, R43 I R44 and R4. are independently selected from the group consisting of hydrogen, halogen, alkoxy, or hydroxy and R41 is as defined in any of the alternative embodiments above.

In yet another alternative of this embodiment, R43, R44 and R45 are independently selected from the group consisting of hydrogen and halogen and R4. is as defined in any of the alternative embodiments above.

In yet another embodiment, Z4 is a five-membered ring having formula (c) wherein: Z40, Z41, Z42, Z44, and Z4s are independently selected from the group consisting of carbon, nitrogen, oxygen and sulfur ; R42 is amino ; R44 is selected from the group consisting of is selected from the group consisting of hydrocarbyl, substituted hydrocarbyl, halogen and an optionally substituted heteroatom selected from the group consisting of oxygen, nitrogen, and sulfur; and R41 and R4s are independently selected from the group consisting of hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, and an optionally substituted heteroatom selected from the group consisting of oxygen, nitrogen, and sulfur.

In another embodiment of compounds wherein Z4 corresponds to formula (c) and R42 is amino, R44 is selected from hydrocarbyl, substituted hydrocarbyl, acetamido, alkoxy, hydroxy, amino, alkylsulfonyl, haloalkyl, haloalkoxy, haloalkylthio, carboalkoxy, carboxy, carboxamidoalkyl, and carboxamidoalkylaryl. In an alternative of this embodiment, R44 is selected from hydrogen, hydrocarbyl, substituted hydrocarbyl, heteroaryl, heterocyclo, halogen, acetamido, guanidino, hydroxy, nitro, amino, amidosulfonyl, acylamido, hydrocarbyloxy, substituted hydrocarbyloxy, hydrocarbylthio, substituted hydrocarbylthio, hydrocarbylsulfonyl, and substituted hydrocarbylsulfonyl. In yet another alternative of this embodiment, R14 is selected from the group consisting of hydroxy, isobutylsulfonyl, trifluoromethyl, carboxamidobenzyl, carboxamidobutyl-2-yl, isobutyramido, isobutoxy, carboethoxy, carboxyl, amino, 3- aminomethylthiophene,. benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1-carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m-fluorobenzylamide, 1- methylbenzylamide, sec-butylamide, benzylacylamine, isobutylamide, sec-pentylamine, cyclopentylacylamine, 1- carboxyl-2-methylbutylamide, isobutylacylamine, isobutylsulfoxyl, 2-cyclohexylamide, methoxy, sulfonamide, isobutylsulfonamide, aminoacyltrifluoromethyl, and carbmethoxy. In still another alternative of this embodiment, Ruz and R45 are independently selected from the group consisting of hydrogen, halogen, alkoxy, or hydroxy and R44 is as defined in any of the alternative embodiments above. In yet another alternative of this embodiment, R41 and R45 are independently selected from the group consisting of hydrogen and halogen and R44 is as defined in any of the alternative embodiments above.

Still another embodiment provides compounds having formula (I) where X2 or Xs are hydrogen bond acceptors. In another embodiment, both X2 and Xsare hydrogen bond acceptors. Generally speaking, the phrase"hydrogen bond acceptor"encompasses heteroatoms having a lone pair of electrons available for hydrogen bonding. Suitable hydrogen bond acceptors, when taken with the carbon to which Z2 is attached, are typically selected from the group consisting of C (O), C (S), C (C1), C (Br), C (F), C (OH), COCH3, COR, C (SH), CSR, and CNRlR2 wherein R, Ri and R2 are independently hydrogen, alkyl, aryl, and arylakyl, . optionally substituted with halogen, hydroxy or alkoxy.

Suitable X2 groups include carbon substituted with hydrogen, fluorine, oxygen, or sulfur, nitrogen optionally substituted with hydrogen or oxygen, oxygen, or sulfur.

Suitable Xs groups include oxygen, sulfur, nitrogen, carbonyl and carbon substituted with a halogen selected from fluorine, chlorine and bromine.

In one embodiment for compounds having formula (I), each of Xi, X2, X3, X4, Xs and X6 is carbon or nitrogen, each of Xi, X2, X4, X5 and X6 is sp2 or sp3 hybridized, X3 is Sp3 hybridized and Ll, L3, L4'Zll Z3/Z4/R. 2, and R44 are as described above. In an alternative embodiment, X1, X4 and Xs are carbon, X2 is carbonyl and X3 and X6are nitrogen. In another embodiment, X1, X4 and X6 are carbon, X2 is carbonyl and X3 and Xsare nitrogen. In still another embodiment, X1, X4, Xs and X6 are carbon, X2 is carbonyl and X3 is nitrogen.

A further embodiment embraces compounds having formula (I), where Xi, X2, X3, X4, X5, and X6 form a 6-membered heterocyclic or carbocyclic ring selected from a pyrazinone, pyrimidinone, 2-pyridone, 4-pyrone, 4-pyridone, pyridine-N-oxide, 1,4-quinone, benzene, uracil, piperidinone, dihydropyrimidone, tetrahydropyrimidinone, dehydropiperidinedione, dihydropyrazinone, dihydroisoxazinone, tetrahydrotriazinedione, tetrahydrotriazinone, piperidine, and piperazine and L1, L3, L4, Z1, Z3, Z4, R42, and R44 are as described above. In an alternative embodiment, X1, X2, X3, X4, X5, and X6 form a pyrazinone, pyrimidinone, 2-pyridone, 4-pyrone, 4-pyridone, pyridine-N-oxide, 1,4-quinone, benzene, or uracil ring. In still another embodiment, the ring is a pyrazinone, pyrimidinone, or 2-pyridone.

In an alternative embodiment for compounds having formula (I), X1, X2, X3, X4, and Xs form a 5-membered heterocyclic or carbocyclic ring selected from a pyrazolinone, pyrrole, thiophene, pyrazole-N-oxide, 1- amino-pyrazole, 1,3, 4-triazole, 2-amino-4-aryl-thiazole, 2- . amino-5-aryl-thiazole, pyrrolidine, 2-amino-5-aryl-oxazole, 3-amino-pyrazole, 2-amino-4-aryl-asexual, tetrahydrofuran, cyclopentadienone, and N-hydroxypyrrolidine and L1, L3, L4, Z1, Z3, Z4, R42, and R44 are as described above. In another embodiment, X1, X2, X3, X4, and Xs form a pyrazolinone, thiophene, pyrazole-N-oxide, 2-amino-5-aryl-thiazole, tetrahydrofuran, cyclopentadienone, or N-hydroxypyrrolidine ring. In yet another embodiment, the ring is a pyrazolinone, pyrazole-N-oxide, cyclopentadienone, or N-- hydroxypyrrolidine. In a further embodiment, the ring is a pyrazolinone.

Yet another aspect of the invention embraces compounds that correspond to formula (II) wherein: each of X1, X2, X3, X4, Xs and X6 is carbon or nitrogen; X2 is a hydrogen bond acceptor; Xg is a direct bond or- (CH2) m- where m is 1 to 5; R42 and R44 are as defined for compounds having formula (I); and Zlt Z3, and Z4 are as defined for compounds having formula (I).

In yet another embodiment for compounds having formula (II), each of Xi, X2, X3, X4, Xs and X6 is carbon or nitrogen; X2 is a carbonyl; Xg is selected from the group consisting of a direct bond, methylene, and ethylene; Zi is selected from the group consisting of Cl-C8 alkyl, C2-C8 alkenyl, and C2-C. alkynyl, the alkyl, alkenyl, or alkynyl being optionally substituted at any substitutable position with a halogen; Z3 comprises a phenyl, furanyl or thienyl ring, the phenyl, furanyl or thienyl ring being substituted with a derivatized amidine which, upon hydrolysis, oxidation, reduction or elimination yields an amidine group, and optionally further substituted with fluorine or hydroxy; Z4 comprises a phenyl or thienyl ring having two substituents, R42 and R44, and two ring atoms each of which is in the beta position relative to the ring atom of Z4 through which Z4 is covalently bonded to X, wherein one of R42 and R44 is covalently bonded to one of said beta positions and the other of R42 and R44 is covalently bonded to the other of said beta positions; R42 is amino ; and R44 is selected from the group consisting of hydrocarbyl, substituted hydrocarbyl, heterocyclo, halogen, and an optionally substituted heteroatom selected from nitrogen, oxygen, sulfur and phosphorus.

In still another embodiment for compounds having formula (II), each of X1, X2, X3, X4, X5 and X6 is carbon or nitrogen; X2 is a carbonyl; Xg is a direct bond; Z1 is selected from the group consisting of cyclopropyl, isopropyl, methyl, ethyl, cyclobutyl, isobutyl, tert-butyl and sec-butyl optionally substituted at any substitutable position with fluorine, hydroxy, carboxy, or alkoxycarbonyl; Z3 iS-R300C (=NR3o) NR302R303 I wherein R300 is a phenyl ring, Rsor R302, R303 are independently selected from the group consisting of hydrogen, halogen, optionally substituted hydrocarbyl, and an optionally substituted heteroatom selected from the group consisting of oxygen, nitrogen, phosphorus and sulfur, provided at least one of R30l, R302, R303 is other than hydrogen; Z4 is a substituted phenyl ring; and R44 is selected from the group consisting of hydroxy, isobutylsulfonyl, trifluoromethyl, carboxamidobenzyl, carboxamidobutyl-2-yl, isobutyramido, isobutoxy, carboethoxy, carboxyl, amino, 3-aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1-carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m-fluorobenzylamide, 1- methylbenzylamide, sec-butylamide, benzylacylamine, isobutylamide, sec-pentylamine, cyclopentylacylamine, 1- carboxyl-2-methylbutylamide, isobutylacylamine, isobutylsulfoxyl, 2-cyclohexylamide, methoxy, sulfonamide, isobutylsulfonamide, aminoacyltrifluoromethyl, and carbmethoxy.

,. A further embodiment provides compounds having formula (II) that are represented by formula (IIa) wherein: each of Zl, Z3, Z4, R42 and R44 are as defined for compounds having formulas (I) and (II).

In another embodiment for compounds having formula (IIa), Z1 is selected from the group consisting of cyclopropyl, isopropyl, methyl, ethyl, cyclobutyl, isobutyl, tert-butyl and sec-butyl optionally substituted at any substitutable position with fluorine, hydroxy, carboxy, or alkoxycarbonyl; Z3 is-R30oC (=NR30l) NR302R303, wherein R300 is a phenyl ring, R301, R302, R303 are independently selected from the group consisting of hydrogen, halogen, optionally substituted . hydrocarbyl, and an optionally substituted heteroatom selected from the group consisting of oxygen, nitrogen, phosphorus and sulfur, provided at least one of R30l, R302, R303 is other than hydrogen; and Z4 is a phenyl ring having formula (b) wherein: R42 is amino; R44 is selected from the group consisting of hydroxy, isobutylsulfonyl, trifluoromethyl, carboxamidobenzyl, carboxamidobutyl-2-yl, isobutyramido, isobutoxy, carboethoxy, carboxyl, amino, 3-aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1-carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m-fluorobenzylamide, 1- methylbenzylamide, sec-butylamide, benzylacylamine, isobutylamide, sec-pentylamine, cyclopentylacylamine, 1- carboxyl-2-methylbutylamide, isobutylacylamine, isobutylsulfoxyl, 2-cyclohexylamide, methoxy, sulfonamide, isobutylsulfonamide, aminoacyltrifluoromethyl, and carbmethoxy; and R411 R43 and R4. are independently selected from the group consisting of hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, and an optionally substituted heteroatom selected from the group consisting of oxygen, nitrogen, and sulfur.

In yet another embodiment for compounds having formula (IIa), Zi is selected from the group consisting of cyclopropyl, isopropyl, methyl, ethyl, cyclobutyl, isobutyl, and sec-butyl optionally substituted at any substitutable position with fluorine, hydroxy, carboxy, or alkoxycarbonyl; Z3 may be any of the benzamidine derivatives illustrated in Table 1 or 3 below; and Z4, R42 and R44 are as described for any of the embodiments involving compounds having formula (IIa).

Yet a further embodiment provides compounds having . formula (II) that are represented by formula (IIb) wherein: each of Z1, Z3, Z4 R42 and R44 are as defined for compounds having formulas (I) and (II).

In an alternative embodiment for compounds having formula (IIb), Z, is selected from the group consisting of cyclopropyl, isopropyl, methyl, ethyl, cyclobutyl, isobutyl, tert-butyl and sec-butyl optionally substituted at any substitutable position with fluorine, hydroxy, carboxy, or alkoxycarbonyl; Z3 is -R300C (=NR301)NR302R303, wherein R300 is a phenyl ring, R301, R302, R303 are independently selected from the group consisting of hydrogen, halogen, optionally substituted hydrocarbyl, and an optionally substituted heteroatom selected from the group consisting of oxygen, nitrogen, phosphorus and sulfur, provided at least one of R30l, Ranz, R, 03 is other than hydrogen; and Z4 is a phenyl ring having formula (b) wherein: R42 is amino; R44 is selected from the group consisting of hydroxy, isobutylsulfonyl, trifluoromethyl, carboxamidobenzyl, carboxamidobutyl-2-yl, isobutyramido, isobutoxy, carboethoxy, carboxyl, amino, 3-aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, , methoxyethylamide, 1-carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m-fluorobenzylamide, 1- methylbenzylamide, sec-butylamide, benzylacylamine, isobutylamide, sec-pentylamine, cyclopentylacylamine, 1- carboxyl-2-methylbutylamide, isobutylacylamine, isobutylsulfoxyl, 2-cyclohexylamide, methoxy, sulfonamide, isobutylsulfonamide, aminoacyltrifluoromethyl, and carbmethoxy; and R43 and R45 are independently selected from the. group consisting of hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, and an optionally substituted heteroatom selected from the group consisting of oxygen, nitrogen, and sulfur.

In another embodiment for compounds having formula (IIb), Z1 is selected from the group consisting of cyclopropyl, isopropyl, methyl, ethyl, cyclobutyl, isobutyl, and sec-butyl optionally substituted at any substitutable position with fluorine, hydroxy, carboxy, or alkoxycarbonyl; Z3 may be any of the benzamidine derivatives illustrated in Table 1 or 3 below; and Z4, R42 and R44 are as described for any of the embodiments involving compounds having formula (IIb).

Still a further embodiment provides compounds having formula (II) that are represented by formula (IIc) wherein: each of Z1, Z3, Z4, R42 and R44 are as defined for compounds having formulas (I) and (II).

In an alternative embodiment for compounds having formula (IIc), Z1 is selected from the group consisting of cyclopropyl, isopropyl, methyl, ethyl, cyclobutyl, isobutyl, tert-butyl and sec-butyl optionally substituted at any substitutable position with fluorine, hydroxy, carboxy, or alkoxycarbonyl; Z3 is-R3ooC (=NR30l) NR3o2R3o3l wherein R300 is a phenyl ring, Razor R302, R303 are independently selected from the group consisting of hydrogen, halogen, optionally substituted. hydrocarbyl, and an optionally substituted heteroatom selected from the group consisting of oxygen, nitrogen, phosphorus and sulfur, provided at least one of R301, R302, R303 is other than hydrogen; and Z4 is a phenyl ring having formula (b) wherein: R42 is amino ; R44 is selected from the group consisting of hydroxy, isobutylsulfonyl, trifluoromethyl, carboxamidobenzyl, carboxamidobutyl-2-yl, isobutyramido, isobutoxy, carboethoxy, carboxyl, amino, 3-aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1-carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m-fluorobenzylamide, 1- methylbenzylamide, sec-butylamide, benzylacylamine, isobutylamide, sec-pentylamine, cyclopentylacylamine, 1- carboxyl-2-methylbutylamide, isobutylacylamine, isobutylsulfoxyl, 2-cyclohexylamide, methoxy, sulfonamide, isobutylsulfonamide, aminoacyltrifluoromethyl, and carbmethoxy; and R411 R43 and R4. are independently selected from the group consisting of hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, and an optionally substituted heteroatom selected from the group consisting of oxygen, nitrogen, and sulfur.

In another embodiment for compounds having formula (IIc), Z1 is selected from the group consisting of cyclopropyl, isopropyl, methyl, ethyl, cyclobutyl, isobutyl, and sec-butyl optionally substituted at any substitutable position with fluorine, hydroxy, carboxy, or alkoxycarbonyl; Z3 may be any of the benzamidine derivatives illustrated in Table 1 or 3 below; and Z4, R42 and R44 are as described for any of the embodiments involving compounds having formula (IIc).

A further aspect of the invention embraces compounds having formula (III) wherein: each of Z1, Z3, Xs and R44 are as defined for compounds having formulas (I) and (II).

In another embodiment for compounds having formula (III), Xs is CH, C (Cl) or C (F); Z1 is isopropyl, cyclopropyl, cyclobutyl or cycylopentyl optionally substituted by fluorine, hydroxy, carboxy, or alkoxycarbonyl; Z3 is-R300C (=NR301)NR302R303, wherein R300 is a 6-membered carbocyclic aromatic ring, R301, R302, R303 are independently selected from the group consisting of hydrogen, halogen, optionally substituted hydrocarbyl, and an optionally substituted heteroatom selected from the group consisting of oxygen, nitrogen, phosphorus and sulfur, provided at least one of R301, R302, R303 is other than hydrogen; and R44 is selected from the group consisting of hydroxy, . isobutylsulfonyl, trifluoromethyl, carboxamidobenzyl, carboxamidobutyl-2-yl, isobutyramido, isobutoxy, carboethoxy, carboxyl, amino, 3-aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1-carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m-fluorobenzylamide, 1- methylbenzylamide, sec-butylamide, benzylacylamine, isobutylamide, sec-pentylamine, cyclopentylacylamine, 1- carboxyl-2-methylbutylamide, isobutylacylamine, isobutylsulfoxyl, 2-cyclohexylamide, methoxy, sulfonamide, isobutylsulfonamide, aminoacyltrifluoromethyl, and carbmethoxy.

In another embodiment for compounds having formula (III), Kg is CH, and Z1l Z3, and R44 are any of the groups detailed in Table 1 below.

TABLE 1 Zi R44 z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, H phenyl, isobutylacylamine, N substituted trlEluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, substituted carboxamidobutyl-2-yl, ycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, henethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, 1- methylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Zl R44 Za alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, o phenyl, isobutylacylamine, N substituted trifluoromethyl, phenyl, isobutylsulfoxyl, NH 0 cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl nethoxyl, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted ethylbutylamide, alkyl, isobutylsulfonyl, H phenyl, isobutylacylamine, substituted trifluoromethyl,, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2-NH o or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, minoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, 1- methylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 z3 alkyl, hydroxy, 1-carboxyl-2- substituted ethylbutylamide, alkyl, isobutylsulfonyl, H phenyl, isobutylacylamine, N substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Zi Ra Za alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, 4 alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2-N or cyclohexylamide, substituted carboxamidobutyl-2-yl,/ cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, minoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, N Z substituted trifluoromethyl, phenyl, isobutylsulfoxyl, o- cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- ethyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or yclopentvlacylamine TABLE 1 Z R44 z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, o phenyl, isobutylacylamine, N-o substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2-NH2 or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, amincacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, lkyl, isobutylsulfonyl, henyl, isobutylacylamine, N substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2-NH or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- nethylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- entylamine, or cyclopentylacylamine TABLE 1 Z1 R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted ethylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, NH2 substituted carboxamidobutyl-2-yl, cycloalkyl ethoxyl, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 z3 alkyl, hydroxy, 1-carboxyl-2- l ubstituted nethylbutylamide, On alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, N cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, H2N substituted carboxamidobutyl-2-yl, ycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 z3 alkyl, hydroxy, 1-carboxyl-2-0 substituted ethylbutylamide, alkyl, isobutylsulfonyl, henyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- rcyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl nethoxyl, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- ethyl, carboxyl, carbmethoxy, amino, 3- minomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, yclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted ethylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, N phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl ethoxyl, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, arboethoxy, minoacyltrifluoro- ethyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, ethoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- ethylbenzylamide, sec- utylamide, enzylacylamine, isobutylamide, sec- entylamine, or cyclopentylacylamine TABLE 1 Z1 R44 z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted rifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2-N or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl nethoxyl, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, I alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, substituted carboxamidobutyl-2-yl, \/ cycloalkyl methoxy, isobutyramido, H2N sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, minoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 _ 1 R44 z3 alkyl, hydroxy, 1-carboxyl-2- substituted nethylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, substituted carboxamidobutyl-2-yl, ycloalkyl nethoxyl, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, arboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, nethoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, yclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- utylamide, Denzylacylamine, isobutylamide, sec- entylamine, or cyclopentylacylamine TABLE 1 Zl R44 z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, H substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, Neo substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 ZX R44 Za alkyl, hydroxy, 1-carboxyl-2- substituted nethylbutylamide, is z o alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, N o 0 substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- ethyl, carboxyl, carbmethoxy, amino, 3- minomethylthiophene, enzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, i < o alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, 1 Y /o 0 phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2-NHz or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl methoxyl, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, minoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, enzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- entylamine, or cyclopentylacylamine TABLE 1 Z1 R44 z3 Z3. R44 Z3 alkyl, tydroxy, l-carboxyl-2-F substituted methylbutylamide, alkyl, isobutylsulfonyl, oX henyl, isobutylacylamine, substituted trifluoromethyl, N phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, u substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- entylamine, or clopentvlacylamine TABLE 1 Z1 R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide,/s < o alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, henyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2-NH2 or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, minoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- ethylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 z3 alkyl, hydroxy, 1-carboxyl-2- substituted ethylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl,/ cycloalkyl, carboxamidobenzyl, 2-NH or cyclohexylamide, substituted carboxamidobutyl-2-yl, ycloalkyl ethoxyl, ° isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- entylamine, or cyclopentylacylamine TABLE 1 Z1 R44 z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, H, phenyl, isobutylacylamine, substituted rifluoromethyl, phenyl, isobutylsulfoxyl, NH cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- nethylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z3. R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted nethylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, \ o cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, substituted carboxamidobutyl-2-yl, H2N cycloalkyl methoxy, isobutyramido, o sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- Dutylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted ethylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, 0 cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, 0 substituted carboxamidobutyl-2-yl, H2N 0 0 0 cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z3. R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, F T XO substituted carboxamidobutyl-2-yl, \/ cycloalkyl nethoxyl, N isobutyramido, H2N sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- nethylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z, R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, N-OCH3 phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2-HN-OCH3 H -OCN3 or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z, R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2-Na or cyclohexylamide, \ substituted carboxamidobutyl-2-yl,/ cycloalkyl methoxy, isobutyramido, sulfonamide, isobutcxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, ?- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 z3 alkyl, hydroxy, 1-carboxyl-2-, substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, NH2 cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, minoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, </\O phenyl, isobutylsulfoxyl, \/ cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, H3COz/\ 3 substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclobentvlacylamine TABLE 1 I Z1 R44 z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, henyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl ethoxyl, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- ethyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, heenethylamine, isobutylamine, ethoxyethylamide, 1- carboxylbenzylamide, ?- fluorobenzylamide, cyclobutylamide, m- luorobenzylamide,'- methylbenzylamide, sec- butylamide, eenzylacylamine, isobutylamide, sec- entylam_ne, or cyclopentylacylamine TABLE 1 Z, R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, N phenyl, isobutylsulfoxyl, I % ycloalkyl, carboxamidobenzyl, r cyclohexylamide, N-o/ substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, - sobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacvlamire, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Ra za alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, S02CH3 phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, NH3 substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamrde, l- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- entylamine, or cyclopentylacylamine TABLE 1 Z3. R44 Z3 alkyl nydroxy l-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl henyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl methoxy isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, arboethoxy, minoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, ethoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, yclobutylamide, m- fluorobenzylamide, 1- ethylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- entylamine, or cyclopentylacylamine TABLE 1 Z1 R44 z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, N substituted trifluoromethyl, phenyl, isobutylsulfoxyl, Still cycloalkyl, carboxamidobenzyl, 2-\_ N or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl nethoxyl, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, arboethoxy, minoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, enzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 ZR ! Z Z1 R44 Z3 alkyl, ydroxy, 1-carboxyl-2- substituted ethylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2-ors or cyclohexylamide, Y Y. i substituted arboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, minoacyltrifluoro- ethyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, henethylamlne, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- ethylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- entylamine, or cyclopentylacylamine TABLE 1 Z1 244 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted ethylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, H substituted trifluoromethyl, phenyl, isobutylsulfoxyl,/ cycloalkyl, carboxamidobenzyl, 2-p N r cyclohexylamide, substituted arboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, minoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, Denzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- arboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- Dutylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, z- substituted arboxamidobutyl-2-yl, HO cycloalkyl nethoxyl, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- ethyl, carboxyl, carbmethoxy, amino, 3- minomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, ?- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- nethylbenzylamide, sec- Dutylamide, enzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacvlamine TABLE 1 1 R « 3 lkyl, hydroxy, l-carboxyl-2- substituted ethylbutylamide, lkyl, isobutylsulfonyl, henyl, isobutylacylamine, substituted trifluoromethyl, 0 henyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2-N or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl nethoxyl, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentYlacylamine TABLE 1 Z1 R44 3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2-\ or cyclohexylamide, substituted carboxamidobutyl-2-yl, HO cycloalkyl nethoxyl, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, minoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, N substituted trifluoromethyl,/ phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2-N--@ or cyclohexylamide, substituted carboxamidobutyl-2-yl, H cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- ethylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z, R44 Z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, ~'OCH3 cycloalkyl, carboxamidobenzyl, 2-\ or cyclohexylamide, NH substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 z3 alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, ? henyl, isobutylacylamine, H substituted trifluoromethyl, N phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- rcyclohexylamide, \ substituted arboxamidobutyl-2-yl, cycloalkyl nethoxyl, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, arboethoxy, rminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, Denzylamlne' phenethylamine, isobutylamine, methoxyethylamide, carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, _. nethylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 44 z3 alkyl, hydroxy, 1-carboxyl-2-OH substituted methylbutylamide,/ alkyl, isobutylsulfonyl, N-OH phenyl, isobutylacylamine,/\// substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2-NH2 or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl ethoxyl, isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- ethyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, enzylamine, phenethylamine, isobutylamine, methoxyethylamide, i- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- utylamide, enzylacylamine, isobutylamide, sec- entylamine, or cyclopentylacylamine TABLE 1 Z1 R44 Z3 alkyl, hydroxy, l-carboxyl-2-F OH substituted ethylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or yclohexylamlde,/2 substituted arboxamidobutyl-2-yl, cycloalkyl ethoxyl, F F isobutyramido, sulfonamide, isobutcxy, isobutylsulfonamide, carboethoxy, minoacyltrifluoro- ethyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, henethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, yclobutylamide, m- fluorobenzylamide, 1- ethylbenzylamide, sec- utylamide, enzylacylamine, isobutylamide, sec- entylamine, or cyclopentylacylamine TABLE 1 Z1 P'4 4 Z3 alkyl, hydroxy, 1-carboxyl-2-F OH substituted methylbutylamide, \/ alkyl, isobutylsulfonyl, henyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, NH2 substituted carboxamidobutyl-2-yl,/ cycloalkyl methoxy, F isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Zi Ra Za alkyl, hydroxy, 1-carboxyl-2- substituted methylbutylamide, alkyl, isobutylsulfonyl, phenyl, isobutylacylamine, substituted trifluoromethyl, phenyl, isobutylsulfoxyl, cycloalkyl, carboxamidobenzyl, 2-8 \\//\ or cyclohexylamide, NH2 substituted carboxamidobutyl-2-yl,/ cycloalkyl methoxy, F isobutyramido, sulfonamide, isobutoxy, isobutylsulfonamide, carboethoxy, minoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, Lsobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or vclopentylacylamine TABLE 1 - Z1 R44 z3 alkyl, hydroxy, 1-carboxyl-2-F OH O substituted methylbutylamide, alkyl, isobutylsulfonyl,- phenyl, isobutylacylamine, substituted trifluoromethyl, NH2 phenyl, isobutylsulfoxyl, F F cycloalkyl, carboxamidobenzyl, 2- r cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobutcxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, 1- carboxylbenzylamide, p- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, 1- methylbenzylamide, sec- utylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine TABLE 1 Z1 R44 Z3 alkyl, hydroxy, 1-carboxyl-2-0 substituted ethylbutylamide, alkyl, isobutylsulfonyl, 4 0 phenyl, isobutylacylamine, substituted trifluoromethyl, NH, phenyl, isobutylsulfoxyl, F cycloalkyl, carboxamidobenzyl, 2- or cyclohexylamide, substituted carboxamidobutyl-2-yl, cycloalkyl methoxy, isobutyramido, sulfonamide, isobucxy, isobutylsulfonamide, carboethoxy, aminoacyltrifluoro- methyl, carboxyl, carbmethoxy, amino, 3- aminomethylthiophene, benzylamine, phenethylamine, isobutylamine, methoxyethylamide, i- carboxylbenzylamide, ?- fluorobenzylamide, cyclobutylamide, m- fluorobenzylamide, methylbenzylamide, sec- butylamide, benzylacylamine, isobutylamide, sec- pentylamine, or cyclopentylacylamine For convenience, each of the substituents identified for R44 in Table 1 is set forth below. OH CF3 OH p i i ? 7 hydroxy isobutylsulfonyl trifluoromethyl O o %- isobutoxy carboehoxy carboxyl 0 0 0 ., N N. N H I H H. carboxamidobenzyl carboxamidobutyl-2-yl isobutyramido toN O N \ . 7 \ S' N'"7 N /'P H H phenethylamine isobutylamine methoxyethylamide NH2 Y-N Y-N H I H I S amino 3-aminomethylthiophene benzylamine 0 COzH 0 0 Zon H H I l F H 1-carboxylbenzylamide p-fluorobenzylamide cyclobutylamide R or S ISOMERS 0 0 0 2, F H H H ip N N N H I H m-fluorobenzylamide l-mechylbenzylamide sec-butylamide RACEMIC or R or S R or S ISOMERS 0 O 0 z N 4 H H H H H benzylacylamine isobuylan'. ide sec-pentylamine 0 0 CH3 N OCH3 i N"t,., OCH3 7 H ir2, 7 isobutylsulfoxyl 2-cyclohex-ylamide methoxyl R or S ISOMERS 0 O COZH 0 L,, H N N H H cyclopentylacylamine l-carboxyl-2-mefhylb_~ylamide isobutylacylamine 0 0 F H F O O H I H F 0 sulfonamide isobutylsulfonamide aminoacyltrifluoromethyl A further embodiment provides compounds having formula (III) that are represented by formula (IIIa) HzN \/R44 s 0 N 0 N N v N 0 0 1'/N-R301 O /N-Rso carbmethoxy N-R302 R303 (IIIa) wherein: each of Zlt X, and R44 are as defined for any embodiment of compounds having formula III; R301, R302, and R303 are independently selected from the group consisting of: (i) hydrogen,-C (=O) Ra,-C (=O) ORa,-S (=O) ORa, -S (=O) SRa,-S (=O) 2ORa,-S (=O) 2SRa and alkenyl, wherein Ra is selected from the group consisting of hydrocarbyl, substituted hydrocarbyl, and heterocyclo, provided, however, that the carbon atom of R301, R302, and R303 directly bonded to the amidine is sp2 hybridized when R301, R302, and R303 is alkenyl, (ii) hydrogen, optionally substituted hydrocarbyl and aryl, provided, however, the carbon atom of R301, R302, and R303 directly bonded to the amidine is Sp3 hybridized when R301, R302, and R303 is optionally substituted hydrocarbyl, (iii) hydrogen,-ORb,-SRb,-NRb, or-N (Rb) 2, wherein each Rb is independently optionally substituted hydrocarbyl, and heterocyclo, and (iv) hydrogen, substituted hydrocarbyl wherein the carbon bonded to the amidine group is substituted with -ORc, -SRc, -NRc, or-N (RC) 21 wherein each Rc is independently - C (O) Rd,-C (O) NRd,-C (O) ORd,-C (0) N (Rd)2 and each Rd is independently hydrocarbyl, substituted hydrocarbyl or heterocyclo, and substituted alkyl with the carbon atom beta to the point of attachment to the amidine group being an unsaturated electron withdrawing group, provided, however, at least one of R301, R302, and R303 is other than hydrogen; and R310 and R311 are independently selected from the group consisting of hydrogen, fluorine, hydroxy, alkoxy, and carboxy, provided at least one of R..,) and R311 is other than fluorine and hydrogen.

Yet a further aspect of the invention embraces compounds having formula (IV) wherein: each of Z1, R44, R301, R302, R303, R310 and R311 are as defined for any embodiment of compounds having formula (IIIa).

Another embodiment provides compounds having formula (IV) that are represented by formula (IVa) wherein: each of Z1, R30i, , R302, R303, R310 and R311 are as defined for any embodiment of compounds having formula (IIIa) ; and R440 is Cl-C6 alkyl, aryl, aralkyl, carboxy, or carboxyalkyl, wherein the alkyl, aryl, aralkyl, carboxy, or carboxyalkyl is optionally further substituted by fluorine.

Still a further embodiment provides compounds having formula (IV) that are represented by formula (IVb) (IVb) wherein: each of Z1, R301, R302, R303, R310 and R311 are as defined for any embodiment of compounds having formula (IIIa) ; and R440 is Cl-C6 alkyl, aryl, aralkyl, carboxy, or carboxyalkyl, wherein the alkyl, aryl, aralkyl, carboxy, or carboxyalkyl is optionally further substituted by fluorine.

In yet a further embodiment, compounds having any one of formulas (IV), (IVa) or (IVb) are selected from the compounds in Table 2 below: TABLE 2 TABLE 2 TABLE 2 TABLE 2 TABLE 2 wherein : Z1 is isopropyl or cyclopropyl optionally substituted with fluorine, hydroxy, carboxy, or alkoxycarbonyl; R301, R302, and R303 are independently selected from the group consisting of: (i) hydrogen,-C (=O) Ra,-C (=O) ORa,-S (=O) ORa, -S(=O) SRa, -S(=O)2ORa, -S(=O)2SRa and alkenyl, wherein Ra is selected from the group consisting of hydrocarbyl, substituted hydrocarbyl, and heterocyc'o, provided, however, that the carbon atom of R301, R302, and R303 directly bonded to the amidine is sp2 hybridized when R301, R302, and R303 is alkenyl, (ii) hydrogen, optionally substituted hydrocarbyl and aryl, provided, however, the carbon atom of R301, R302, and R303 directly bonded to the amidine is sp3 hybridized when R301, and R303 is optionally substituted hydrocarbyl, (iii) hydrogen, -ORb, -SRb, -NRb, or-N (Rb) 21 wherein each Rb is independently optionally substituted hydrocarbyl, and heterocyclo, and (iv) hydrogen, substituted hydrocarbyl wherein the carbon bonded to the amidine group is substituted with -ORc, -SRc, -NRc, or-N (RC) 2, wherein each Rc is independently-C (O) Rd,-C (O) NRd,-C (O) OR,-C (O) N (Rd) and each Rd is independently hydrocarbyl, substituted hydrocarbyl or heterocyclo, and substituted alkyl with the carbon atom beta to the point of attachment to the amidine group being an unsaturated electron withdrawing group, provided, however, at least one of R301, R302, and R303 is other than hydrogen; R305, when present, is hydrcxy or hydrogen; and When present, is hydrcxy or hydrogen, provided if R30s is hydroxy then R306 is hydrogen and if R305 is hydrogen then R306 is hydroxy.

Yet a further aspect of the invention embraces compounds having formula (V) wherein Xg is nitrogen, CH, C (F), C (C1), or C (Br) ; X6 is carbon or nitrogen, provided the dashed line represents a double bond when X6 is carbon and the dashed line represents a single bond when X6 is nitrogen; X, and X8 are independently carbon, nitrogen, oxygen or sulfur; is selected from the group consisting of Cl-C8 alkyl, C2-C8 alkenyl, and C2 alkynyl, the alkyl, alkenyl, or alkynyl being optionally substituted at any substitutable position with a halogen ; Z2 is a hydrogen bond acceptor covalently or datively bonded to the carbon gamma to X@.

Z3 comprises a substituted phenyl, thienyl, or furanyl ring, the phenyl, thienyl or furanyl ring being substituted with a derivatized amidine group and optionally substituted at any substitutable position with fluorine, hydroxy, carboxy, alkoxycarbonyl, or hydrocarbyloxy ; Z4 comprises a 5-or 6-membered heteroaryl or aryl ring, the ring atoms of Z4 being Z, Z41, Z42, Z44 and Z4. when Z4 is a 5-membered ring and Z, Z41, Z42, Z43, Z44 and Z45 when Z4 is a 6-membered ring, Z4@, Z41, Z42, Z43, Z44, and Z45, . being carbon, nitrogen, oxygen or sulfur, Z40 being the ring atom through which Z4 is attached to the heterocyclic core ring, Z41 and Z45 each being in an alpha position relative to Z42 and Z44 each being in a beta position relative to Z40, Z43 being in the gamma position relative to Z40 when Z4 is a 6-membered ring, Z4 having a substituent R42 covalently attached to Z42, and a second substituent bonded to one of Z41, Z43, Z44, or Z45, the substituent being R41 when bonded to Z41, the substituent being R43 when bonded to Z43, the substituent being R44 when bonded to Z44, and the substituent being R41 when bonded to Z45; R42 is amino; R41i R43, R44 and R4s are independently hydrogen, hydrocarbyl, substituted hydrocarbyl, heterocyclo, halogen, or a substituted or unsubstituted heteroatom selected from nitrogen, oxygen, sulfur and phosphorus, provided at least one of R41, R43i R44 or R45 is other than hydrogen; R70 and R80 are independently selected from the group consisting of hydrogen, halogen, amino, hydrocarbyl, substituted hydrocarbyl, aryl, wherein aryl is phenyl optionally substituted by hydroxy, amino, Cl-C. alkyl, or halogen provided that R70 is not present when X, is a bond and Rgo is not present when X8 is a bond; or R70 and R80, along with the ring atoms to which each is attached, form a 5-or 6-membered saturated ring; and n is 0 to 2.

Still a further embodiment provides compounds having formula (V) that are represented by formula (Va) wherein each of Zi, X7, X8, Z1, Z3, Z4, R70, R80 and n are as defined for compounds having formula (V).

In another embodiment, the compound represented by any of formulas (I)- (V) is selected from the group of compounds listed in Table 3 below. Certain compounds listed in Table 3 are pharmaceutically acceptable salts of compounds having any of formulas (I)- (V). By way of example, compound 78 has 1.6 molecules of C (O) OHCF3 salt per molecule of compound 78 and 0.3 molecules of OH2 per molecule of compound 78. By way of further example, compound 80 has 1 molecule of C (O) OHCF3 salt per molecule of compound 80.

TABLE 3 Compound Compound No. 1 NH2 N F N F u H "D nu ON NAH nu NH NHz N FF N H--kr 0 NH NH N O I/ Nay 3 NH2 F N F Nez 'YN FF H 0 ,-OYH Nu 0 NH 0 TABLE 3 Compound Compound No. 4 NH2 /I N \ \ F F t NH H--y 0 0 NH H Nu NH 5 NH2 N F N \ \ F Null H 0 N H D NH H 0"nu "0 N ( N--/, H F N S N H 0 NH 0 nu2 O-N TABLE 3 Compound Compound No. 7 NH2 N \ \ F N F NEZ N O nu 0 NH NHZ NHs NH2 N \ \ F )-, N'y') u NH / NU nu F F ZU Nez N N H-o °OW ON H NH2 TABLE 3 Compound Compound No. No. 10 F F F N NH2 N "N I N NUS \ A H t ! J O H I/iN nu2 11 NH2 F N I N H-I O N I 0 ''O nu2 TABLE 3 Compound Compound No. 12 NH2 H ì J il H 0 N H II OH NH "ces N OH NH 13 CF3 N NH2 I N N 0"'nu NH FOC O-N TABLE 3 Compound Compound No. 14 NH2 F N F N F N H O O N H NH2 neo "0 H 15 F F F '-F N NH2 I N H IN O 0 N H F F 4F 0 F- N HsN TABLE 3 Compound Compound No. 16 NH2 / I N F N F N C 0 ! ! H /N\/\ y NH2 9 NUA 17 F I I N No) N H ZON H I H O N Zu N 0 NO TABLE 3 Compound Compound No. 18 NH2 1,,", 0 N N I H N H OWN NU OH H N OH NH 19 NH2 F IF N N H H 'No N 0 NO TABLE 3 Compound Compound No. 20 NH2 N F I N F IF 0 N 0 O O N 21 NH2 NEZ N F F NEZ JE 21 NH2 F F N F H II " ! ! ! O N H N NHs 21 1 N I | F H<N TABLE 3 Compound Compound No. NH2 H X mN o N \ N I H N H N 0 N F NEZ F F F 23 Han \F F F N F I N F F N " ! ! O N O H NH2 A O O NHZ TABLE 3 Compound Compound No. 24 NH, if I H F J ) Y N 0 O N Nu2 O O NHZ O 25 NH, F N F F "ION --in H I) 0 \ N Nez TABLE 3 Compound Compound No. NHz N \ II I N 0 H 'PO) U H NU SOH NU 27 NH, OH N y I N 0 H II --, OH H H NH OH NH TABLE 3 Compound Compound No. 28 NH2 N \ O/ )-", N N H O 0 N H NU OH nu 2 9 NHZ F I F N F N 0 H H O 1 N H NE TABLE 3 Compound Compound No. 3 0 NHZ H AR tu 0 N O O N H NHZ ho H 31 nua H "/0 N O NHZ 0 ____y t4H2 0 O N H O NH2 O TABLE 3 Compound Compound No. 32 NHz H N N 0 N I N O 0 N H N 0 NU2 33 nu, I/N\FO I N H N H2 p 33 nu2 N \ CFg i N N H (I O O N H N NH2 TABLE 3 Compound Compound No. 34 NH2 34 NH2 O. ° ONY H H N N 0 ) YN H N 0 O N H N O NH 0 3 5 NHZ 0 N N )-"N N H 'Y N 0 O N H H \ N I \O N TABLE 3 Compound Compound No. 3 6 NHZ N CF3 )"."N N H H IN 0", N H /N-OCH3 HN-OCH3 37 NH2 N CF3 I N H 0 O N H /N-OS02CHg NHZ TABLE 3 Compound Compound No. 3 8 NH2 N CF3 "N'y N H O N H N0 Nu2 39 NH2 3 9 NHZ H ! ! J I N u N t N H N/ \O N OCH3-"/\ TABLE 3 Compound Compound No. 40 NH2 ° D X N I N H H (p O 0 N N 0 NEZ 41 nu2 N 41 NH2 N CF3 I N N H IN N O N OC3 \ N NO TABLE 3 Compound Compound No. 42 NH2 42 N ACF3 RAZ N H IN 0 0", N H H3 NHs NH2 N \ CFg I N 0 H II H ! H O N H N\O N 0 TABLE 3 Compound Compound No. 4 4 CFg N NH2 N O O N 0 0 N H H VS neo 45 cl3 N NH2 )-IN N H H IN N O N H H N zozo po TABLE 3 Compound Compound No. N » CF N CF3 I N H H in N H N H 0 40 HO 0 47 NU2 HA O RAZ ! ! J I N H N 0 Holz H NO N HO TABLE 3 Compound Compound No. 48 NH2 N CF3 I N H H in N OU NU NU H/ NH HO 4 9 NHZ Ihr N CF3 N H II zon O N H NO < HgCO O TABLE 3 Compound Compound No. 50 NH2 N n XCF3 I N N H IN N O N NU HO ho nu HO 51 NH2 N CF3 I N H 0 N H H N NEO N O O TABLE 3 Compound Compound No. 52 NH2 N F if H N H H O N NH N NH 53 NH, H H) ! "IN 0 H N-0 F O N FEZ F N-F FF N-O F TABLE 3 Compound Compound No. 54 NH2 H N N zon N 0 H H F O N H N F \ N F ZOZO N 0 F 55 nu2 N N )""N N 0 N H il Cl Ci H ci N CI N-O TABLE 3 Compound Compound No. 56 NH2 H N nor I N 0 I N O U F O N H F H N F \F N-0 57 NU2 H N N N O J N 0 zon H O N zon NHZ NU2 nez O TABLE 3 Compound Compound No. 5 8 NH2 H N N I N IO N H My O N I "N N 0 lu PO 1O 59 H N --Cbz 59 NH2 I N O N nor O O N I 0 NU2 nez 0 N TABLE 3 Compound Compound No. 60 NH2 N CF3 I N H O O N I H H O O ? O 61 NH2 N F F N F H H II N F O N I H /N F F N. O F F F TABLE 3 Compound Compound No. 62 NH2 N F N F F N F 0 H N F F F -0 F F IF F 63 NH2 N F Np F N) F F F 63 nu2 /I F F N F N H 0 O N I O H N ND ò>@ F 00 N HZ TABLE 3 Compound Compound No. 64 NHs N"Y CH I N FF H N H O N I H NH2 CH N 65 NH2 N F if N F H O O N I H NH2 F 0 Fuzz F F F F F TABLE 3 Compound Compound No. 66 NHs F N = NH2 0X N H 0 N NU2 Nu2 NEZ 67 nu2 NEZ III H 6 7 NHZ N if N F H II O O N I H NH2 N N~ F 0 TABLE 3 Compound Compound No. NH2 68 NH2 F If N F N H O O N I H NH2 H 0 69 NH2 69 NH I N F F \, F N F N ( H O O N I H N H 0 0 TABLE 3 Compound Compound No. 70 NH2 1 A X \, F H ! ! N H H O Nu 0 71 NHZ N O NH Q 71 / H 0 N F 0 H Nu H N 0 H ! ! cH2/\X D NHZ TABLE 3 Compound Compound No. 72 nu2 N I N F F N F u F H H O N H N OH NH 73 0 u Cl NH2 I N -lu H 0'') ß NH nu nu ON 1 TABLE 3 Compound Compound No. 74 NHZ F N F N ! ! Holy 0 0 NH / w'N F F F F F 7 5 H2N F 0 F O N N F 2 F OH N H H N F Y"--F H O O N H N F F H 0 F TABLE 3 Compound Compound No. 76 F--F I \ \ NH2 ZU H ! ! H il 0""nu nu cri N C I 77 NH, cri 77 nu2 H N O I N 0 O O N 0 0 zon /N NH2 TABLE 3 Compound Compound No. 78 nu2 F N +0. 3 OH2 ) V'N I N FF H O N I H NH 0 S zu F OH 1-1. 6F F nu2 F N +0. 25 OH2 I N FF N F 0 N H N 00 O N H in F O HN OH +1. 35 F F TABLE 3 Compound Compound No. 80 NH2 N F ( H N H IN O/ 0 N 0 F OH Os NEZ zou OU N F Hly i F 0 N F N ETOH No F-OH NH2 H \ H ! ! F OH v 3 F F 3 F/ TABLE 3 Compound Compound No. 82 NH2 N 0 F 0 Oh Oh N F N F 0 0/ O N H H 0 OH OH N F) ° NsOH OH F F 83 NH2 Ci N \ \ OH I N O zizi o/ NU2 H 0) JL N. N F-OH OH 1. 75 F"/ F TABLE 3 Compound Compound No. 84 NH2 FJX CI N NH2 F- F OU N 2. 3 N F N NU O N 0 NH HN O \ O 85 NH2 H \ N \ N ZON O O H I H N\/O \ Nu O ° ONY H H 0 NH 0 N 0 nu 0 F TABLE 3 Compound Compound No. 86 NH2 1 0 N NAY +0. 25 OH2 N H 0 F N H I N O NH O F OH +2. 2 F F nu2 N nay N \ \ N +0. 45 OH N N H H H NON O N Nu 0 NON +2. NH O F +2. 2 F F TABLE 3 Compound Compound No. S8 NHs 1 0 N nay H +0. 75 OH2 N 0 N H H H Nu N 0 NH S Non p NH S OH +2. 45 F F 89 nu2 1 0 N N ! ! H zon H 0 O N H H H non 0 NH 0 F--OH +2. 1 FUZZ F TABLE 3 Compound Compound No. 90 NH2 H '1 ° H---Y H N ICI je F-N H NH2 I N OH OH +2. 75 F F 91 NH2 I H N Holy I N O H O soh HN--, F-oh 0 F F OH F F TABLE 3 Compound Compound No. 92 NHs H NEZ N 0 +0. 7 OH2 N H tt ! O// H H 0 nu 0 O NH O PH +2. 15 F F 93 NH H ZIZI N 0 Holy 0 ICI 0 N H \/N O NHs 0 TABLE 3 Compound Compound No. 94 NH2 I OH OU N +0. 9 OH2 H N O +0. 9 ohm N NU CUL O O N H NH CI HN O \ OH +2. 05 F 95 +0. 05 OH2 9 5 +o. os oN2 NHZ +0. 05 OH2 H N F__ OH fez N O F H H p/OH/ O ORS N po H H 0 NH O TABLE 3 Compound Compound No. 96 +1. 3 OH2 NWz r o V NH2 0 H +1. 85 F OH N O F Zon H O O NU NU NH nu 97 O NHZ OH +1. 2 F H _ +1. 05 OHZ +1. 05 OU2 )-IN N 0 Oh 0 OH N /N\/0 NH2 0 TABLE 3 Compound Compound No. 98 0 NHZ ! ! ou zoo oh Fuzz OH N H tt ! N O N N, O 0 N Y NH2 0 99 NHZ 0 O N CFs N N CF3 2. 0 F3C OH N ICI H O N H NH2 oN N Fez TABLE 3 Compound Compound No. 100 NH2 I I N F I F N F H H 0 0', N 0 ° ON 0 H NHz o 0 . N""NH2 NH2 101 CF3 N NH2 I N N O H I H N CF3 caf3 /'CF3 N-O TABLE 3 Compound Compound No. 102 NH2 N F I F H F 0 u N H N-0 je % p \ 2. 1 °" F 103 nu, F 103 NHZ N F I F 0 N H O O N H 0X 0 NHs 0' Mass F F TABLE 3 Compound Compound No. 104 NH2 N F I F N F N H 0 OH 0, 1 H OU OH NHs 105 NH, N CF3 Y I N N H O N N \ N N/CFg O TABLE 3 Compound Compound No. NHs / \ F F N F Holy H O/ O N H 106 NH2 ) X 1. 3 F 107 NH2 \ F N F F N) F H H I H 0', N NH2 0 N Nez O F 1. 9 F OH// O F TABLE 3 Compound Compound No. 108 NH2 \ F F N F Own Ouzo O N H NA O 1. 3 F OH N"10 irk F'0--l 109 NH2 / N \ \ II O O IN O H 0 F Nu NH2 H NH2 N "OH TABLE 3 Compound Compound No. 110 0 NHZ FOC C''OH N CF3 O lu F3COH N 0 0 0 O, N H N FEZ NH2 NH2 111 NH2 O 1I F O-.-H OH F, 7 N F N in H--kr 0 0 N L A NrO X NH 0 TABLE 3 Compound Compound No. 112 N H N ""J )-IN N 0 1 r' O O N H ION F FEZ ( OH F F F OH F 113 F 113 O N \ O H NH2 2. 3 F-OH F I N F H H O O N H Nu NH HN 0 TABLE 3 Compound Compound No. 114 NH2 0 0 /O O N I N F OH F H zon y NH2 H NH2 N N', I / 115 o NHZ OH F F N OH N d O holy N 0 zon 0 H H H/I N O \ /\ Il NU O F TABLE 3 Compound Compound No. 116 0 NH2 F-- F OH F N OH N N H-lu O N H H N F-- OH OH NU F 117 F Zu 0 n A N NH2 2. 5F N F H O NU Han 0 nu 0 O TABLE 3 Compound Compound No. 118 0 OH /0 il JL l < NH2 2. 4 F X F'-- N F N 0 N F NU Nu F HN O \ O F 119 NHZ /O OH OH OH F F N) 0 p ci 0 ci NH O TABLE 3 Compound Compound No. 120 NH2 /O OH F OH 2. 25 F N 0 F N O/ N H I H Neo NH 0 121 NH2 N F-OH 2. 3 N) F H N H O/ O N I N o NH 0 TABLE 3 Compound Compound No. 122 NH2 \ \ O O N" n ! ! F 0 N H H N y 0 CC13 NH 0 123 NHZ H N I N O H H H) Y o H i I H N\/O \ O H H ZOU 2. 15 FX F TABLE 3 Compound Compound No. 124 NH2 F H zizi N N 0 ) Y O// O N H I N O OH NH O ZOU 2v F F 125 NH2 O OU - 125 NH, 2. 4 OH N O F F --in H H XSOH N Fi \ I N O H O Ny 0 TABLE 3 Compound Compound No. 126 NH2 N H N ZON 0 Neo Ide Zu NH2 O 127 nu, I H 0 N F OH N N,, F ""6y ou OU H OH zu NHs TABLE 3 Compound Compound No. 12 8 NH2 I N O N n ! ! O N H N --CFs Nô 129 NH2 I oh N H ! ! N O 0 N O/ 0 N H O \ N I ii --CFs 1. 3 F F TABLE 3 Compound Compound No. 130 NHs \ O I N O F 'OH N 1NA 1X )-", F O N 0 F N nu2 *"r 0 131 p 131 0 H2 F-oh F"-rK 0 H H I N ZON O Neo hi/I N 0 NH 0 TABLE 3 Compound Compound No. 132 NH2 1 0 N ° ON H H N 3 F OH F N OH F N O/ O N H I H Neo Nu in 133 nu2 1 0 H ! ! n N F H 0 ON O N N Oye NH2 0 TABLE 3 Compound Compound No. 134 NH2 N 0 0 N 2. 3 F OH N 1, F H ! ! F O may Nl-rNy 0 /N\/O NHZ 0 135 NH2 H N Nez N N O- 0, N H 0 NH2 H NH2 2. 3 F'l OH OH F F TABLE 3 Compound Compound No. 136 NH2 F H \ I N \ O N 1. 65 F OH LT3 H F 0 OH H H Nu NH 0 137 0 Oh , N N 0 oh OH 0 N H OH NHs TABLE 3 Compound Compound No. 138 NH2 H NEZ "N % N O N o/ NH20 H II NHZ O 139 nu2 0 H ! ! F' N F NHZ 0 0 OH Oh O N OU NU2 OH nu2 NHs TABLE 3 Compound Compound No. 140 NH2 1 0 N O) t." I N H O/ N H I H 0 OH F \OH NH F F 141 NHZ Cl ou N H ! 0 N O/ O N 0 OH 1 F F TABLE 3 Compound Compound No. 142 NH2 CI ci I N O H 0 O N H 0 yo I I NH2 O 1. 4 F F H) t ! fuzz OU 143 nu2 N O 3 NH2 H 0 fi O F O N H I NH2 N O Y TABLE 3 Compound Compound No. 144 NH2 H N N N O Oh 0 OH OU FEZ F Nyo N p F F NH2 ° 145 NH2 /O H From N 0 2. 25 F n H j ! - a. 2s F/ I N F H ! ! j H O N H N p NH2 0 TABLE 3 Compound Compound No. -A AH H N N I N O ZON 147 NH, O NH2 0 H N O II NH O 14 7 ni2 I H N I \ 0 0') N H O O N H N O NHZ O TABLE 3 Compound Compound No. 148 NHz H N I N) 0 I N O ZON H H Neo NH 0 H I N NH O 149 NH2 H , N N N 0 IN O ZON Nu, 0 N O N po /N\/O \ NH2 O TABLE 3 Compound Compound No. iso 0 0 Han' Oh F N "N) yN I N 0 po Ni20 0 O N NHZ 0 \/N II O P NUS "Sr 151 ! NH2 N s NH » 2 ° F OH o F N I--, F N \ O 0 ZON zon 0 O N H O Let} R Zou F F TABLE 3 Compound Compound No. 152 o, JL L 152 0 NH2 F-OH 0 F"7)' F yl 0 N N 0 N) ZON P 153 nu, f 1 Fo OH NH2 ° ZOU F F 153 NH2 0 2. 6F OH N OH F :' N F N) H O N NH2 0 TABLE 3 Compound Compound No. 154 0 NHs ! ! NH2 Oh 2. 15 N 0 F N 0 LU N ici "oh NU OU nu2 N F-- 155 p O H N' F OH F I N OH N Zon OWN H N 0 y NHz 0 TABLE 3 Compound Compound No. 156 NH2 N N, 0 Zizi H I O yin 0 o N 1 H 0 NHs 0 2. 6 F X OH F F 157 NH2 N N) 0 N) y N zon O N N /N\/0 \ NHz 0 TABLE 3 Compound Compound No. 158 NHs N n ! ! N O N o/ O N 0 F F CF3 oh neo F 159 NH2 15 9 NH \ \ I N 0 N O/ 0 H H 0 nu2 F 2. 8 F OU F TABLE 3 Compound Compound No. 160 0 NH2 OH/I p F F I N \ \ O )-IN N N H O N H 0 NH2 OU, /OH F H'A NH2 F A 1 D o<NX F F -''Y H H t I N I/ N 0 y NH o OU N N"2/ OH N O \ 0 F O TABLE 3 Compound Compound No. 162 F \ F F N O H 0 O N H O i NHZ F OH I O F 0 O 163 NH2 N 0 0 N I 'OH 2. 6 F ZON O/ NU N--, OH NH2 N OH TABLE 3 Compound Compound No. 164 0 Nu2 ZOU 1. 85 F F N N 0 N O 0 Nu2 Ils, N y 0 nu2 165 0 "A i 165 p H N N H----If I F N O N. O N O O N H NH2 N OH TABLE 3 Compound Compound No. 166 0 Je NHZ Oh F F N OH zu N o/ 0 NU NHZ O F y OU F I I F O 167 NH2 CRI N \ OH I N. N N/4/U\oH 0 N H 0 0 0 F-OH NH2 0 Nu2 O OH F F TABLE 3 Compound Compound No. 168 NH2 H N N,,, : N N 0 H zon O N H < N n t N Il NHs 0 169 0 NH2 F F I OH N OH N H H 0', N H NH2 0 F N F F F TABLE 3 Compound Compound No. 170 NH2 OU N 0 N O H 0 N O N H NHg NY0 0 171 NH2 Oh N 1. 7 F OH H F H F O H H D 0 0 TABLE 3 Compound Compound No. 172 NH2 I OH 0 OU N 2. 55 F OH H F 0 O N H NH2 N OH X N X S F X 173 nu, OH 0 N N O F OH F Hz F O N 0 on dz N, o NO TABLE 3 Compound Compound No. 174 NH2 N N O N o/ 0 N Own /neo 0 3. 45 F\OH NH2 °Ph Oh F Ph oh N N--kr N 0 H N H H O N H INH 0 Nô F Ph NH O\ 3. 55 OH F Ph TABLE 3 Compound Compound No. 176 o NH2 OU F'rK 0 F N "'N I N) lit zon OWN Nu2 0 F OU F yo F 0 177 nu, OU 1 N 0 F O 17 7 0 Ou N 0 yin N O N N O O NH O OH 2. 4 Fuzz F TABLE 3 Compound Compound No. 178 0 NH2 Oh 178 O F N N N/% 1< r zon N ZON H TUT 0 O N F'lu F 0 O F I O OH F F O 179 NH2 F N F I N F N 0 H N F F F F F F F F TABLE 3 Compound Compound No. 180 NH2 I F N F H ! i N F 0 N O OF F F 181 NU2 F F F F F 181 NH2 H N \ \ N N N, __r I N 0 H 0 N O N OU2 OHZ \ NH2 O I F F O OH F F TABLE 3 Compound Compound No. 182 NH2 H ' N ! ! I N O N O/ O N H H OH2 0 N N F X +1. 2 F F 83 NH H \/N NU2 OH2 0 0 N 0 OU OH \ I O O N O L +1. 1 F F TABLE 3 Compound Compound No. 184 NH2 F N F F Holy H O N 11 NH2 nu2 F NI-I0 F--OH FRO F 185 nu, F I F F 18 5 NU2 H \ F I F N F N II O N H P N (X NEZ 0 OH F OH 'FI o N 0 TABLE 3 Compound Compound No. 186 ni2 F N F H t ! N F 0 N NU2 0 NHZ 'FIT nez F oh F I 0 18 7 F ° ; k I H/\XoNH2 N N H NU2 0 NEZ 0 1. 8 F OH F F F F TABLE 3 Compound Compound No. 188 NH2 / F , IrN F N F N ICI H Nu2 ! nu H NH2 O N 1. 8 F--OH FEZ F 189 nu2 O N \ \ CF3 F pH N F' F H Hua ZON H H N --o N--cl O TABLE 3 Compound Compound No. 190 NH2 O +1. 05 H H IF H-ly N H O/ NU2 0 NHs F F H F O OH +2. 15 F O''N F H 191 NH2 I N 1. 5 TFA N F F F I N F F 0 F H F O N H OH NH2 TABLE 3 Compound Compound No. 192 NH2 0 N N +1. 2 oh N 0 N H H N NH 0 nu O O fah +1. 95 F F 193 NH2 1 0 N nay n u H +1. 05 OH2 N O/ O N I H H 0 zu H H F\OH +1. 6 F F F TABLE 3 Compound Compound No. 194 AN NHs F F ( N F N F N F N ZON O/ zon NU O N NU2 i F-OU F" \ I F IF N H 0 O N H I H H H nu 9 L ZOU F F TABLE 3 Compound Compound No. 196 0 nu2 NH2 F F N F H t) lu I N Own H O 0 N H I N O F OH NH F F 197 NH2 ) 4jo N o/ H N H N OH 2 \H NH FEZ F F TABLE 3 Compound Compound No. 198 NHZ oh OU N 0 Hay 0 ICI o/ O N H I H has 2 F- OH NH F F F 199 0 NH2 F F OH QU "N N 0 I N O N O/ 0 H H H I H NOH F---K k NH F' F TABLE 3 Compound Compound No. 200 NH2 N I FI N) y N H fut O O N O H 201 NH2 NHz 201 NHs 201 NH2 OFF F FF H 0'N 0 H N H ! j NU2 H N NH2/ TABLE 3 Compound Compound No. 202 NH2 N CF3 N H) Y 0 N 0\ Han O N H I N F NH2 203 NH2 N/ N N N 0 lu") O N H N O N-H OU F O F 0 F-- F F TABLE 3 Compound Compound No. 204 ! 2 F F N F "N N F FF Her 0 N 0\ H N NH2 H I N NH 205 NH2 205 NHZ N N N O N II O 0 N H po NHs 0 TABLE 3 Compound Compound No. 206 NH2 H A'T H---if I N O N 0 NH20 H \/N II O \ NHZ O NUS H N N,,, : N O- H 0 O N H /N\/O NH2 O TABLE 3 Compound Compound No. 208 NH2 H N H) Y I N O H O/ O N H O N Ci Cil CI 209 \CI 1 1. 5 TFA N F I N H 0 F 0 N NUS NU2 N OH NH2 Any compound corresponding to any of formulas (I)- (V), having one or more prodrug moieties as part of the molecule, can be converted under physiological conditions to the biologically active drug by a number of chemical and biological mechanisms. In general terms, these prodrug conversion mechanisms are hydrolysis, reduction, oxidation, and elimination. For illustrative purposes, the following paragraphs detail prodrugs in which the prodrug moiety is covalently bonded to the amidine group on Z3 as depicted embodiments for each of formulas (I)- (V) above.

In one embodiment, conversion of the prodrug to the biologically active drug can be accomplished by hydrolysis of the prodrug moiety provided the prodrug moiety is chemically or enzymatically hydrolyzable with water. The reaction with water typically results in removal of the prodrug moiety and liberation of the biologically active drug. By way of example, a hydrolyzable prodrug derivative at the amidine group may be a carbonyl derivative such as N-acyl. Hydrolysis results in freeing the amidine group of the drug by removal of the acyl as carbon acid. Other suitable hydrolyzable prodrug derivatives include carbonyl, thiocarbonyl, imine, enamine, and oxygenated sulfur.

Yet another aspect of the invention provides, conversion of the prodrug to the biologically active drug by reduction of the prodrug moiety. Typically in this embodiment, the prodrug moiety is reducible under physiological conditions in the presence of a reducing enzymatic process. The reduction preferably results in removal of the prodrug moiety and liberation of the biologically active drug. An example of a reducible prodrug derivative at the amidine group is an oxygen containing group in which an oxygen is directly attached to the amidine. Reduction results in freeing the amidine group of the drug by removal of oxygen as water or an alcohol. Generally speaking, other suitable reducible prodrug derivatives include a nitrogen containing group, and a sulfur containing group, provided both nitrogen and sulfur are each preferably in their most reduced state.

In another embodiment, conversion of the prodrug to the biologically active drug can also be accomplished by oxidation of the prodrug moiety. Typically in this embodiment, the prodrug moiety is oxidizable under physiological conditions in the presence of an oxidative enzymatic process. The oxidation preferably results in removal of the prodrug moiety and liberation of the biologically active drug. An example of an oxidizable prodrug derivative at the amidine group is a hydrocarbyl containing unsaturation in the carbon beta to the carbon directly connected to the amidine group. Oxidation results in forming an oxygenated intermediate that breaks down, thereby freeing the amidine group of the drug with concurrent hydrolysis of the oxygenated hydrocarbyl residue. Other suitable oxidizable prodrug derivatives of the amidine include saturated hydrocarbyl, unsaturated substituted hydrocarbyl, aryl, and aralkyl.

A further aspect of the invention encompasses conversion of the prodrug to the biologically active drug by elimination of the prodrug moiety. Generally speaking, in this embodiment the prodrug moiety is removed under physiological conditions with a chemical or biological reaction. The elimination results in removal of the prodrug moiety and liberation of the biologically active drug. By way of example, an eliminateable prodrug derivative at the amidine group is a hydrocarbyl containing an unsaturated electron withdrawing group bonded to the carbon beta to the carbon directly connected to the amidine. More specifically, for illustration purposes and exemplification, the hydrocarbyl group could have a cyano . group beta to the carbon directly bonded to the amidino group. Elimination results in the freeing of the amidine group of the drug with concurrent removal of the unsaturated hydrocarbyl residue derived from the prodrug moiety. Other suitable eliminateable prodrug derivatives of the amidine include a hydrocarbyl substituted at the beta carbon with carbonyl, alkoxycarbonyl, amidocarbonyl, nitro, or sulfonyl or an alkyl group substituted with oxygen, nitrogen or sulfur at the carbon directly bonded to the amidine group.

Any compound of the present invention corresponding to formulas (I)- (V) may undergo any combination of the above detailed mechanisms to convert the prodrug to the biologically active compound. For example, a particular compound may undergo hydrolysis, oxidation, elimination, and reduction to convert the prodrug to the biologically active compound. Equally, a particular compound may undergo only one of these mechanisms to convert the prodrug to the biologically active compound.

The compounds of the present invention can exist in tautomeric, geometric or stereoisomeric forms. The present invention contemplates all such compounds, including cis- and trans-geometric isomers, E-and Z-geometric isomers, R- and S-enantiomers, diastereomers, d-isomers, 1-isomers, the racemic mixtures thereof and other mixtures thereof, as falling within the scope of compounds having any of formulas (I)- (V). Pharmaceutically acceptable salts of such tautomeric, geometric or stereoisomeric forms are also included within the invention. The terms"cis"and "trans", as used herein, denote a form of geometric isomerism in which two carbon atoms connected by a double bond will each have a hydrogen atom on the same side of the double bond ("sis") or on opposite sides of the double bond ("trans"). Some of the compounds described contain alkenyl groups, and are meant to include both cis and trans or"E" and"Z"geometric forms. Furthermore, some of the . compounds described contain one or more stereocenters and are meant to include R, S, and mixtures or R and S forms for each stereocenter present.

Also included in the family of compounds having any of formulas (I)- (V) are the pharmaceutically-acceptable salts thereof. The term"pharmaceutically-acceptable salt" embraces salts commonly used to form alkali metal salts and to form addition salts of free acids or free bases. The nature of the salt is not critical, provided that it is pharmaceutically acceptable. Suitable pharmaceutically- acceptable acid addition salts of the compounds may be prepared from an inorganic acid or from an organic acid.

Examples of such inorganic acids are hydrochloric, hydrobromic, hydroiodic, nitric, carbonic, sulfuric and phosphoric acid. Appropriate organic acids may be selected from aliphatic, cycloaliphatic, aromatic, araliphatic, heterocyclic, carboxylic and sulfonic classes of organic acids, examples of which are formic, acetic, propionic, succinic, glycolic, gluconic, lactic, malic, tartaric, citric, ascorbic, glucoronic, maleic, fumaric, pyruvic, aspartic, glutamic, benzoic, anthranilic, mesylic, salicylic, p-hydroxybenzoic, phenylacetic, mandelic, embonic (pamoic), methanesulfonic, ethylsulfonic, benzenesulfonic, sulfanilic, stearic, cyclohexylaminosulfonic, algenic, and galacturonic acid.

Suitable pharmaceutically-acceptable base addition salts of the compounds include metallic salts made from aluminum, calcium, lithium, magnesium, potassium, sodium and zinc or organic salts made from N, N'-dibenzylethyleneldiamine, choline, chloroprocaine, diethanolamine, ethylenediamine, meglumine (N-methylglucamine) and procain. All of these salts may be prepared by conventional means from the corresponding compound by reacting, for example, the appropriate acid or base with the selected compound of any of formulas (I)- (V).

The present invention also comprises a pharmaceutical , composition comprising a therapeutically-effective amount of the compound of the invention in association with at least one pharmaceutically-acceptable carrier, adjuvant or diluent. Pharmaceutical compositions of the present invention can comprise the active compounds of formulas (I)- (V) in association with one or more non-toxic, pharmaceutically-acceptable carriers and/or diluents and/or adjuvants (collectively referred to herein as"carrier" materials) and, if desired, other active ingredients. The active compounds of the present invention may be administered by any suitable route, preferably in the form of a pharmaceutical composition adapted to such a route, and in a dose effective for the treatment intended.

The active compounds and composition may, for example, be administered orally, intravascularly, intraperitoneally, subcutaneously, intramuscularly, oculary, or topically.

For treating ocular build up of fibrin, the compounds may be administered intraocularly or topically as well as orally or parenterally.

The compounds can be administered in the form of a depot injection or implant preparation which may be formulated in such a manner as to permit a sustained release of the active ingredient. The active ingredient can be compressed into pellets or small cylinders and implanted subcutaneously or intramusculary as depot injections or implants. Implants may employ inert materials such as biodegradable polymers or synthetic silicones, for example, silastic, silicone rubber or other silicon containing polymers.

Moreover, the compounds can also be administered in the form of liposome delivery systems, such as small unilamellar vesicles, large unilamellar vesicles and multilamellar vesicles. Liposomes can be formed from a variety of phospholipids, such as cholesterol, stearylamine or phosphatidylcholines.

The compounds may also be delivered by the use of monoclonal antibodies as individual carriers to which the compound molecules are coupled. The compounds may also be coupled with soluble polymers as targetable drug carriers.

Such polymers can include polyvinylpyrrolidone, pyran copolymer, polyhydroxy-propyl-methacrylamide-phenol, polyhydroxyethyl-aspartamide-phenol, or ployethyleneoxide- polylysine substituted with palmitoyl residues.

Furthermore, the compounds may be coupled to a class of biodegradable polymers useful in achieving controlled release of a drug, for example, polylactic acid, polyglycolic acid, copolymers of polylactic and polyglycolic acid, polyepsilon caprolactone, polyhydroxy butyric acid, polyorthoesters, polyacetals, polydihydropyrans, polycyanoacrylates and cross linked or amphitpathic block copolymers of hydrogels.

For oral administration, the pharmaceutical composition may be in the form of, for example, tablets, capsules (each of which includes sustained release or timed release formulations), pills, powders, granules, elixers, tinctures, suspensions, liquids including syrups, and emulsions. The pharmaceutical composition is preferably made in the form of a dosage unit containing a particular amount of the active ingredient. Examples of such dosage units are tablets or capsules. The active ingredient may also be administered by injection as a composition wherein, for example, saline, dextrose or water may be used as a suitable carrier.

The amount of therapeutically active compounds which are administered and the dosage regimen for treating a disease condition with the compounds and/or compositions of this invention depends on a variety of factors, including the age, weight, sex and medical condition of the subject, the severity of the disease, the route and frequency of administration, and the particular compound employed, and thus may vary widely.

The pharmaceutical compositions may contain active . ingredients in the range of about 0.1 to 2000 mg, and preferably in the range of about 0.5 to 500 mg. A daily dose of about 0.01 to 100 mg/kg body weight, and preferably between about 0.5 and about 20 mg/kg body weight, may be appropriate. The daily dose can be administered in one to four doses per day.

The compounds may be formulated in topical ointment or cream, or as a suppository, containing the active ingredients in a total amount of, for example, 0.075 to 30% w/w, preferably 0.2 to 20% w/w and most preferably 0.4 to 15% w/w. When formulated in an ointment, the active ingredients may be employed with either paraffinic or a water-miscible ointment base.

Alternatively, the active ingredients may be formulated in a cream with an oil-in-water cream base. If desired, the aqueous phase of the cream base may include, for example at least 30% w/w of a polyhydric alcohol such as propylene glycol, butane-1, 3-diol, mannitol, sorbitol, glycerol, polyethylene glycol and mixtures thereof. The topical formulation may desirably include a compound which enhances absorption or penetration. of the active ingredient through the skin or other affected areas. Examples of such dermal penetration enhancers include dimethylsulfcxide and related analogs. The compounds of this invention can also be administered by a transdermal device. Preferably topical administration will be accomplished using a patch either of the reservoir and porous membrane type or of a solid matrix variety. In either case, the active agent is delivered continuously from the reservoir or microcapsules through a membrane into the active agent permeable adhesive, which is in contact with the skin or mucosa of the recipient. If the active agent is absorbed through the skin, a controlled and predetermined flow of the active agent is administered to the recipient. In the case of microcapsules, the encapsulating agent may also function as the membrane.

The oily phase of the emulsions of this invention may be constituted from known ingredients in a known manner.

While the phase may comprise merely an emulsifier, it may comprise a mixture of at least one emulsifier with a fat or an oil or with both a fat and an oil. Preferably, a hydrophilic emulsifier is included together with a lipophilic emulsifier which acts as a stabilizer. It is also preferred to include both an oil and a fat. Together, the emulsifier (s) with or without stabilizer (s) make-up the so-called emulsifying wax, and the wax together with the oil and fat make up the so-called emulsifying ointment base which forms the oily dispersed phase of the cream formulations. Emulsifiers and emulsion stabilizers suitable for use in the formulation of the present invention include Tween 60, Span 80, cetostearyl alcohol, myristyl alcohol, glyceryl monostearate, and sodium lauryl sulfate, among others.

The choice of suitable oils or fats for the formulation is based on achieving the desired cosmetic properties, since the solubility of the active compound in most oils likely to be used in pharmaceutical emulsion formulations is very low. Thus, the cream should preferably be a non-greasy, non-staining and washable product with suitable consistency to avoid leakage from tubes or other containers. Straight or branched chain, mono-or dibasic alkyl esters such as diisoadipate, isocetyl stearate, propylene glycol diester of coconut fatty acids, isopropyl myristate, decyl oleate, isopropyl palmitate, butyl stearate, 2-ethylhexyl palmitate or a blend of branched chain esters may be used. These may be used alone or in combination depending on the properties required. Alternatively, high melting point lipids such as white soft paraffin and/or liquid paraffin or other mineral oils can be used.

For therapeutic purposes, the active compounds of the present invention are ordinarily combined with one or more . adjuvants appropriate to the indicated route of administration. If administered per os, the compounds may be admixed with lactose, sucrose, starch powder, cellulose esters of alkanoic acids, cellulose alkyl esters, talc, stearic acid, magnesium stearate, magnesium oxide, sodium and calcium salts of phosphoric and sulfuric acids, gelatin, acacia gum, sodium alginate, polyvinylpyrrolidone, and/or polyvinyl alcohol, and then tableted or encapsulated for convenient administration. Such capsules or tablets may contain a controlled-release formulation as may be provided in a dispersion of active compound in hydroxypropylmethyl cellulose. Formulations for parenteral administration may be in the form of aqueous or non-aqueous isotonic sterile injection solutions or suspensions. These solutions and suspensions may be prepared from sterile powders or granules having one or more of the carriers or diluents mentioned for use in the formulations for oral administration. The compounds may be dissolved in water, polyethylene glycol, propylene glycol, ethanol, corn oil, cottonseed oil, peanut oil, sesame oil, benzyl alcohol, sodium chloride, and/or various buffers. Other adjuvants and modes of administration are well and widely known in the pharmaceutical art.

As a further embodiment, compounds having formula (I)- (V) or a pharmaceutically-acceptable salt thereof comprise a treatment and prophylaxis for thrombotic events resulting from coronary artery disease, cerebrovascular disease and other coagulation cascade related disorders in a subject.

The treatment comprises administering to the subject having such disorder a therapeutically-effective amount of compounds having formulas (I)- (V) or a pharmaceutically- acceptable salt thereof.

In another aspect of the invention, the compounds or a pharmaceutically-acceptable salt thereof can also be used whenever inhibition of blood coagulation is required such as to prevent coagulation of stored whole blood and to prevent coagulation in other biological samples for testing or storage. Thus coagulation inhibitors of the present invention can be added to or contacted with stored whole blood and any medium containing or suspected of containing plasma coagulation factors and in which it is desired that blood coagulation be inhibited, e. g. when contacting the mammal's blood with material selected from the group consisting of vascular grafts, stents, orthopedic prothesis, cardiac prosthesis, and extracorporeal circulation systems.

Compounds of Formula (I)- (V) are capable of inhibiting activity of serine proteases related to the coagulation cascade. Thus, these compounds could be used in the manufacture of a medicament as a method for the prophylactic or therapeutic treatment of diseases mediated by coagulation cascade serine proteases, such as inhibiting the formation of blood platelet aggregates, inhibiting the formation of fibrin, inhibiting thrombus formation, and inhibiting embolus formation in a mammal, in blood, in blood products, and in mammalian organs. The compounds also can be used for treating or preventing unstable angina, refractory angina, myocardial infarction, transient ischemic attacks, atrial fibrillation, thrombotic stroke, embolic stroke, deep vein thrombosis, disseminated intravascular coagulation, ocular build up of fibrin, and reocclusion or restenosis of recanalized vessels in a mammal. Moreover, the compounds also can be used to study the mechanism of action of coagulation cascade serine proteases to enable the design of better inhibitors and development of better assay methods. The compounds would be also useful in prevention of cerebral vascular accident (CVA) or stroke.

In practicing the methods of the present invention for the treatment and prevention of a variety of thrombotic conditions including coronary artery and cerebrovascular disease, the compounds and pharmaceutical compositions are . administered alone or in combination with one another, or in combination with other therapeutics or in vivo diagnostic agents. In another aspect, the compounds can also be co-administered with suitable anti-platelet agreggation agents, including, but not limited to aspirin, ticlopidine, or clopidrogel, fibrinogen receptor antagonists (e. g. to treat or prevent unstable angina or to prevent reocculsion after angioplasty and restenosis), anti-coagulants such as aspirin, warfarin or heparins, thrombolytic agents such as plasminogen activators or streptokinase to achieve synergistic effects in the treatment of various pathologies, lipid lowering agents including antihypercholesterolemics (e. g. HMG CoA reductase inhibitors such as mevastatin, lovastatin, simvastatin, pravastatin, and fluvastatin, HMG CoA synthatase inhibitors, etc. ), anti-diabetic drugs, or other cardiovascular agents (e. g. loop diuretics, thiazide type diuretics, nitrates, aldosterone antagonistics (e. g. spironolactone and epoxymexlerenone), angiotensin converting enzyme (e. g. ACE) inhibitors, angiotensin II receptor antagonists, beta-blockers, antiarrythmics, anti- hypertension agents, and calcium channel blockers to treat or prevent atheriosclerosis. By way of example, patients suffering from coronary artery disease, and patients subjected to angioplasty procedures, would benefit from coadministration of fibrinogen receptor antagonists and coagulation cascade inhibitors of the present invention.

Also, coagulation cascade inhibitors could enhance the efficiency of tissue plasminogen activator-mediated thrombolytic reperfusion.

Typical doses of compounds of the present invention with other suitable anti-platelet agents, anticoagulation agents, cardiovascular therapeutic agents, or thrombolytic agents may be the same as those doses of coagulation cascade inhibitors administered without coadministration of additional anti-platelet agents, anticoagulation agents, , cardiovascular therapeutic agents, or thrombolytic agents, or may be substantially less than those doses of coagulation cascade inhibitors administered without coadministration of additional anti-platelet agents, anticoagulation agents, cardiovascular therapeutic agents, or thrombolytic agents, depending on a patient's therapeutic needs.

The present methods preferably employ prodrug compounds that when converted to the biologically active compound selectively inhibit human TF-VIIA over the inhibition of both human Thrombin II and human factor Xa.

Preferably, the compounds have a human TF-VIIA ICso of less than 0.5 mM and also have a selectivity ratio of TF-VIIA inhibition over both human Thrombin II and human factor Xa inhibition of at least 10, and more preferably at least 100. Even more preferably, the compounds have a human TF- VIIA ICgoof less than 0.1 mM and also have a selectivity ratio of TF-VIIA inhibition over both human Thrombin II and human factor Xa inhibition of at least 1000, and most preferably at least 10,000.

All mentioned references are incorporated by reference as if here written.

Although this invention has been described with respect to specific embodiments, the details of these embodiments are not to be construed as limitations. The following examples are provided to illustrate the present invention and are not intended to limit the scope thereof.

Without further elaboration, it is believed that one skilled in the art can, using the preceding descriptions, utilize the present invention to its fullest extent.

Therefore, the following preferred specific embodiments are to be construed as merely illustrative and not limitative of the remainder of the disclosure in any way whatsoever.

Compounds containing multiple variations of the structural modifications illustrated in the schemes or the following Examples are also contemplated. Those skilled in the art . will readily understand that known variations of the conditions and processes of the following preparative procedures can be used to prepare these compounds.

One skilled in the art may use these generic methods to prepare the following specific examples, which have been or may be properly characterized by 1H NMR, mass spectrometry, elemental composition, and similar procedures. These compounds also may be formed in vivo.

The following examples contain detailed descriptions of the methods of preparation of compounds having each of formulas (I)- (V). These detailed descriptions fall within the scope and are presented for illustrative purposes only and are not intended as a restriction on the scope of the invention. All parts are by weight and temperatures are Degrees centigrade unless otherwise indicated.

GENERAL SYNTHETIC PROCEDURES AND SPECIFIC EXAMPLES The compounds of the present invention can be synthesized, for example, according to the following procedures and Schemes given below.

Abbreviations used in the schemes and tables include: "AA"represents amino acids,"AcCN"represents acetonitrile,"AcOH"represents acetic acid,"BINAP" represents 2, 2'-bis (diphenylphosphino)-1, 1'-binaphthyl, "BnOH"represents benzyl alcohol,"BnCHO"represents 2- phenylethanal,"BnSO2Cl"represents benzylsulfonyl chloride, "Boc"represents tert-butyloxycarbonyl,"BOP" represents benzotriazol-1-yl-oxy-tris-(dimethylamino),"bu" represents butyl, "dba"represents dibenzylidene-acetone, "DCC"represents 1,3-dicyclohexylcarbodiimide,"DCM" represents dichloromethane or methylene chloride,"DIBAH" or"DIBAL"represents diisobutylaluminum hydride,"DIEA" represents diisopropyl ethylamine,"DMF"represents dimethylformamide, "DMSO"represents dimethylsulfoxide, "DPPA"represents diphenylphosphoryl azide","EDC"or "EDCI"represents 1- [3- (dimethylamino) propyl]-3- . ethylcarbodiimide hydrochloride,"Et2O"represents diethyl ether, "Ex. No. "represents Example Number,"'FNMR" represents fluorine NMR,"Fmoc"represents 9- fluorenylmethoxycarbonyl," (MeOD)"represents proton NMR taken in deuterated methanol,"HOBt"represents hydroxybenzoltriazole","LDA"represents lithium diisopropylamide, "MW"represents molecular weight,"NMM" represents N-methylmorpholine,"NMR"represents nuclear amgnetic resonance, "Ph"represents phenyl or aryl,"PHTH" represents a phthaloyl group, "pnZ"represents 4- nitrobenzyloxy-carbonyl,"PTC"represents a phase transfer catalyst, "py"represents pyridine,"R"represents a hydrocarbyl or a substituted hydrocarbyl,"RNH2" represents a primary organic amine,"SEM"represents 2- (trimethylsilyl) ethoxy-methyl chloride,"p-TsOH" represents paratoluenesulfonic acid,"TBAF"represents tetrabutylammonium fluoride,"TBTU"represents 2- (1H- benzotriozole-1-yl)-1, 1, 3,3-tetramethyl uronium tetrafluoroborate,"TEA"represents triethylamine,"TFA" represents trifluoroacetic acid,"THF"represents tetrahydrofuran, "TMS"represents trimethylsilyl,"TMSCN" represents trimethylsilyl cyanide, and"Cbz"or"Z" represents benzyloxycarbonyl, "X"represents a halogen and typically is a bromine or chlorine. As used in the schemes and examples, Z1, Z3, Z4, R44, R80, R301, R302, R303, R304, R305/ R306, R308, R309, R310, R311, and X7, along with any other variable depicted, encompasses every group described for each particular variable for each embodiment of compounds having formulas (I)- (V) as detailed herein.

A specific synthetic process, useful in the preparation of many of the heterocyclic compounds of the present invention, is the arylation or heteroarylation of an intermediate compound characterized by having a suitable leaving group on a sp2 hybridized carbon of a heterocyclic ring. In the product of the reaction, the leaving group is replaced by an aryl group or a heteroaryl group. Suitable leaving groups for the reaction include chloro, bromo, iodo, methylthio, triflates and other similar groups. The heterocyclic ring with the leaving group will typically have an acetic acid group or a derivative thereof bonded to a ring atom alpha to the bromo and a substituted or unsubstituted amino group bonded to a ring atom that is both beta to the carbon having the acetic acid group and gamma to the carbon ring atom substituted with bromo. The aryl group that is reacted at the spl hybridized carbon is generally an aryl boronic acid or an ester of the aryl boronic acid; similarly, heteroaryl boronic acids or esters of these boronic acids can be used in the same manner as aryl boronates. The aryl and heteroaryl boronates may be substituted or unsubstituted. The aryl or heteroaryl becomes bonded to the sp hybridized carbon at the point at which the boron was attached to the aryl or heteroaryl ring. Aryl and heteroaryl organoSn compounds can also be used instead of the corresponding boronates.

Suitable reaction conditions for carrying out this transformation include: 1. Pd [P (phenyl) 3] 4, 2M Na2CO3, 60-75°C, dimethoxyethane (DME), H2O, N2 ; 2. Pd [P (phenyl) 3] 4, Cs2CO3, dioxane, 100°C ; 3. Pd [P (phenyl) 3],, Cu (I)-2-thiophenecarboxylate, 70-75°C, anhydrous THF, argon; and 4. Z4 [Sn (n-butyl) 3], Pd [P (phenyl) 3] 4, LiCl, anhydrous dioxane, 85°C, argon or N2.

The organo palladium (Pd [P (phenyl) 3] 4) compound is used catalytically in a ratio of 1 to 40 mole percent. The carbonate base is normally used in an excess of 1.2 to 2 molar equivalents. Suitable solvents include dimethoxyethane (DME), dioxane, 1-propanol, and tetrahydrofuran. The temperature of the reaction is normally in the range of from about 50 to 100°C.

Cu (I) -2-thiophenecarboxylate (Cu (I) -TC) is normally used in a mole percent of 110-150.

, Scheme 1 and Example 1 show specific applications of this specific synthetic process. Procedures for preparing the intermediate heterocyclic or cycloalkenyl ring compounds having a suitable leaving group on sp2 hybridized carbon and useful as suitable intermediates in this specific synthetic process are given in the schemes and examples listed above.

Scheme 8 illustrates a general synthetic process for substitution at a nitrogen of the heterocyclic ring. The synthetic process applies whether the ring is 5-or 6- membered.

The compounds of the present invention may be synthesized in accordance with one or more of the following schemes: Scheme 1 : , Br Pd (PPh3) 4 I CS2CO3 N dioxane N z Z4B (OR) 2 H 0 NHZ R304 R305 H2N N R304 N"'Y'Z I""R44 + H2N R305 H R307 0 0 O TBTU, DMF DIEA NH2 N R44 NH2 ! NHzOH See Page 215 \N R3oa 9 H 0 R305 H H I R307 R307 Scheme 1 : (continued from page 214) NH2 N \ a4 N N vR44 H R301 0 N H R311C (O) x R306 See Page R307 NH2 217 1 R308R3o9C (oR) 2 t f NH2 N R44 R31OX r\3ioA See Page 216 H 0 R305 0 N H O N N R# Rsoe l R308 R308 R309 Scheme 1 : (continued from page 215) Scheme 1 : (continued from page 215) Scheme 2a: Scheme 2b: Scheme 2c: Scheme 3: R304 R305 NH (Boc) 2N NH2 R306 R307 NH2R3< \tBASE EtOH/\ R304 R305 R304 R305 N-R301 N- (CO) R311 (Boc) 2N NH2 (Boc) zN NH 2 R306 R307 R306 R307 acid acid i f R304 R305 N-so R304 R305 H2N NH2 N- (CO) R311 R306 R307 HZN /NH2 R306 R307 Scheme 4: R304 R305 N-OH (Boc) 2N NH R306 R307 . X \nC (0) X 311C (O) X R3oaRsosCR) R304 R305 s N O (cO) R311 R304 R305 (Boc) 2N ~ NH2 2 N--o R306 R307 (S, C)-R308 (Boc) 2N N"\ R ors R306 R307 acid acid If R304 R305 Nez >X N o R304 R305 \ N-O (CO) R311 R306 R307 H2N NH2 R306 R307 Scheme 5: Scheme 6 : R304 F NC CN Reduction \reds R306 R307 R304 F CN H2N R306 R307 \NH20H NaOA NH20H R304 OAc Nos NON CN H2N H2 NH2 R306 R307 R306 R307 1) hydrolysis 2) NH20H R304 OH NOH H2N H2 R306 R307 Scheme 7: R304 F >4 1) HON=C (CH3) 2 2) hydrolysis / R3os'R3o7 R304 nu \/NH ) =S I POCI3 > POC13 R304 0 >=< V NH20H =t Cl /\ /\ I POCts R306 R307 R304 N NH20H ci R306 R307 R304 N NUBS NOS R306 R307 R304 0 HN (Boc) 2- _ NHOH base See Page 226 R306 R307 Scheme 7: (continued from page 225) R304 ON 0 (Boc) 2N \NHOH R306 R307 308309 (0 ?) \. \acid RsosR3osCR) 2 cid R3seR X R I, 309 304 0 1/ (Boc) 2N O H2N \N 0 H2N R306 R307 R306 R307 acid R30 , 309 "/N. cr H2N N \o zon han R306 R307 Scheme 8: 02N R44 N H2N H2 cru20 Br 02N \ R44 1) methyl N-Boc-qiycinate 2) HCI NHNH2 02N o/wz R44 carbonyl 0 diimidazole H2N t4H N H N02 0 oxidation HN N R44 See Page 228 nu i o Scheme 8: (continued from page 227) N02 0 t-butyl chloroacetate N N \ R44 I NU 0 0 N02 IN N 0 C02tBu Scheme 9: 0 0 o ammonium-2-nitroacetamide, o Boc Boc J-'Cn ? C) ? N oh 0 Boc \ 4 DIBAL/DCM 02N 1 H 0 - 0 Boc 02N < zon ON OCH3 OH Boc s < 14 COCl2 > JET XI UMSO N On See Page 230 OCH3 Scheme 9 : (continued from page 229) B1 rio BOUC Oh/-4 I ohsr N 02N (CH3CH0) 3P t f Z, XR80 O/\P (O) (OCH2CH3) 2 0 Boc H2, Pd/C N Ozon OCH3 Boc But'3 R80 4 See Page 231 N H OCH3 Scheme 9 : (continued from cage 230) Boc Boc Zi N ri 1 NH nu Il N o 1. NaH 2. BrCH2C (O) NH-Z3-Cb NaH THF ^ Boc Br C02-t-Bu Boc R80 O Cbz I oc 1 H p Rao 4 O 1. H2, PdIC H H 2. TFA H I I o 0 z4 O 1. Deprotection TFA zon coupling agent N H H R80 Z4 H2, PdIC 0 Z9 N N/ H H H 0 H H 0 Scheme 10 : 0 0 ammonium 2-nitroacetamide, zu Cbz Cbz HO 1-4 POC13 Acetonitrile TEA 02NaH O 0 Cbz I ci/-4 NaH/THF Br/\C02-t-Bu 02NaH 0 Cbz R8o Ho 1-4 plus Base I N O O 02N"""o-t-Bu \/See Page 233 u Scheme 10: (continued from page 232) Cbz Rso I o TFA/H20 ZI 0 TFA/H20 O O 02N 0-t-Bu O Cbz Rso x L4 H2, Pd/C Zl 0 VU 0 u O R80xZ4 1. Deprotection TFA 2. NH2-Z3-Cbz, Coupling Agent ZIP OH H R80xZ4 R8° X7 Za O H2, Pd/C Z-Cbz o 0 H I H H H Rso X7 O Z3 H H 0 O Examples Example 1 N-isopropylaminopyrazine Example la A solution of 2-chloropyrazine (750 g, 6.55 mol) and isopopylamine (2 L, 23.45 mol) was heated to 130° C in a pressure reaction flask under 100 psi nitrogen with stirring for 24 hours. The reaction mixture was allowed to cool and diluted with 1 L methanol followed by 4 L of ethyl acetate and 4 L of water. The organic layer was separated and the aqueous solution was extracted with 2L of ethyl acetate. The combined organic solutions were washed with 2L of water, dried over magnesium sulfate, filtered, and concentrated. The crude product afforded a melting point of 46. 3° C.

2- (N-isopropylamino)-3, 5-dibromopyrazine Example lb To a solution of N-isopropylaminopyrazine (514 g, 3.747 mol) in 5. 14 L dimethyl sulfoxide and 202 mL water over 30 minutes with the temperature being kept between 40-50°C by the addition rate was added N- bromosuccinimide (1.866 kg, 11.24 mol). After the addition was completed the reaction mixture was allowed to cool followed by stirring at ambient temperature for 24 hours.

An aqueous workup afforded the product as a black oil.

5-Bromo-2- (N-isopropylamino)-3-hydroxypyrazine Example lc To a suspension of 2- (N-isopropylamino)- 3,5-dibromopyrazine in water was added potassium hydroxide in water. The resulting suspension was heated to reflux for approximately 18 hours to afford the 5-Bromo-2- (N- isopropylamino)-3-hydroxypyrazine.

6-Bromo-l-t-butoxycarbonylmethyl-3- (N- isopropylamino) pyrazinone Example ld To 3.3 L tetrahydrofuran was added 5- bromo-2- (N-isopropylamino) -3-hydroxypyrazine (600 g, 2.585 mol) and potassium t-butoxide (365.8 g, 3.1 mol). The resulting suspension was heated at 60 °C for 1 hour. A solution of tert-butyl bromoacetate (605.15 g, 3.1 mol) was then added to the mixture. This mixture was heated at 60 °C for four hours and then allowed to stand at room , temperature overnight. The mixture was then diluted with 2.5 L of water and 2.5 L of ethyl acetate. The organic layer was washed with 2.5 L brine. The organic solution was dried over magnesium sulfate, filtered, concentrated, triturated with hexanes and filtered to afford 573 g of an off-white solid.

3- (4, 4,5, 5 tetramethyl-l, 3,2-dioxaborolan-2-yl)-5- (trifluoromethyl) aniline Example le To a 100 ml, 3 neck, round bottom flask, under nitrogen, magnetic stirrer, cold water condensor, heating mantel, and thermocouple was added 3-amino-5- bromobenzotrifluoride (1.0 g, 4.17 mmol), N, N-dimethyl formamide (50 ml, 645.7 mmol), Bis (pinacolato) diboron (1.06 g, 4.17 mmol) and stirred for one hour while nitrogen was bubbled through the reaction mixture. To the reaction mixture potassium acetate (1.23 g, 12.50 mmol) was added with continued stirring for 30 minutes. To the reaction mixture [1, 1'-Bis (diphenylphosphino)-ferrocene], dichloropalladium (II) complex with dichloromethane (1 : 1) (0.102 g, 0.125 mmol) was added. The nitrogen purge was discontinued. The reaction was slowly warmed to 84°C and maintained at that temperature for 16 hours. TLC in 50 ethyl acetate/50 hexane, developed in iodine and LCMS indicated the presence of product. The reaction mixture was allowed to cool to room temperature. The reaction mixture was diluted with ethyl acetate and washed with 3 x 100 ml of brine. The organic layer was dried over . magnesium sulfate, filtered through a silica plug, and concentrated to give 2.04 g of a black oil. 1H NMR indicated desired product and N, N-dimethyl formamide. The crude black oil was dissolved in diethyl ether and was washed with 3 x 100 ml of water, dried over magnesium sulfate, filtered, and concentrated to give 1.05 g (88%) of a brown oil.

LCMS (0-95 acetonitrile, in 10 min): 6.98 min.

Mass spec: M + H = 288.

NMR (400 MHz, CDC13) : 1H õ 1.325 ppm (12 H, s), 3.797 ppm (2 H, broad s), 6.966 ppm (1 H, s), 7.252 ppm (1 H, s), 7. 428 ppm (1 H, s); 19F-63. 190 ppm (3 F, s). tert butyl [6- [3-amino-5- (trifluoromethyl) phenyl]-3- isopropylamino)-2-oxopyrazin-1 (2H) -yl] acetate Example lf To a 250 ml, 3 neck, round bottom flask, under nitrogen, magnetic stirrer, cold water condensor, and heating mantel was added the 3- (4, 4, 5, 5 tetramethyl-1, 3, 2- dioxaborolan-2-yl)-5- (trifluoromethyl) aniline from Example la, (2. 0 g, 6.97 mmol), tert butyl [6-bromo-3- (isopropylamino)-2-oxopyrazin-1 (2H)-yl] acetate (2.16 g, 6. 25 mmol), and dioxane (100 ml, 1. 17 mol). To the reaction mixture Cesium carbonate (2.44 g, 7.5 mmol) and tetrakis (triphenylphosphine) palladium (0) (1. 0 g, 0. 865 mmol) were added and warmed to reflux for 15 hours. TLC in 50 ethyl acetate/50 hexane, developed in iodine and MS indicated the presence of product. The reaction mixture , was allowed to cool to room temperature, filtered, and washed with 2 x 100 ml of ethyl acetate. The organic layers were combined, dried over magnesium sulfate, filtered and concentrated to give 5. 24, g of a reddish black oil. The crude product was then chromatographed on silica, eluded with 5% ethanol/95% dichloromethane, 25 ml fractions. Desired product was isolated in fractions 40- 45.1. 53 g (57%) of a pale orange whitish solid was recovered.

Mass spec: M + H 427.

NMR (400 MHz, CDC13) : 1H 5 1. 265 ppm (6 H, d), 1.413 ppm (9 H, s), 3.988 ppm (2 H, broad s), 4.178 ppm (1 H, m), 4.349 ppm (2 H, s), 6.105 ppm (1 H, broad s), 6.743 (1 H, s), 6.772 ppm (1 H, s), 6.898 ppm (1 H, s), 6.921 ppm (1 H, s) ; 19F 5 63.418 ppm (3 F, s).

Example lg 2.6 g (6. 1 mmol) of the product of Example If was hydrolyzed with stirring in 15 mL TFA for 90 minutes.

The solvent was evaporated and the residue was redissolved in EtOAc, which was then evaporated to dryness. Yield: 2.9 g (6. 0 mmol ; 98%) solid form.

Mass spec: M + H = 371.4 Example Ih 3.32 g (10 mmol) N, N-di-Boc-4- aminobenzonitrile was deprotected in 50 mL CH2C12/TFA (4: 1) for 30 minutes and the solvent was evaporated thoroughly to dryness. 2.9 g (6. 0 mmol) of the product of Example lg was coupled with the 4-aminobenzonitrile in 40 mL DMF in the presence of 2.25 g (7 mmol) TBTU and 3.5 mL (20 mmol) DIPEA with stirring for 12 hours. The DMF was evaporated and the product was precipitated by addition of 200 mL water and filtered. Yield: 2.2 g (4.5 mmol; 76%) white solid.

Mass spec: M + H = 485.3 Example 1 2.2 g (4.5 mmol) of the product of Example 1h was dissolved in 50 mL EtOH. 1.44 g (20 mmol) hydroxylamine HC1 and 4.4 mL (25 mmol) DIPEA were added to the solution and the mixture was refluxed for 3 hours. The EtOH was then evaporated and the product was precipitated by addition of 200 mL water. The product was filtered and dried. The crude product (1.1 g) was purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the title product at 33% AcN, 1.1 g (67%) white solid.

Mass spec: M + H = 518.3 1H NMR: 300 MHz, CD30D : 5 7.66-7. 61 (d, 2H), 7.47-7. 42 (d, 2H), 7.02 (s, 1H), 6.90-6. 85 (d, 2H), 6.68 (s, 1H), . 4. 52 (s, 2H), 4.46 (s, 2H), 4.10-4. 00 (m, 1H) and 1.40-1. 34 (m, 6H).

19F NMR: 300 MHz, CD30D : 5-64. 9 (s, 3F) and-75.5 (s, 6F).

Elemental analysis: Found C: 43.60 H: 3.69 N: 12.94 Calculated C: 43.38 H: 3.87 N: 12.47 Example 2 The product of Example 1 (258 mg; 0. 0005 mole) and cyclohexanone dimethyl ketal (360 mg; 0. 0025 mole) were dissolved in 4.0 ml of a 1: 1 mixture of acetic acid and 1,2-dichloroethane. The mixture was gently refluxed for 0. 5 hours. HPLC [0 to 95% MeCN/H20 * TFA over 6 minutes] indicated that the N-hydroxylbenzamidine was consumed ("* TFA"represents"containing 0. 05% TFA"). The reaction mixture was then concentrated. The residue was triturated with acetone and the solid was filtered and washed with Et20 and suction dried to yield 233 mg of a solid.

Calculated for C30H34N7F303 +1.0 HOAC +0.5 H20 +0.25 Acetone ; Elemental : Theory: C: 57.74 ; H: 5.99 ; N: 14.39 Found: C: 57.68 ; H: 5.87 ; N: 14.15.

Example 3 The product of Example 1 (258 mg; 0. 0005 mole) and cyclopentanone dimethyl ketal (325 mg; 0. 0025 mole) were dissolved in 4.0 ml of a 1: 1 mixture of acetic acid and 1,2-dichloroethane. The mixture was gently refluxed for 0. 5 hours and worked up as described above to yield 103 mg of a solid.

Calculated for C29H32N7F303 +0.8 HOAC +1.0 Acetone ; Elemental: Theory: C: 58.51 ; H: 6.02 ; N: 14.22 Found: C: 58.90 ; H: 5.73 ; N: 13.80.

Example 4 N-hydroxylbenzamidine (258 mg; 0. 0005 mole) and (1,1- dimethoxyethyl) benzene (415 mg; 0. 0025 mole) were dissolved in 4.0 ml of a 1: 1 mixture of acetic acid and 1,2- dichloroethane. The mixture was gently refluxed for 0. 5 , hours and concentrated. The residue was chromatographed over silica, eluting with a MeOH/CH2Cl2 system, to yield 59 mg of a solid.

Calculated for C32H32N, F303 +0. 75 H20 ; Elemental: Theory: C: 60.70 ; H: 5.33 ; N: 15.49 Found: C: 60.73 ; H: 5.02 ; N: 15.02.

Example 5 Carboxylic acid (1. 1 g; 0. 0025 mole), benzylamine HC1 (0. 5 g; 0. 0025 mole), diisopropylethyl amine (DIEA) (1.6 g; 0. 0125 mole) and TBTU (0. 882 g; 0. 11275 mole) were dissolved in 15 ml of DMF and stirred for 18 hours. The reaction mixture was poured into 50 ml of water and the solid was filtered to yield 1.0 g.

Mass Spec: M+H= 516.

HMR (MeOD) : 8 ppm 1. 25 (d, 6H) ; 4. 09 (sep, 1H) ; 4. 48 (s, 1H) ; 4.51 (s, 1H) ; 6.71 (s, 1H) ; 6.84 (s, 1H) ; 6.86 (s, 1H) ; 6.96 (s, 1H) ; 7.13 (d, 1H) ; 7.26 (s, 1H) ; 7.67 (d, 1H).

9FMR (MeOD) : ã ppm-64.83.

Example 6 Example 6a The product of Example 5 (1. 0 g; 0. 0019 mole) and ammonium formate (244 mg; 0. 0038 mole) were dissolved in MeOH (20 ml) and N2 gas was bubbled through the mixture. Pd Black (100 mg) was suspended in MeOH (3 ml) and added to the above mixture. Starting material was still present after 0. 5 hours. An additional portion of ammonium acetate (244 mg) was added. After 0. 5 hours, the remaining starting material was consumed. The reaction mixture was filtered and concentrated to yield 1.2 g of a solid.

Mass Spec: M + H = 518.

1H NMR (MeOD) : 8 ppm 1.25 (d, 6H) ; 4.09 (sep, 1H) ; 4.32 (s, 1H) ; 4.49 (s, 1H) ; 6.71 (s, 1H); 6.77 (d, 1H) ; 6.85 (s, 2H) ; 6.86 (s, 1H) ; 6.96 (s, 1H) ; 7.56 (d, 1H).

19F NMR (MeOD) : 8 ppm-64.80.

Example 6 The product of Example 6a (517 mg; 0. 001 mole) and triethylamine (303 mg; 0. 003 mole) were dissolved in DMF (5. 0 ml). To the mixture, 1, l'-carbonyldiimidazole (648 mg; 0. 004 mole) was added and the mixture was stirred for 18 hours. The mixture was poured into 50 ml of water and the solid was filtered. The solid was triturated with MeOH and filtered to yield 211 mg of a solid.

Calculated for C25H24N7F3O4 +3. 5 H20 Elemental : Theory: C: 49.50 ; H: 5.15 ; N: 16. 16 Found: C: 49.46 ; H: 5.06 ; N: 15.96.

Mass Spec: M+H = 544.

'HMR (DMSO) 5 ppm 1.15 (d, 6H) ; 4.07 (sep, 1H) ; 4.32 (s, 1H) ; 4.34 (s, 1H) ; 6.66 (s; 1H) ; 6.74 (broad s, 2H) ; 6.85 (s, 1H) ; 7.07 (s, 1H) ; 7.11 (d, 1H) ; 6.96 (s, 1H) ; 7.97 (d, 1H).

19FMR (DMSO): 8 ppm-62. 47.

Example 7 The product of Example 6a (517 mg; 0. 001 mole) and 2,2-dimethoxypropane (10 ml) were dissolved in 10. 0 ml of a 1: 1 mixture of acetic acid and 1,2-dichloroethane and refluxed for 3 days. HPLC indicated two new components. The reaction mixture was concentrated and purified by RPLC (0 to 60% MeCN/H20 *THF over 6 minutes). Retention time of the product was 3.79 minutes yielding 60 mg of a glass.

Calculated for C2, H30N, F303 + 2.5 TFA + 1.0 H20 ; Elemental : Theory: C: 44.66 ; H: 4.04 ; N: 11.39 Found: C: 44.48 ; H: 4.71 ; N: 9.45.

Mass Spec: M+H = 558.

HMR (MeOD) : b ppm 1. 36 (d, 6H) ; 1. 66 (s, 6H) ; 4. 05 (sep, 1H) ; 4.45 (s, 1H) ; 4.55 (s, 1H) ; 6.65 (s, 1H) ; 6.86 (broad s, 2H) ; 6.97 (s, 1H) ; 7.02 (s, 1H) ; 7.10 (d, 1H) ; 7.87 (d, 1H).

19FMR (MeOD): 8 ppm-64.85 and-77.42.

Example 8 Example 8a To a 250 mL RBF was added NaH (60%, 0.54 g, 14 mmol) in dry THF (30 mL). The dibocaminobenzyl-4- , hydroxamidine (5. 0 g, 13.7 mmol) was then added to the slurry at 0° C. The reaction was stirred for 0. 5 hrs. To the reaction was added isopropyl chloroformate (1 M solution in Toluene, 13.7 mL). The reaction was stirred for three hours and then quenched with 50 ml of water and extracted with ethyl acetate (3X 50 mL). The organics were dried over magnesium sulfate and then concentrated. The resulting solid was purified on silica using 40% ethyl acetate: 60% hexane to afford Example 8a 4.29 g (69%) as a white solid.

C22H32N3O 7 M. W. 450. 22 1H NMR (CDC13, 300 MHz) 81. 31 (d, 6H), 8 1. 45 (s, 18H), 4. 75 (s, 2H), 5 4. 95 (q, 1H), # 5.15 (bs, 2H), 8 5.35 (s, 1H), # 3. 80 (d, 2H), 6 7. 60 (d, 2H).

13C NMR (CDC13, 75 MHz) 821. 73,27. 94,49. 10,72. 49, 82.70, 126.67, 127.29, 129.69, 141.58, 152.38, 153.27, 155.90.

Example 8b To a 250 ml RBF was added Example 8a (2.29 g, 5.1 mmol) in 4 N HC1 in 50 ml of dioxane. The reaction was stirred for 4 hours. The reaction, monitored by mass spectrometry, was then concentrated in vacuo to afford 1.34 g of the dihydrochloride salt. Because of the hydroscopic nature of the intermediate, the amine was carried onto the next reaction without further manipulations.

Example 8 To a 250 ml RBF was added Example 8b (1. 34 g, 4.15 mmol) and the product of Example lg (2.29 g, 4.73 mmol) in 50 ml of DMF. To the solution was added DIEA (14.41 g, 20 ml) and TBTU (1.82 g, 5.7 mmol). The reaction was stirred over night. The reaction was then poured into ethyl acetate and washed with 10% KHS04, then brine. The organics were dried over magnesium sulfate and concentrated. The resulting solid was purified on silica 20% ramped to 100% ethyl acetate: hexane to afford Example 8 (1.44 g), 58% yield.

C28H32F3N70 ; M-W. 6 0 3. 5 9 Calculated C 55.72 H 5.34 N16.24 F 9.44, found C 54.95 H 5.38 N 15.80 F 9.31 ; 1H NMR (DMSO-d6, 300 MHz) 61. 24 (d, 6H), 1.3 (d, 6H), 4.14 (q, 2H), 4.36 (dd, 4H), 4.89 (q, 1H), 4.89 (q, 1H), 5.83 (bs, 2H), 6.74 (s, 1H), 6.88 (m, 6H), 7.29 (d, 2H), 6. 77 (d, 2H), 8. 66 (t, 1H).

13C NMR (CDC13, 75 MHz) 8 21.12, 21.44, 41.16, 41.83, 47.43, 48.09, 70.97, 11.93, 117.54, 120.80, 121.91, 125.52, , 126.20, 126.45, 127.11, 129.25, 129.48, 129.66, 133.79, 141.00, 148.81, 149.26, 150.57, 152.55, 155.61, 166.01.

Example 9 Example 9a Following the method detailed in, Example- 8a dibocaminobenzyl-4-hydroxamidine (6. 0 g, 16.4 mmol), NaH (60%, 0.69 g, 18.1 mmol), isobutyl chloroformate (2.19 g, 16.4 mmol) afforded 3.8 g in 50% yield.

C23H35N3O7; M. W. 465. 54 1H NMR (CDC13, 300 MHz) 8 0. 91 (d, 6H), # 1. 45 (s, 18H), 8 1. 69 (bs, 1H), 8 2. 05 (q, 1H), 8 4.10 (d, 2H), 8 4. 78 (s, 2H), 8 5. 09 (bs, 2H), 8 7.32 (d, 2H), 8 7.63 (d, 2H).

13C NMR (CDC13, 75 MHz) 818. 89,27. 87,28. 02,49. 17, 74. 46,82. 75,126. 71,127. 46,129. 80,141. 75,152. 49, 153.99, 155.97.

Example 9b Following the method detailed in Example 8b, the product of Example 9a (1.05 g, 2.25 mmol) in 4 N HCl/dioxane afforded 0. 759 g of the dihydrochloride.

Example 9 To a 250 RBF was added the product of Example lg (1.0 g, 2.27 mmol), HOBt (0.922 g, 6.82 mmol) and EDCI (2.03 g, 6.82 mmol) in 75 ml of DMF. To the solution was added Example 9b (0.759 g, 2.25 mmol) and DIEA (1.45 g, 11.35 mmol). The reaction was stirred over night.

To the reaction was added 5% citric acid and ethyl acetate.

The organics were dried over magnesium sulfate and concentrated in vacuo. The resulting solid was purified on silica using 20% to 100% ethyl acetate: hexane to afford Example 9 (0. 30 g, 21% yield) C29H34F3N7O 5 ; M. W. 617.62 ; Calculated C 56.40 H 5.55 N 15.88 F 9.23, found C 56.20 H 5.58 N 14.90 F 8.60 ; 1H NMR (CDC13, 300 MHz) 8 1.24 (d, 6H), 1.3 (d, 6H), 4.14 (q, 21H), 4.36 (dd, 4H), 4. 89 (q, 1H), 4. 89 (q, 1H), 5. 83 (bs, 2H), 6.74 (s, 1H), 6. 88 (m, 6H), 7. 29 (d, 2H), 6.77 (d, 2H), 8.66 (t, 1H).

13C NMR (CDC13, 75 MHz) 5 21.12, 21.44, 41.16, 41.83, 47.43, 48.09, 70.97, 11.93, 117.54, 120.80, 121.91, 125. 52, 126.20, 126.45, 127.11, 129.25, 129.48, 129.66, 133.79, 141.00, 148.81, 149.26, 150.57, 152.55, 155.61, 166.01.

Example 10 Example 10a Prepared by the method of Example 8a. dibocaminobenzyl-4-hydroxamidine (2.55g, 6. 98mmol), NaH (60%, 0.28g, 7.25mmol), ethyl chloroformate (0. 832g, 7. 67mmol) afforded 1.16g in 53.78% yield.

C2lH3lM3° ; M. W. 437. 49 1H NMR (CDC13, 300 MHz) 8 1.41 (t, 3H), 8 1.55 (s, 18H), 4. 38 (q, 2H), 5 4.85 (s, 2H), 8 5.19 (bs, 2H), # 7.32 (d, 2H), 8 7. 63 (d, 2H).

13C NMR (CDCl3, 75 MHz) # 14.59,28.26, 49.43, 64.90, 83.15, 127.03, 127.69, 129.80, 141.75, 152.50, 153.90, 155. 92.

Example lOb Prepared by the method of Example 8b. The product of Example 10a (0.55 g, 1.24 mmol) in 4 N HCl/dioxane afforded 0. 42 g of the dihydrochloride.

Example lOc To a 100 RBF was added the product of Example lg (1.22 g, 2.77 mmol), HOBt (1.125 g, 8.31 mmol), EDCI (2.5 g, 8.31 mmol) in 45 ml of DMF. To the solution was added the product of Example lOb (0. 74 g, 2.77 mmol) and DIEA (1.79 g, 13.85 mmol). The reaction was stirred over night. To the reaction was added 5% citric acid and ethyl acetate. The organics were dried over MgSO4 and , concentrated in vacuo. The resulting solid was purified on silica using 20% to 100% ethyl acetate: hexane to afford Example 10 (0.40 g, 25% yield) C27H30F3N7O 5 + 0.55 H2O M. W. 589.57 ; Calculated C 55.00 H 5.13 N 16. 63, found C 54.14 H 5.23 N 16.36 ; 1H NMR (CDC13, 300 MHz) 81. 18 (d, 6H), 81. 23 (t, 2H), 8 1.31 (t, 2H), 8 4.09 (m, 2H), 8 4.24 (m, 3H), 8 4.43 (s, 1H), 8 5. 45 (bs, 2H), 8 6. 20 (s, 1H), 8 6.71 (m, 2H), 8 6. 82 (d, 1H), # 6. 99 (d, 1H), 8 7. 30 (t, 2H), 8 7.62 (m, 2H).

13C NMR (CDC13, 75 MHz) 814. 23,22. 29, 41.55, 42.83, 43.11, 48.94, 64.67, 11.271, 115.58, 116.79, 118.94, 1121.95, 126.36, 126.92, 127.61, 128.67, 141.15, 147.63, 154.32, 156.66, 167.02.

Example 11 Example lla To a 50 mL RBF was added the , dibocaminobenzyl-4-hydroxamidine (1.0 g, 2.736 mmol) and DIEA (0. 523 g, 4.11 mmol). The reaction was stirred for one hour and n-butyl chloroformate (0. 467 g, 3.42 mmol) was added at room temperature. The reaction was then stirred over night. To the reaction was added ethyl acetate and 5% citric acid. The organics were back washed with brine then dried over MgS04. After the organics were concentrated, the resulting oil was purified on silica using 10%-50% ethylacetate: hexanes. This afforded Example lla (0.43 g) in 34% yield.

C23H35N307 ; M. W. 465.54 Mass Spec: M+H (466.5), M+Na+ (488. 5) Example llb By following the method of Example 8b, the product of Example lla (0. 43 g, 0. 91 mmol) in 4 N HCl/dioxane afforded 0. 31 g of the dihydrochloride.

Example llc To a 100 RBF was added the product of Example lg (0.402 g, 0. 9136 mmol), HOBT (0.370 g, 2.74 mmol) and EDCI (0. 814 g, 2.74 mmol) in 25 ml of DMF. To the solution was added the product of Example llb (0. 31 g, 0. 9136 mmol) and DIEA (0. 59 g, 4.575 mmol). The reaction was stirred over night. To the reaction was then added 5% citric acid and ethyl acetate. The organics were dried over MgS04 and concentrated in vacuo. The resulting solid was purified on silica using 20% to 100% ethyl acetate: hexane to afford Example llc (0. 063 g, 11% yield) C29H34F3N7O5 ; M. W. 617. 62 ; Calculated C 56.4. 00 H 5.55 N 15. 88, found C 56.45 H 5.48 N 15.58 ; 1H NMR (D20, 300 MHz) 6 O. 98 (t, 3H), 81. 23 (d, 6H), 5 1. 45 (q, 2H), 5 1. 70 (qu, 2H), # 4. 28 (t, 2H), 5 4. 43 (s, 2H), 8 4.51 (s, 2H), 8 6.75 (s, 1H), 8 6.88 (d, 2H), 8 6. 98 (s, 1H), 8 7. 35 (d, 2H), 8 7. 45 (m, 2H), 8 7. 89 (d, 2H).

Example 12 Example 12a Synthesized by the method of Example 8a.

Dibocaminobenzyl-4-hydroxamidine (2.3 g, 6.9 mmol), NaH (60%, 0.31 g, 7.7 mmol), p-methoxyphenyl chloroformate (1.21 g, 6.5 mmol) afforded 2.1 g in 62% yield.

C26H33N3O 8; M.W.515.56 ; M. S. M+BT (516.5), M+Na+ (538. 5) ; 1H NMR (CDC13, 300 MHz) # 1.45 (s, 18H), 8 3.83 (s, 3H), . # 4.85 (s, 2H), 8 5.21 (bs, 2H), 8 6.90 (d, 2H), 8 7.19 (d, 2H), 8 7. 39 (d, 2H), # 7. 70 (d, 2H).

Example 12b Synthesized by the method of Example 8b, the product of Example 12a (1.05 g, 1.94 mmol) in 4 N HCl/dioxane afforded 0. 746 g of the dihydrochloride.

Example 12c To a 250 ml RBF was added the product of Example 12b (0. 746 g, 1.94 mmol) and the product of Example lg (1.94 mmol) in 40 ml of DMF. To the solution was added DIEA (1.98 g, 2.75 mL) and TBTU (0. 685 g, 2.1 mmol). The reaction was stirred over night. The reaction was then poured into ethyl acetate and washed with 10% KHS04, then brine. The organics were dried over MgS04 and concentrated. The resulting solid was purified on silica 20% ramped to 100% ethyl acetate: hexane to afford Example 12c (0. 71 g, 56% yield. C32H32F3N7O 6+0.7EA ; M. W. 667.68 ; Calculated C 57.57 H 4.83 N 14.69 F 8.54, found C 57.30 H 5.15 N 13.43 F 7.66 ; 1H NMR (CDC13, 300 MHz) 51. 29 (d, 6H), #3.29 (q, 2H), 8 3. 76 (s, 3H), 8 4. 09 (m, 2H), 6 3. 80 (s, 2H), b 4. 49 (s, 2H), 6. 66 (s, 1H), # 6. 79 (s, 1H), 8 6. 83 (s, 1H), 8 6. 90 (d, 1H), # 6.96 (s, 1H), 6 7.12 (d, 2H), 8 7.26 (d, 2H), 8 7.65 (dd, 2H).

Example 13 Example 13a To a solution of dibocaminobenzyl-4- hydroxamidine (0. 51 g, 1.39 mmol) in 20 ml of dichloromethane was added pyridine (0.25 ml, 3.06 mmol) and pentafluoropropionic anhydride (0.29 ml, 1.46 mmol) at 0°C.

The reaction mixture was allowed to warm to room temperature and stirred for 2 hrs. The reaction mixture was then diluted with water. The layers were separated and the aqeous layer extracted with dichlormethane (2x). The organic extracts were washed with brine (lx). The organic fractions were dried (Na2SO4) and the solvent removed in vacuo to give a white solid, which after chromatography (silica, 10% ethyl acetate/hexanes to 30% ethyl acetae/hexanes) gave Example 13a as a white solid (0. 60 g). m/z + 1 = 494. Example 13b To a round bottom containing the product of Example 13a (0. 60 g, 1.20 mmol) was added 4. 0 N HC1 in dioxane (20 mL) at room temperature. After stirring for 3 hrs at room temperature the precipitate was filtered and dried on high vacuum to give a white powder Example 13b (0. 349 g). m/z + 1 = 294 Example 13c To a solution of the corresponding acid (yellow solid, Mass Spec M + H = 418) (prepared analogously to Example la-lg) (0. 25 g, 0. 64 mmol) in 15 ml of DMF was added TBTU (0. 20 g, 0. 64 mmol) at 0 °C. After 5 min, the product of Example 13b (0.19 g, 0.64 mmol) and DIEA (0.45 mL, 2.56 mmol) were added. The reaction was stirred for 1 hr and then diluted with water and ethyl acetate. The layers were separated and the organic layer was washed with saturated sodium bicarbonate and dried (Na2SO4). The solvent was removed to give a semi-solid, which after chromatography (silica, ethyl acetate) gave Example 13c (0.18 g) as a yellow solid. m/z + 1 = 663 Example 14 Example 14a To a solution of dibocaminobenzyl-4- hydroxamidine (0. 75 g, 2.05 mmol) in 20 ml dichloromethane . was added pyridine (0. 38 mL, 4.51 mmol) and heptafluoropropionic anhydride (0. 53 mL, 2.15 mmol) at 0 °C. The reaction mixture was allowed to warm to room temperature and stirred for 2 hrs. The reaction mixture was then diluted with water. The layers were separated and the aqueous layer extracted with dichloromethane (2x). The organic extracts were washed with brine (lx). The organic fractions were dried (Na2SO4) and the solvent removed in vacuo to give a white solid, which after chromatography- (silica, 10% ethyl acetate/hexanes) gave Example 14a as a white solid (0. 92 g). m/z + 1 = 544.

Example 14b To a solution of the product of Example 14a (0. 92 g, 1.70 mmol) was added 4.0 N HC1 in 20 ml of dioxane at room temperature. After stirring for 3 hrs at room temperature the precipitate was filtered and dried on high vacuum to give a white powder Example 14b (0. 552 g). m/z + 1 = 344 Example 14c To a solution of corresponding acid as used in Example 13 (0. 25 g, 0. 64 mmol) in 15 ml of DMF was added TBTU (0.20 g, 0.64 mmol) at 0°C. After 5 min, the product of Example 14b (0. 22 g, 0. 64 mmol) and DIEA (0. 45 mL, 2.56 mmol) were added. The reaction was stirred for 1 hr and then diluted with water and ethyl acetate. The layers were separated and the organic layer washed with saturated sodium bicarbonate and dried (Na2SO4). The solvent was removed to give a semi-solid, which after chromatography (silica, ethyl acetate) gave Example 14c (0. 18 g) as a yellow solid. m/z + 1 = 713 Example 15 Prepared analogously to Example 1.

Example 16 The product of Example 15 (87.3 mg, 0. 163 mmol) and Compound 1 (prepared as in U. S. Patent No. 5,466, 811) (53.0 mg, 0. 180 mmol) were stirred overnight at room temperature in 2 ml of DMF. The bright yellow crude reaction mixture was purified by reverse phase HPLC and lyophilized to afford a colorless solid Example 16 (11.0 mg, 0. 012 mmol) as a TFA salt. HPLC/MS calc. Mass Spec M+H: 691. 2762.

Found: 691.29.

Example 17 Compound 2 (prepared by catalytic hydrogenation of Example 15) (50. 0 mg, 0. 96 mmol) and 1 (31.0 mg, 0. 106 mmol) were stirred at room temperature for 1 hour in DMF (1 mL).

The crude reaction mixture was purified by reverse phase HPLC and lyophilized to afford a light yellow solid Example 17 (33. 0 mg, 0. 031 mmol) as a TFA salt. 1H-NMR (300 MHz, , CD30D) : 8 1. 25 (d, J=6. 6 Hz, 6H), 1.40 (d, J=6.4 Hz, 6H), 2.30 (s, 3H), 4.15 (m, 2H), 4.51 (s, 2H), 4.69 (s, 2H), 5.28 (s, 2H), 6.73 (s, 1H), 6.87 (s, 1H), 7.06 (s, 1H), 7.22 (s, 1H), 7.47 (d, J=7.9 Hz, 2H), 7.80 (d, J=8. 26 Hz, 2H) ; HRMS calculated for C33H38N808 Mass Spec M+H: 675.2813.

Found: 675.2885.

Example 18 Example 18a Dibocaminobenzyl-4-hydroxamidine (50. 0 mg, 0.14 mmol), compound 3 (prepared as in U. S. Patent No.

5,466, 811) (30.0 mg, 0.16 mmol) and KHC03 (16.0 mg, 0.16 mmol) were dissolved in 0. 5 ml of DMF and 5 ml of acetonitrile at 60°C for 5 hours. The crude reaction mixture was concentrated under a stream of N2. To the resulting orange oil was added 4 N HC1 (1 mL) in 1 ml of dioxane and stirred at room temperature for 5 hours. The crude reaction mixture was concentrated under a stream of eN2 to afford Example 18a as an orange solid.

Example 18b To the product of Example 18a was added compound (4) (yellow solid, Mass spec M + H = 418) (20. 0 mg, 0. 052 mmol), NMM (21 mg, 0. 21 mmol), HOBT (8.4 mg, 0.062 mmol), and DMF (0.75 mL). EDC (12.0 mg, 0.062 mmol) was then added and the reaction mixture was stirred at room temperature for 2 hours. The crude reaction mixture was diluted with methanol, purified by reverse phase HPLC, and lyophilized to afford a yellow solid, Example 18b (8. 0 mg, 0. 0092 mmol) as a TFA salt. HPLC/MS calc. Mass spec M+H: 647.2863. Found: 647.43.

Example 19 Example 19a To compound 5 (prepared analogously to Example la-lg) (1.5 g, 3.36 mmol) was added HOBT (0. 45 g, 3.36 mmol) and EDC (0.71 g, 3.7 mmol) in 12 ml of DMF. The mixture was stirred at RT for 30 min. The amine HC1 salt (0.62 g, 3.7 mmol) in DMF (8 ml) and NMM (0.67 g, 6.7 mmol) was then added to the mixture which was kept stirring overnight. Water was then added to the mixture and filtered to yield 2 g solid. MS confirmed the product. MS (ES, m/z) 562. 23 (M+H).

Example 19b To the product of Example 19a (1.6 g) in THF (20 ml) was added Pd/C (10% 0.5 g). The mixture was set on hydrogenation shake at 25 psi for 3 hr, then filtered and concentrated to yield 1.5 g solid without purification. MS (ES, m/z) 532.26 (M+H) Example 19c To the product of Example 19b (1.7 g, . 3.22 mmol) in CH2C12 (15 ml) was added NMM (0.37 g, 3.5 mmol) and isobutryl chloride (0. 37 g, 3.5 mmol). The mixture was kept stirring at room temperature for lhr. The mixture was then washed with 40 ml of 10% citric acid, 40 ml of saturated NaHC03 and 40 ml of water. Combined CH2Cl2, was dried with MgS04, filtered and concentrated to yield 2 g crude products without purification. MS (ES, milz) 602.30 (M+H) Example 19d To the product of Example 19c (0.85 g, 1.4 mmol) in 4 ml of ethanol was added NH20H (225 mg, 3.15 mmol) and K2CO3 (450 mg, 3.15 mmol) at room temperature.

The mixture was heated at 80°C overnight, filtered and concentrated to yield 0. 7 g solid without purification. MS (ES, m/z) 635.32 (M+H).

Example 19 To the product of Example 19d (0.24 g, 0. 38 mmol) in 2 ml pyridine was added trifloroacetic anhydrate (99 mg, 0. 47 mmol). The mixture was heated to 65° C for overnight, then concentrated and added with CH2C12/TFA (1 ml/2 ml). The mixture was stirred at room temperature for lhr, then purified on RP-HPLC to yield 85 mg white solid. mp 221-224°C.

HRMS calculated for C29H3lF3NS04 Mass Spec M+H: 613.2493.

Found: 613.2506.

Anal. Calculated for C29H31F3N8O4 +1CF3COOH, 2H2O : C, 48.82 ; H, 4.75 ; N, 14.69.

Found: C, 48.87 ; H, 4.47 ; N, 14.32.

1H NMR (d4-DMSO) 5 1.08 (6H, d, J= 6.7Hz, CH3), 1.25 , (6H, d, J= 6.4Hz, CH3), 2.59 (1H, m, CH),? 4.09 (1H, m, CH), 4.39 (2H, d, J= 5.9Hz, CH2), 4.45 (2H, s, CH2), 6.42 (1H, s, CH), 6.68 (1H, s, CH), 6.94 (1H, s, CH), 7.23 (1H, s, CH), 7.44 (2H, d, J= 8.3Hz, 2CH), 8.01 (2H, d, J= 8. 3Hz, 2CH), 8. 65 (1H, s, NH), 9. 80 (1H, s, NH).

Example 20 Example 20a To a mixture of dibocaminobenxyl-4- hydroxamidine (8.2 mmol, 3. 0 g) and pyridine (31.5 mmol, 2.55 ml) was added trifluoroacetic acid anhydride (18.1 mmol, 2.55 ml) while cooling in a water bath. The reaction was stirred at room temperature for 2 hours. The reaction was then concentrated in vacuo and the residue was mixed with ethyl acetate (100 ml), washed with 1 N sodium hydrogen sulfate (3x 25 ml), saturated sodium bicarbonate (2x 25 ml) and brine (25 ml), dried over magnesium sulfate, filtered, and concentrated in vacuo to give 3.49 g of Example 20a as an off-white solid.

1H NMR (CDC13) 8 1.51 (s, 18H), 4.89 (s, 2H), 7.79 (d, J = 8.7 Hz, 2H), 8.14 (d, J = 8.4 Hz, 2H).

19F NMR (CDC13) 8-65. 06 (s, 3F).

Example 20b A mixture of the product of Example 20a (7.5 mmol, 3.34 g) in 20 ml of dioxane was stirred with 4 N hydrogen chloride in 40 ml of dioxane at ambient temperature for 1 hour. The reaction was concentrated in vacuo to give 2.46 g of Example 20b as an off-white solid.

1H NMR (d6-DMSO) S 4.17 (s, 2H), 7.78 (d, J = 8. 7 Hz, 2H), 8.14 (dd, J = 1.8, 6.6 Hz, 2H), 8.66 (br s, 2H).

19F NMR (d6-DMSO) 5-65. 06 (s, 3F).

MS (ES) M+H m/z 244.

Example 20c To the product of Example lg (0. 97 mmol, 0.43 g), N-methylmorpholine (1.0 mmol, 0. 11 mL), N- cyclohexylcarbodiimide-N'-methylpolystyrene (PS-DCC) (4.25 mmol, 2.5 g), and HOBT (1.06 mmol, 0.144 g) in 15 ml of DCM, cooled in an ice bath, was added a warm solution of Example 20b (0.88 mmol, 0.247 g, ) in DMF (5 ml) and N- methylmorpholine (4. 0 mmol, 0. 44 mL). The reaction was slowly allowed to warm to room temperature and stirred for 16 hr. The reaction was filtered and the solids washed with DCM and DMF. The combined filtrate and washes were concentrated in vacuo and purification by reverse phase HPLC (30-70% acetonitrile/water) followed by lyophilization yielding 169 mg (27% yield) of Example 20 as an off-white solid. mp: 196-198 °C.

1H NMR (d6-DMSO) 8 1.29 (s, J = 6.6 Hz, 6H), 4.07-4. 20 (m, 1H), 4.39 (s, 2H), 4.41 (s, 2H), 6.77, (s, 1H), 6.82 (s, 2H), 7.45 (d, J = 8.4 Hz, 2H), 8.03 (d, J = 8.4 Hz, 2H), 8.74 (t, J = 5.8 Hz, 1H).

19F NMR (d6-DMSO) 8-61. 98 (s, 3F),-65. 08 (s, 3F).

HRMS calculated for C26H24F6N7O33 (M+H): 596.1839.

Found: 596.1809.

Anal. calculated for C26H23 F6N, 03+0. 9 TFA, 0. 15 H20 : C, 47.64 ; H, 3.48 ; N, 13.99.

Found: C, 47.68 ; H, 3.54 ; N, 13.84.

Example 21 Example 21a A solution of di (tert-butyl) 4- [amino (imino) methyl] benzylimidodicarbonate (2. 34 g, 5,72 mmol), diisopropyl ethyl amine (2.22 g, 17.2 mmol), and 0- benzylhydroxylamine hydrochloride (1.83 g, 11.4 mmol) in 200 ml of ethanol was refluxed in a 500 ml round bottom flask for 12 hours. The reaction mixture was then allowed to cool and concentrated to give 9.71 g of crude product-.

The crude product was chromatographed on silica to give 1.54 g of a white crystalline product, 59% yield.

LC (0-60%, acetonitrile/water, in 8 min): 5.91 min.

MS M+H 456 NMR (400MHz, CDC13) : 1H 1.433ppm (18H, s), 4.763ppm (2H, s), 5.135ppm (2H, s), 7.349ppm (7H, m), 7.602ppm (2H, m).

4- (aminomethyl)-N'- (benzyloxy) benzenecarboximidamide hydrochloride Example 21b The product from Example 21a (0. 40 g, 0. 878 mmol) was dissolved in 4 M hydrochloride acid in dioxane (50 ml, 200 mmol) and stirred 2 hours. The reaction mixture was concentrated, redissolved in ethyl acetate and concentrated to give 0. 33 g of a white powder, 4- (aminomethyl)-N'- (benzyloxy) benzenecarboximidamide hydrochloride.

LC (0-60%, acetonitrile/water, in 8 min): 2.13 min.

MS M+H 256 NMR (400 MHz, CDC13) : 1H 4.109 ppm (2 H, s), 5.008 ppm . (2 H, s), 7.348 ppm (3 H, m), 7.448ppm (6 H, m).

Example 21 A solution of the product from Example Ig (0. 35 g, 0. 58 mmol), the product from Example 21b (O. 33 g, 1.0 mmol), benzotriazol-1-yl tetramethyluronium tetrafluoroborate (1.1 g, 3.43 mmol), diisopropyl ethyl amine (0.84 g, 6.5 mmol), and in 50 ml of N, N-dimethyl formamide and stirred 3 hours. To the reaction mixture was added 20 ml of 10% Potassium hydrogen sulfate. A precipitate formed and was filtered off. The precipitate was concentrated and then dissolved in acetonitrile and water. The product was purified by HPLC to 300 mg of 1 N- (4- ( (Z)-amino [ (benzyloxy) imino] methyl} benzyl)-2- [6- [3- amino-5- (trifluoromethyl) phenyl]-3- (isopropylamino)-2- oxopyrazin-l (2H) -yl] acetamide trifluoroacetate a whitish yellow solid, 71% yield.

LC (0-60%, acetonitrile/water, in 8 min): 4.39 min.

MS M+H 608 NMR (400 MHz, CD30D) : 1H 1.345 ppm (6 H, d), 4.046 ppm (1 H, m), 4.421 ppm (2 H, broad d), 4.511 ppm (2 H, s), 5.085 ppm (2 H, s), 6.662 ppm (1 H, s), 6.869 ppm (2 H, d), 7.001 ppm (1 H, s), 7.384 ppm (5 H, m), 7.517 ppm (4 H, m).

19F-64. 848 ppm (3 F, s), -77.509 ppm (3 F, s).

Elemental Analysis Found C: 50.61 H: 4.25 N: 11.89 Calc. C: 51.99 H: 4.29 N: 12.41 Example 22 Example 22a A solution of di (tert-butyl) 4- [amino (imino) methyl] benzylimidodicarbonate (2.35 g, 5,74 mmol), diisopropyl ethyl amine (2.23 g, 17.2 mmol), and 0- phenylhydroxylamine hydrochloride (1.67 g, 11.4 mmol) in 100 ml of ethanol was refluxed in a 500 ml round bottom flask for 36 hours. The reaction mixture was allowed to cool and concentrated to give 5.8 g of crude product. The crude product was chromatographed on silica to give 0. 65 g of a white crystalline product, 25% yield.

LC (0-60, acetonitrile/water, in 8 min): 5.31 min.

MS M+H 442 NMR (400 MHz, CDC13) : 1H 1. 447. ppm (18H, s), 4.796 ppm (2 H, s), 6.908 ppm (1 H, m), 7.289 ppm (6 H, m), 7.699 ppm (2 H, m).

4-(aminomethyl)-N'-phenoxybenzenecarboximidamide hydrochloride Example 22b The product from Example 22a (0. 650 g, 1. 47 mmol) was dissolved in 4 M hydrochloride acid in dioxane (25 ml, 100 mmol) and stirred for 8 hours. The reaction mixture was concentrated, redissolved in ethyl acetate and concentrated to give 0. 463 g of a white powder, 4- (aminomethyl)-N'- (phenyloxy) benzenecarboximidamide hydrochloride.

LC (0-60%, acetonitrile/water, in 8 min): 2.622 min.

MS M+H 242 Example 22c A solution of the product from Example lg (0. 98 g, 2.21 mmol), the product from Example 22b (0. 463 g, 1.47 mmol), benzotriazol-1-yl tetramethyluronium tetrafluoroborate (1.76 g, 5.48 mmol), diisopropyl ethyl amine (1.41 g, 10.9 mmol), and in 50 ml of N, N-dimethyl formamide and stirred 6 hours. A precipitate formed and was filtered off. The precipitate dissolved in acetonitrile and water. The product was purified by HPLC to 400 mg of 1 N- (4-{ (Z) - amino [ (phenyloxy) iminolmethyl) benzyl)-2- [6- [3-amino-s- (trifluoromethyl) phenyl]-3- (isopropylamino)-2-oxopyrazin- 1 (2H)-yl] acetamide trifluoroacetate a whitish yellow solid, 45% yield.

LC (0-60%, acetonitrile/water, in 8 min): 5.36 min.

MS M+H 594 NMR (400 MHz, CD30D)'H 1.323 ppm (6 H, d), 4.020 ppm (1 H, m), 4.332 ppm (2 H, broad d), 4.444 ppm (2 H, s), 6.622 ppm (1 H, s), 6.877 ppm (2 H, d), 6.957 ppm (1 H, s), 7.022 ppm (1 H, s), 7.236 ppm (6 H, m), 7.618 ppm (1 H, m) 7.700 ppm (2 H, d).

19F-63. 841 ppm (3 F, s),-76. 861 ppm (3 F, s).

Elemental Analysis Found C: 48.98 H: 3.91 N: 11.79 Calculated C: 49.70 H: 3.93 N: 11.93 Example 23 Example 23a 0.234 g (0.56 mmol) of compound 1 was hydrolyzed with 10 mL TFA for 2 hours stirring at room temperature. TFA was evaporated to dryness to yield 0.19 g (0. 52 mmol) of Example 23a as a white solid.

Mass Spec: M + H = 363. 2.

Example 23b Example 23a was dissolved in 15 mL DMF and coupled with 0. 332 g (1 mmol) 4-aminobenzonitrile in the presence of 0. 256 g (0. 8 mmol) TBTU and 0. 525 mL DIPEA for 16 hours. Adding 200 mL H20, the product precipitated and it was filtered and dried to yield 0.205 g (0.43 mmol; 76%) of Example 23b as a yellow solid.

Mass Spec: M + H = 477.3.

Example 23c The product of Example 23b was dissolved in 20 mL MeOH and reduced with 0. 126 g HCOONH4 in the presence of 0. 05 g Pd black stirring under N2 for 15 minutes. The catalyst was filtered off and the solvent was evaporated to afford Example 23c.

Example 23d The clear oily residue was dissolved in 10 mL EtOH and refluxed with H2N-OH xHCl in the presence of 1 mL DIPEA for 4 hours. The solvent was evaporated and the residue was purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the title product at 38% AcN, 0. 092 g (23%) as a white hygroscopic solid.

Mass Spec: M + H = 480. 4.

1H NMR: 400 MHz, CD ; OD : 7.68-7. 62 (d, 2H), 7.48-7. 42 (d, 2H), 6.84-6. 80 (s, 2H), 6.57-6. 50 (m, 2H), 4.62-4. 56 (s, 2H), 4.50-4. 42 (m, 2H), 4.08-3. 98 (m, 1H), 3.75-3. 70 (m, 3H) and 1.42-1. 34 (m, 6H).

Elemental analysis: Found C: 45.32 H: 4.63 N: 12.71 Calculated C: 45.58 H: 4.47 N: 13.10 Example 24 Example 24a 1 g (2.4 mmol) of 4- (N, N-diBoc-amino)- benzylamidine acetate was dissolved in 10 mL DMF and it was reacted with 0. 67 mL (5 mmol) 1-chloroethyl ethyl carbonate in the presence of 7.5 mL (7.5 mmol) 1 N NaOH for 16 hours.

Then DMF was evaporated and the residue was dissolved in 100 mL EtOAc. It was washed with brine, dried over MgSO4, filtered and the solvent was evaporated to afford Example 24a. Yield: 0. 91 g (2.1 mmol; 90%) oil.

Mass Spec: M + H = 422.2.

Example 24b The product of Example 24a was dissolved in 40 mL CH2C12 and it was deprotected with 10 mL TFA stirring for 30 minutes to afford Example 24b.

Mass spec: M + H = 222.3.

Example 24 The product of Example 24b was coupled with 0. 484 g (1 mmol) of the product of Example lg in the presence of 0. 875 mL (5 mmol) DIPEA and 0. 385 g (1.2 mmol) TBTU with stirring for 3 hours in 30 mL DMF. The solvent was evaporated and the residue was purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the title product at 34% AcN, 0.46 g (57%) as a light brown solid.

Mass Spec: M + H = 574.3.

1H NMR: 400 MHz, CD30D : 7.78-7. 73 (d, 2H), 7.51-7. 44 (d, 2H), 7.02 (s, 1H), 6.90-6. 84 (d, 2H), 6.68 (s, 1H), 4.54-4. 38 (m, 6H), 4.10-4. 00 (m, 1H) and 1.42-1. 32 (m, 9H).

19F NMR: 400 MHz, CD ; OD : -64.9 (s, 3F) and-77.5 (s, 6F) Elemental analysis: Found C: 45.58 H: 4.10 N: 12.41 Calculated C: 45.43 H: 4.18 N: 11.96 Example 25 Example 25a 2.5 g (6.1 mmol) 4- (N, N-diBoc-amino)- benzylamidine acetate was dissolved in 30 mL MeOH and it was refluxed with 1.35 g (20 mmol) methylamine xHCl in the presence of 5.25 mL (30 mmol) DIPEA for 12 hours. MeOH was evaporated and the residue was dissolved in 100 mL EtOAc and it was washed with brine, dried over MgSO4 and the solvent was evaporated to yield 1.5 g (4. 2 mmol ; 67%) of Example 25a as an oil.

Mass Spec: M + H = 364. 3.

Example 25b The product of Example 25a was dissolved in 40 mL CH2C12 and it was deprotected with 10 mL TFA stirring for 30 minutes to afford Example 25b.

Example 25 The product of Example 25b was coupled with 0. 484 g (1 mmol) of the product of Example lg in the presence of 1.75 mL (20 mmol) DIPEA and 0. 353 g (1.1 mmol) TBTU with stirring for 3 hours in 25 mL DMF. The solvent was evaporated and the residue was purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the title product at 32% AcN, 0.27 g (36%) as a white solid.

Mass Spec: M + H = 516.2.

1H NMR: 400 MHz, CD30D : 7.69-7. 62 (d, 2H), 7.47-7. 42 (d, 2H), 7.00 (s, 1H), 6.88-6. 82 (d, 2H), 6.68 (s, 1H), 4.52 (s, 2H), 4.46 (m, 2H), 4.10-4. 00 (m, 1H), 3.32-3. 28 (m, 3H) and 1. 38-1. 28 (m, 6H).

19F NMR: 400 MHz, CD30D : -64.9 (s, 3F) and-77.5 (s, 6F) Elemental analysis : Found C: 45.62 H: 4.11 N: 13.16 Calculated C: 45.74 H: 4.24 N: 12.87 Example 26 Step A: (26a) To a slurry of 500 mmol of the ammonium salt of 2- nitroacetamide in 400 grams of water is added 600 mmol of ethyl 2, 4-dioxo-4- (3- (t-butoxycarbonylamino)-5- trifluoromethylphenyl) butanoate (prepared by standard methods from diethyl oxalate and 1-acetyl-3- (t- butoxycarbonylamino)-5-trifluoromethylbenzene). A solution of piperidinium acetate (prepared by adding 72 mL of piperidine to 42 mL of acetic acid in 200 mL of water) is then added. The resulting reaction mixture is stirred at 40 °C for about 24 hours. The reaction product 26a is then separated, dried and used in the next step.

Step B: (26b) A solution of the pyridone 26a from Step A (400 mmol) in 500 mL of methylene chloride is treated with 500 mmol of solid trimethyloxonium tetrafluoroborate and the mixture stirred at 40 °C until the reaction is complete as monitored by liquid chromatography. The reaction mixture is concentrated about 70% and chromatographed on silica gel to afford the methoxy pyridine 26b.

Step C: To a solution of the pyridine 26b from Step B (350 mmol) in 1000 mL of methylene chloride at-70 °C is added with 700 mmol of DIBAL (1 molar in hexane) using a dropping funnel. The resulting solution is stirred for 1 hour and then warmed to room temperature over an additional hour.

The reaction mixture is quenched by the careful addition of saturated sodium potassium tartrate. After stirring for 30 additional minutes, the solid is filtered and washed with 500 mL methylene chloride. The filtrate is washed twice with 500 mL of saturated sodium potassium tartrate and then 500 mL of brine. The solution is concentrated and then chromatographed to afford the desired alcohol 26c.

Step D: To a solution of phosgene (350 mmol) in 1000 mL of methylene chloride at-70 °C is added 700 mmol of DMSO in 100 mL methylene chloride using a dropping funnel. Then, the resulting solution is treated with the pyridone alcohol 26c from Step C (300 mmol) in 500 mL of methylene chloride, stirred for an additional 15-30 minutes, treated with 225 mL of triethylamine, and then warmed to room temperature over an additional 1.5 hours. The reaction mixture is quenched by the addition of 1000 mL water and the two phases separated. The aqueous is extracted twice with 1000 mL of methylene chloride and the combined organic extracts is washed with 500 mL of brine. The methylene chloride solution is dried over MgS04, concentrated, and then chromatographed to afford the desired aldehyde 26d.

Step E: To a solution of diethyl 2- (3-methyl-2-oxo- butyl) phosphonate (250 mmol; obtainable through a standard Arbuzov reaction between l-bromo-3-methyl-2-butanone and triethyl phosphite) in 1000 mL of THF at 0 °C is added 250 mmol of NaH. Then, the resulting solution is stirred until hydrogen evolution ceased and then treated with the pyridine aldehyde 26d from Step D (250 mmol) in 800 mL of THF. The solution is heated at 50 °C for 180 minutes, cooled, and evaporated. The residue is redissolved in 2000 mL of ethyl acetate and quenched to a pH of 7 with saturated ammonium chloride. The organic phase is washed with brine, dried over MgS04, concentrated, and then chromatographed to afford the desired nitro ketone 26e.

Step F : To a solution of nitro ketone 26e from Step E (225 mmol) in 1000 mL of ethyl acetate is added 20 grams of 10% Pd/C. Hydrogen gas is added until uptake of hydrogen stopped. The reaction mixture is filtered through Celite and the filtrate evaporated. The residue is then chromatographed to afford the desired bicyclic methoxy pyridine 26f.

Step G: To a solution of methoxy pyridine 26f from Step F (200 mmol) in 1000 mL of dichloroethane at ambient temperature is added 400 mmol of boron tribromide in 400 mL methylene chloride. After stirring for about two hours, the reaction mixture is quenched to a pH of 8 with saturated sodium bicarbonate. The mixture was diluted with 2000 mL of ethyl acetate and 200 mL of THF. The aqueous phase is discarded and the organic solution washed with 200 mL water followed by 200 mL of brine. The reaction mixture evaporated to afford the desired bicyclic pyridone 26g.

Step H: The bicyclic pyridone 26g from Step G (150 mmol) is alkylated with tert-butyl bromoacetate using the procedure of Example ld to afford the desired bicyclic pyridone acetate 26h.

Step I: The bicyclic pyridone acetate 26h from Step H (100 mmol) is deprotected with trifluoroacetic acid as described in Example lg to afford the desired bicyclic pyridone acetic acid 26i.

A solution of compound bicyclic pyridone acetic acid 26i (50 mmol) in DMF (250 mL) is treated with N- hydroxybenzotriazole (60 mmol) and EDC hydrochloride (60 mmol). The mixture is stirred at room temperature for 30 min and treated with 4- (N-Cbz-amidinobenzylamine (50 mmol).

The resulting mixture is allowed to stir overnight.

Typical aqueous workup is followed by chromatographic purification to afford pure Example 26 product.

Example 27x Compound of Example 26 (10 mmol) and 10% Pd on activated carbon (0.100 g) are mixed with 100 mL methanol.

The mixture is stirred for 2 hours under an atmosphere of hydrogen that is introduced through a rubber balloon.

After filtering off the catalyst and removing the methanol, the remaining residue is obtained as Example 27.

Example 28x Step A: To a slurry of 500 mmol of the ammonium salt of 2- nitroacetamide in 400 grams of water is added 600 mmol of ethyl 3-oxo-3- (3- (t-butoxycarbonylamino)-5- trifluoromethylphenyl) propanoate (prepared by standard methods from diethyl carbonate and 1-acetyl-3- (t- butoxycarbonylamino) -5-trifluoromethylbenzene). A solution of piperidinium acetate (prepared by adding 36 mL of piperidine to 21 mL of acetic acid in 100 mL of water) is then added. The resulting reaction mixture is stirred at 40 °C for about 24 hours. The reaction product 28a is then separated, dried and used in the next step.

Step B: A solution of the pyridone 28a from Step A (400 mmol) in 2000 mL of acetonitrile is treated with 1.6 moles of phosphorusoxychloride and 1.5 moles N-benzyl-N, N, N- triethylammonium chloride. The mixture is stirred at 40 °C and then heated at reflux until the reaction is complete as monitored by liquid chromatography. The reaction mixture is concentrated to remove solvent, and the residue is slurried with water (1000 mL). The product is separated to afford the chloro pyridone 28b.

Step C: The chloro pyridone 28b from Step B (350 mmol) is alkylated with tert-butyl bromoacetate using the procedure of Example ld to afford the desired bicyclic pyridone acetate 28c.

Step D: To a solution of bicyclic pyridone acetate 28c from Step C (300 mmol) in 1500 mL of ethanol is added 2,2- dimethoxy-3-methylbutanamine (300 mmol) and 600 mmol of triethylamine. The solution is stirred at 70 °C for 16 hours or until the reaction is complete. The reaction mixture is cooled and evaporated to remove all of the ethanol. The residue is partitioned between ethyl acetate and water, and the organic phase is washed with brine, dried over MgSO4, concentrated, and then chromatographed to afford the desired nitro ketal 28d.

Step E: (28e) The nitro ketal 28d from Step D (250 mmol) is hydrolyzed and the tert-butyl ester removed by stirring with trifluoroacetic acid (50 mL), water (200 mL) and THF (500 mL) until completion as monitored by chromatography.

The reaction mixture is concentrated at ambient temperature to give the trifluroacetic acid salt of unpurified nitro ketone 28e and used as is in the next step.

Step F: To the nitro ketone 28e from Step E (225 mmol) in 1000 mL of ethyl acetate is added 20 grams of 10% Pd/C.

Hydrogen gas is added until uptake of hydrogen stopped.

The reaction mixture is filtered through Celite and the filtrate evaporated. The residue is then chromatographed-to afford the desired bicyclic pyridone acetic acid 28f.

A solution of compound bicyclic pyridone acetic acid 28f (50 mmol) in DMF (250 mL) is treated with N- hydroxybenzotriazole (60 mmol) and EDC hydrochloride (60 mmol). The mixture is stirred at room temperature for 30 min and treated with 4- (N-Cbz-amidinobenzylamine (50 mmol).

The resulting mixture is allowed to stir overnight.

Typical aqueous workup is followed by chromatographic purification to afford pure Example 28 product.

Example 29x Compound of Example 28 (10 mmol) and 10% Pd on activated carbon (0.100 g) are mixed with 100 mL methanol.

The mixture is stirred for 2 hours under an atmosphere of hydrogen that is introduced through a rubber balloon.

After filtering off the catalyst and removing the methanol, the remaining residue is obtained as Example 29.

Using these methods and ordinary skill in the art of synthetic numerous novel compounds of the present invention have been or can be prepared.

Metabolic Stability Assay Hepatic S9 Fraction Incubation In order to determine the metabolic stability of each of the tested compounds, the following assay conditions were used: 100 mM phosphate buffer, 1. 0 mM NADPH, 3.3 mM magnesium chloride, 2.0 mg/mL protein from Hepatic S9 Fraction and 1.0 uM of substrate.

The assay was performed on a 96-well conical shaped plate with a volume of 200 uL, after addition of methanol.

For each species, a set of samples was prepared as shown below (volumes are in uL). Solution Added Inactivated S9 Active S9 Fraction Fraction Protein Protein 2X Cofactor Buffer 40 40 lOX Inactivated S9 10 0 Fraction 10X Active S9 Fraction 0 10 Protein 2X Substrate 50 50 MeOH (with Internal 100 100 Standard) The plate was sealed and incubated in a Thermal Mixer at 37°C for 30 minutes at 400 rpm. 100 uL of methanol was added to each well and the plate was mixed for several "minutes and then covered with an aluminum seal. Finally, the plate was centrifuged at 1000 rpm for 10 minutes.

The assay was analyzed using liquid chromatography and positive ion elctrospray mass spectrometry. The chromatography column used was Agilent Zorbax SB-C18 (3. 0 x 150mm, 5um) with a flow rate of 0. 5 mL/min.

Calculations were performed to determine the percent remaining, which is calculated by dividing the Peak Area Ratio of the analyte measured in the active protein versus the Peak Area Ratio of the analyte measured in the inactivated protein sample. The Peak Area Ratio is defined as the peak area of the analyte divided by the peak area of the internal standard. Analyte is defined as the substrate of a specific measurable metabolite.

The results of the assay are summarized in Table 1 below.

TABLE 1 Comp. No. BA S9 Rat S9 Hum. % Conv. BA Drug 1 11% 2% 2 3 4 17% 0% 0% 5 5% 13% 0. 50% 6 7% 7 54% 5% 22% 0. 60% 8 20% 3% 1% 0. 30% 0. 40% 9 1% 0% 0% 9% 10 11 44% 40% 12 3%. 11% O. 50% 13 68% 2% 4% 6% 3% 14 1% 1% 1% 2. 40% 0% 15 4% 25% 39% 16 0% 0% 17 18 36% 5% Comp. No. BA S9 Rat S9 Hum. % Conv. BA Drug 19 1. 60% 20 2% LR LR 1% 21 22 23 NR NR 24 1% 1% 25 13% 30 29 14% 17% "BA"represents bioavailability of prodrug after oral adminstration,"S9 rat"and"S9 human"represent respectively rat and human liver S9 fractions.

Bioavailability Test System : Healthy male rats [Crl: CD (SD) BR] were obtained from Charles River Breeding Laboratory (Canada). The rats did not receive any drug treatments prior to the initiation of the study. The animals weighed 250 to 320 g and were individually identified by labeling on each metabolism cage. The rats were housed in individual metabolism cages during dosing and sample collections. The animals were acclimated to a diet of Purina Rodent Chow #5002 (Ralston Purina, St. Louis, MO) for at least 5 days and were fasted for 15-20 hours prior to the administration of the compound. Food was available from 4 hours after dose administration and ad libitum throughout the remainder of the study.

Doses: Each animal received the prodrug orally at an equivalent dose of 10 mg of free base of active moiety per kg of body weight or active moiety orally at an equivalent dose of 10 mg equivalent free base per kg body weight. For intravenous (IV) study, the animals received 1 mg free base/kg body weight. Sufficient amount of the test article was dissolved in appropriate vehicle (See table below) such that the final concentration of dose solution was 2. 0 mg. free base/mL and 0. 5 mg free base/mL for oral and IV doses, respectively. The dose volume was 5 mL/kg and 2 mL/kg for oral and IV doses, respectively Sample Collection and Analysis: Blood samples were collected from the jugular vein at specified time intervals. Concentrations of test article and/or prodrug were analyzed using a LC-MS/MS procedure.

Phamacokinetic Analysis : Model independent pharmacokinetic parameters (Cmax, Tmax, AUC, T1/2, CL, Vss) were obtained using Watson computer program. The bioavailability (BA) was calculated as follows: [AUC] oral/0'al Dose # BA = # x 100 [AUC] IV dose The percentages of conversion of prodrug to active moiety was calculated using the following equation: [AUC] Active moiety After IV Dose of Prodrug % Conversion = x 100 [AUC] Active Moiety After IV Dose of Active Moiety "AUC"represents area under the curve.

The results are shown in Table 1 in Example 30.

Table for vehicles IG Formulations: 1.10% EtOH/10% Tween 80/80% Capmul MCM 2.10% EtOH/10% PEG 200/80% H20 3. 10% EtOH/10% PEG 400/80% H20 4.10% Tween 80/90% Capmul MCM 5. 100% PEG 400 6.10% EtOH/5% Tween 80/85% Capmul MCM IV Formulations: 1.10% PEG 400/10% EtOH/80% Saline 2. 30% PEG 400/70% Saline 3.35% PEG 400/65% Saline 4.40% PEG 400/60% Saline 5.10% PEG 400/10% EtOH/80% Saline 6.30% PEG 400/5% Tween 80/65% Saline 7.100% Saline Example 27 Example 27a: A mixture of di- (tert-butyl) 4-cyano-2,3- difluorobenzylimidodicarbonate (0.5 g, 1.4 mmol), hydroxylamine hydrochloride (0.28 g, 4.1 mmol), and triethylamine (0. 57 ml, 4.1 mmol) in ethanol was heated to reflux for 1 hour. The reaction was concentrated in vacuo and the residue mixed with ethyl acetate, washed with 1N potassium hydrogen sulfate, saturated sodium bicarbonate, brine, dried over magnesium sulfate, filtered, and evaporated in vacuo to give 0. 5 g of Ex-27a (89% yield).

LCMS (M+H) m/z 402. 1HNMR (300 MHz, CDC13) 8 1.50 (s, 18 H), 4.92 (s, 2H), 5.56 (br s, 2H), 7.05-7. 14 (m, 1H), 7.42- 7.53 (m, 1H). 19FNMR (282 MHz, CDC13) 8-142. 53 to-142.32 (m, 1F),-141. 3 to-141.0 (m, 1F). LCMS (ES+) m/z M+H 402.

Example 27b: To a stirred solution of Ex. 27a (0.45 g, 1.1 mmol) in pyridine (0. 35 ml) and dichloromethane (0. 5 ml) was added trifluoroacetic acid anhydride (0.35 ml, 2.5 mmol) while cooling in a water bath and stirring was continued at ambient temperature for 20 minutes. The reaction was concentrated in vacuo and the residue dissolved in ethyl acetate and washed with 1N sodium hydrogen sulfate, brine, dried over magnesium sulfate, filtered, and concentrated in vacuo to gave 0. 43 g as an off-white solid. 1HNMR (300 MHz, CDCl3) 51. 52 (s, 18H), 4.99 (s, 2H), 7.19-7. 26 (m, 1H), 7.82-7. 90 (m, 1H). 19FNMR (282 MHz, CDCl3) 6-141. 8 to- 141.6 (m, 1F),-133. 2 to-132.9 (m, 1F),-65. 6 (s, 3F). Example 27c : 1HNMR (300 MHz, DMSO-d6) 8 4.25 (s, 2H), 7.68- 7. 75 (m, 1H), 7. 97-8. 05 (m, 1H), 8. 73 (br s, 3H). 19FNMR (282 MHz, DMSO-d6) 8-139. 5 to-139.4 (m, 1F), -134. 7 to- 134.6 (m, 1F), -65. 0 (s, 3F).

Example 27 : 1HNMR (300 MHz, DMSO-d6) 5 1.23 (d, J = 6.3 Hz, 6H), 4.05-4. 20 (m, 1H), 4.41 (s, 2H), 4.46 (d, J = 5.7 Hz, 2H), 5.81 (s, 2H), 6.72 (s, 1H), 6.80 (s, 1H), 6.89-6. 95 (m, 2H), 7.33 (t, J = 6.7 Hz, 1H), 7.82-7. 90 (m, 1H), 8.78 (t, J = 5.8 Hz, 1H). 19FNMR (282 MHz, DMSO-d6) 5-142. 7 to- 142.5 (m, 1F),-135. 4 to-135.2 (m, 1F),-65. 0 (s, 3F), -62.0 (s, 3F). HRMS (ES) calcd for C2, H22N70, F, (M+H) : 632. 1651.

Found: 632.1674. Anal. Calcd for C26H21N7O3F8 + 0. 15 CH40H : C, 49.36 ; H, 3.42 ; N, 15.40. Found : C, 49.47 ; H, 3.33 ; N, 15.27.

EXAMPLE 28 Example 28: MH+ =626. 2 1HNMR : 400 MHz, CD30D : 7.86-7. 80 (d, 2H), 7.30-7. 40 (d, 2H), 7.00 (s, 1H), 6. 84-6.76 (d, 2H), 6. 62 (s, 1H), 4.50 (s, 2H), 4.40 (s, 2H) 4.08-4. 00 (m, 1H) and 1.40-1. 32 (m, 6H).

19FNMR : 400 MHz, CD30D : -66.0 (s, 3F) and-84.5 (s, 3F) Elemental analysis : C27H25N7O4F6 + 2xTFA + 1. 5xH2O Found C: 42.08 H: 3.46 N: 11.43 Calc. C: 42.28 H: 3.43 N: 11.13 Example 29 Example 29 : 1HNMR (300 MHz, DMSO-d6) 8 1.23 (d, J = 6.3 Hz, 6H), 4. 08-4. 20 (m, 1H), 4. 39-4. 48 (m, 4H), 5. 84 (s, 2H), 6. 73 (s, 1H), 6.80-6. 85 (m, 2H), 6.91-6. 96 (m, 2H), 7.46 (d, J = 8.4 Hz, 2H), 8.02 (d, J = 8.4 Hz, 2H), 8.72 (t, J = 5.7 Hz, 1H). 19FNMR (282 MHz, DMSO-d6) 8-61. 92 (s). HRMS (ES) calcd for C26H24N, 03F3C13 (M+H): 644.0953. Found: 644. 0984.

Anal. Calcd for C26H23N7O3F3Cl3: C, 48.43 ; H, 3.59 ; N, 15.20 ; Cl, 16.49. Found: C, 48.60 ; H, 3.56 ; N, 15.07 ; Cl, 16.28.

Example 30 Example 30 1HNMR (300 MHz, DMSO-d6) 6 1.15 (d, J = 6.6 Hz, 6H), 1. 23 (d, J = 6.6 Hz, 6H), 4. 03-4. 20 (m, 2H), 4. 36 (d, J = 5.4 Hz, 2H), 4.44 (s, 2H), 5.15 (s, 2H), 5.50 (br s, 2H), 6.68 (s, 1H), 6.72 (s, 1H), 6.83 (d, J = 8.1 Hz, 1H), 6.99 (s, 1H), 7.11 (s, 1H), 7.32 (d, J = 8.1 Hz, 2H), 7.36-7. 48 (m, 5H), 7.95 (d, J = 8.1 Hz, 2H), 8.03 (d, J = 7.5 Hz, 1H), 8.61 (t, J = 5.4 Hz, 1H) 9.22 (br s, 2H). HRMS (ES) calcd for C35H41N8O5 (M+H): 653.3194. Found: 653.3240. Anal.

Calcd for C35H40N8O5 + 0.1 water: C, 64.40 ; H, 6.18 ; N, 17. 17. Found: C, 64.23 ; H, 6.16 ; N, 16.97.

Example 31 2- [6- [3-amino-5- (trifluoromethyl) phenyl]-3- (isopropylamino)-<BR> 2-oxopyrazin-1 (2H) -yl]-N- (4- {imino [ (phenylsulfonyl) aminoamethyl} benzyl) acetamide Example 31: HRMS calcd for C30H30F3N7O4S1 (M+H): 642.2105. Found: 642.2148.

Anal. Calcd for C30H30F3N704S1 + 1. 6TFA+0.3H20 : C: 48.07 ; H: 3.91 ; N: 11.81.

Found: C: 48.10 ; H: 4.01 ; N: 11.72.

'H NMR (DMSO-d6, 300 MHz) 8 1. 26 (d, 6H), 2.63 (s, 1H), 4.12 (m, 2H), 4.36 (m, 4H), 6.77 (s, 1H), 6.81 (bs, 2H), 6.96 (s, 1H), 7.31 (d, 2H), 7.57-7. 66 (m, 3H), 7.83 (d, 2H), 7.96 (d, 2H), 8. 28 (s, 1H), 8. 69 (t, 1H), 9.10 (s, 1H).

Example 32 N- [3- (acetylamino)-1, 2-benzisoxazol-6-yl] methyl}-2- [6- (3- amino-5-methylphenyl)-3- (isopropylamino)-2-oxopyrazin-1 (2H) - yl] acetamide Example 32: HRMS calcd for C26H26F3N7O4 (M+H) : 558.2071 Found: 558.2088.

Anal. Calcd for C26H26F3N7O4 + 1.35TFA+0. 25H20: C: 48.14 ; H: 3.92 ; N: 13.69.

Found: C: 48.13 ; H: 4.91 ; N: 13.69.

'H NMR (DMSO-d6, 300 MHz) 5 1.26 (d, 6H), 2.12 (s, 3H), 4.13 (m, 2H), 4.42 (bs, 3H), 6.80 (d, 2H), 7.11 (d, 1H), 7.25 (s, 1H), 7.47 (bs, 1H), 7.75 (d, 2H), 7.83 (s, 1H), 8.17 (s, 1H), 8.72 (t, 1H), 10.45 (s, 1H).

Example 33 2- [6- [3-amino-5- (trifluoromethyl) phenyl]-3- (isopropylamino)- 2-oxopyrazin-1 (2H) -yl] -N- [4- (5-hydroxy-1, 2, 4-thiadiazol-3- yl) benzyl] acetamide Example 33a: Di (tert-butyl) 4- [amino (imino) methyl- benzylimidodicarbonate (2g, 5mmol) in 10ml CH2C12 was added perchloromethylmercaptan (0.83g, 4. 5mmol). The mixture was added NaOH/H20 (lg/1. 5ml) under-8°C and kept stirring for 7hrs, then quenched with water (50ml) and extracted with CH2C12 (3X25ml). The combined CH2C12 was then dried over MgS04, concentrated and purified on silica gel column to yield 0.2g solid. The solid in CH2C12 (2ml) was then added TFA (1. 5ml) at RT for lhr, then concentrated and purified on RP-HPLC to yield 1.3g solid (50%).

CigHOgS M. W. 407. 49.

Example 33 : HRMS calcd for C25H24F3N7O3S1 (M+H) : 560.1686. Found: 560.1709.

Anal. Calcd for C25H24F3N7O3S1 +0.6TFA+0. 85H20: C: 48.91 ; H: 4.12 ; N: 15.24.

Found: C: 48.93 ; H: 4.19 ; N: 15.19.

'H NMR (DMSO-d6, 300 MHz) 8 1.26 (d, 6H), 4.13 (m, 3H), 4.39 (m, 4H), 5.79 (s, 1H), 6.75 (s, 1H), 6. 80 (d, 2H), 6.95 (s,.

1H), 7.36 (d, 2H), 7.91 (d, 2H), 8.68 (t, 1H), 13.42 (s, 1H).

Example 34 N- (4- (Z) -amino [ (pyridin-2-ylmethoxy) imino] methyl} benzyl)-2- [6- [3-amino-5- (trifluoromethyl) phenyl]-3- (isopropylamino)-2- oxopyrazin-1 (2H)-yl] acetamide 2-(pyridin-2-ylmethyl)-1H-isoindole-1, 3 (2H)-dione Example 34a: To a round bottom flask containing 2- hydroxymethyl pyridine (5. 0 g, 45.8 mmol), N-hydroxy phthalimide (18.7 mg, 114.5 mmol) and triphenylphosphine (33. 7g, 128 mmol) in 800 ml of tetrahydrofuran was added diisopropyl azodicarboxylate (25.3 ml, 128 mmol) dropwise.

The solution was stirred overnight and then concentrated in vacuo. The residue was treated with 500 ml of ethyl acetate and extracted twice with 100 ml of 1M HC1. The combined aqueous layers were basified with 20 g of sodium bicarbonate and then treated with 150 ml of sodium bicarbonate (sat.) solution. The resulting precipitate was collected by vacuum filtration and dried over phosphorous pentoxide under high vacuum to give (7.2 g, 62% yield) of a white solid. MS-ESI (M+H) = 255.

2-[(aminooxy) methyl] pyridine Example 34b: To the product from Ex. 34a) (7.2 g, 28. 3 mmol) in 100 ml of methanol was added hydrazine (1.8 ml, 57.3 mmol) and the mixture was stirred over the weekend.

The mixture was filtered and concentrated in vacuo. The residue was purified by chromatography (silica, 10-20% MeOH: CH2Cl2) to give (1.23 g, 35% yield) of a solid. 1H NMR (400 MHz, CDC13) : 8 8.56 (d, 1 H), 7.68-7. 64 (m, 1 H), 7.34 (d, 1 H), 7.18 (t, 1 H), 5.59 (bs, 2 H), 4.79 (s, 2 H).

Example 34: 1H NMR (400 MHz, CD30D) : S 8.72 (d, 2 H), 8.40- 8.36 (m, 1 H), 7.96 (d, 1 H), 7.81 (t, 1 H), 7.54 (d, 2 H), 7. 25 (d, 2 H), 7.0 (s, 1 H), 6.84 (d, 2 H), 6.63 (s, 1 H), 5.32 (s, 2 H), 4.51 (s, 2 H), 4.37 (d, 2 H), 4.03-4. 00 (m, 1 H), 1.36 (d, 6 H); MS-ESI (M+H) = 609 ; Analysis: C30H31F3Nt303 + 3.0 TFA + 1.1 H20 calcd: C, 45.26 ; H, 3.73 ; N, 11.72 ; O, 15.4 ; found: C, 44.58 ; H, 3.59 ; N, 11.41 ; O, 14.93.

EXAMPLE 35 Example 35a: This compound was isolated from the crude reaction mixture of example 23, on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the title product at 28% AcN, 0. 05 g (15%) as a hygroscopic solid.

MH+ =496. 2 1HNMR : 400 MHz, CD30D : 7.68-7. 60 (d, 2H), 7.50-7. 42 (d, 2H), 6.64 (s, 1H), 6.48 (s, 1H), 6.42-6. 36 (d, 2H), 4.59 (s, 2H), 4.50-4. 42 (d, 2H), 4.10-3. 98 (m, 1H), 3.70 (s, 3H) and 1.40-1. 32 (m, 6H).

Elemental analysis: C24H29N, 05 + 2.5xTFA + 1. 2xH20 Found C: 43.43 H: 4.28 N: 11.69 Calc. C: 43.42 H: 4.26 N: 12.22 Example 36 3-amino-5- [l- [2- ({4- [ (Z)- amino (hydroxyimino) methyl] benzyl} amino)-2-oxoethyl]-3- chloro-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2- yl]benzoic acid methyl 3-amino-5- [3-chloro-l- {2- [ (4-cyanobenzyl) amino-2- oxoethyl}-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2- yl] benzoate Example 36a) 1H NMR (400 MHz, CD30D) : # 7.64 (d, 2 H), 7.40 (t, 1 H), 7.31 (d, 2 H), 7.17 (t, 1 H), 6.81 (t, 1 H), 4.44 (s, 2 H), 4. 37 (s, 2 H), 4.18-4. 14 (m, 1 H), 3. 84 (s, 3 H), 1.26 (d, 6 H) ; MS-ESI (M+H) = 509/510.

3-amino-5- [3-chloro-l- {2- [ (4-cyanobenzyl) aIrLino]-2-oxOethyl}- 5- (isopropylamino)-6-oxo-l, 6-dihydropyrazin-2-yl] benzoic acid Example 36b: To a solution of Example 36a (0.60 g, 1.18 mmol) in THF: MeOH: H20 (7: 2: 1) was added LiOH*H20 (0. 09 g, 2.36 mmol) at room temperature. The reaction was stirred at room temperature overnight and then acidified with acetic acid. The solvent was removed in vacuo to give a foam (0. 58 g, 107%), which was used without further purification in the next step. MS-ESI (M+H) = 496/497.

Example 36c: To a solution of Example 36b (0.58 g, 1.10 mmol) in ethanol (15 mL) at room temperature was added K2CO3 (0. 6 g, 4.84 mmol), DIEA (0. 84 mL, 4.84 mmol) and H, NOH*HC1 (0. 17 g, 2.42 mmol). The reaction mixture was heated to 75 °C for 2 hrs and then allowed to cool to room temperature.

The solid was filtered and washed with ethanol. The filtrate was concentrated and acidified with TFA. The crude mixture was purified by RP-HPLC (CH3CN : H2O) to give after lypholization the desired product (0. 28 g). 1H NMR (400 MHz, CD30D) : 5 7. 62 (d, 2 H), 7.44 (t, 1 H), 7.40 (d, 2 H), 7.25 (t, 1 H), 6.86 (t, 1 H), 4.45 (s, 2 H), 4.41 (s, 2 H), 4.14- 4.18 (m, 1 H), 1.26 (d, 6 H) ; MS-ESI (M+H) = 528/529 ; Analysis: C24H26ClN70s+ 1.75 TFA + 0.8 H20 calcd: C, 44.51 ; H, 3.98 ; N, 13.21 ; O, 20.05 ; found: C, 44.52 ; H, 4.08 ; N, 13.18 ; O, 19.98.

Example 37 Example 37 : 1H NMR (400 MHz, CD30D) : 8 7.72 (d, 2 H), 7.49- 7. 37 (m, 7 H), 7. 22 (t, 1 H), 6. 84 (t, 1 H), 5. 39 (s, 2 H), 4.46 (s, 2 H), 4.40 (s, 2 H), 4.19-4. 13 (m, 1 H), 1.27-1. 25 (m, 6 H) ; MS-ESI (M+H) = 646/647 ; Analysis: C32H32ClN7O6 + 2.15 TFA + 1. 15 H20 calcd: C, 47.62 ; H, 4.05 ; N, 10.7 ; found: C, 47.61 ; H, 4.03 ; N, 10.72.

Example 38 benzyl (lE)-amino {4- [ ( { [6- (3-amino-5- {[(benzyl)amino]carbonyl}phenyl)-3-(isopropylamino)-2- oxopyrazin-l (2H) - yl] acetyl} amino) methyl] phenyl} methylidenecarbamate [6- {3-amino-5- [ (benzylamino) carbonyl] phenyl}-3- (isopropylamino)-2-oxopyrazin-1 (2H)-yl] acetic acid Example 38a : 1H NMR (400 MHz, CD30D) : # 7.34-7. 19 (m, 7 H), 6.94 (t, 1 H), 6.63 (s, 1 H), 4.54 (s, 2 H), 4.52 (s, 2 H), 4.04-4. 00 (m, 1 H), 1.39 (d, 2 H) ; MS-ESI (M+H) = 436.

Example 38b : 1H NMR (400 MHz, CD30D) : 8 7.65 (d, 2 H), 7.51-7. 19 (m, 13 H), 7.05 (t, 1 H), 6.86 (t, 1 H), 6.66 (s, 1 H), 5. 41 (s, 2 H), 4. 66 (s, 2 H), 4. 51 (s, 2 H), 4. 42-4. 40 (m, 2 H), 4. 07-4. 03 (m, 1 H), 1. 37 (d, 2 H) ; MS-ESI (M+H) = 701; Analysis: C39H40N8O5 + 2.6 TFA +0.5 H20 calcd: C, 52.75 ; H, 4.36 ; N, 11.13 ; found: C, 52.75 ; H, 4.38 ; N, 11.1.

Example 39 2,6-difluorobenzyl {4- [ ( { [6- [3-amino-5- (isobutyrylamino) phenyl]-3- (isopropylamino)-2-oxopyrazin- 1 (2H)-yl] acetyl} amino) methyl] phenyl} (imino) methylcarbamate Example 39) Tert-butyl 3- [1- [2- ( {4- [amino (imino) methyl] benzyl} amino) -2-oxoethyl]-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2-yl]-5- (isobutyrylamino) phenylcarbamate (0. 2g, 0. 32mmol) and 2,6- difluorobenzyl 4-nitrophenyl carbonate (120mg, 0. 39mmol) in THF (2ml) was added NMM (40mg, 0. 40mmol). The mixture was kept stirring for 3hr. The mixture was concentrated and then TFA/CH2C12 was added. The mixture was kept stirring at RT for lhr, then concentrated and purified on RP-HPLC to yield 125mg of solid (41%).

C35H38F2N. 05 M. W. 688.72.

Anal. Calcd for C35H38F2N8OT +2.2TFA+0. 25H20: C: 50.12 ; H: 4.34 ; N: 11.86.

Found: C: 50.20 ; H: 4.46 ; N: 11.68.

1H NMR (DMSO-d6, 300 MHz) 8 1.07 (d, 6H), 1.23 (d, 6H), 2.10 (s, 2H), 4.12 (m, 3H), 4.38 (d, 2H), 4.44 (s, 2H), 5.38 (s, 2H), 6.31 (s, 1H), 6.67 (bs, 1H), 6.81 (s, 1H), 7.12 (s, 1H), 7.23 (t, 2H), 7.38 (d, 2H), 7.59 (m, 1H), 7.79 (d, 2H), 8. 67 (t, 1H), 9. 73 (s, 1H).

Example 40 N-{3-amino-5-[1-[2-({4- [ [ (anilinocarbonyl) anino] (imino) methyl] benzyl} amino)-2- oxoethyl]-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2- yl] phenyl}-2-methylpropanamide Example 40: Tert-butyl 3- [1- [2- ( {4- [amino (imino) methyl] benzyl} amino)-2-oxoethyl]-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2-yl]-5- (isobutyrylamino) phenylcarbamate (0. 18g, 0. 29mmol) and isocyanatobenzene (42mg, 0. 35mmol) in THF (2ml) was added NMM (40mg, 0.40mmol). The mixture was kept stirring for 3hr. The mixture was concentrated and then TFA/CH2C12 was added. The mixture was kept stirring at RT for lhr, then concentrated and purified on RP-HPLC to yield 85mg of solid (33%).

HRMS calcd for C34H39Ng04 (M+H): 638.3198. Found: 638.3162.

Anal. Calcd for C34H39N9O4 + 2. 2TFA +0.45H20 : C: 51.43 ; H: 4.73 ; N: 14.05.

Found: C: 51.47 ; H: 4.80 ; N: 13.90.

'H NMR (DMSO-d6, 300 MHz) 6 1.09 (d, 6H), 1.24 (d, 6H), 4.12 (m, 3H), 4.41 (d, 2H), 4.47 (s, 2H), 6.30 (s, 1H), 6.67 (s, 1H), 6.80 (s, 1H), 7.10 (s, 1H), 7.17 (t, 1H), 7.42 (t, 2H), 7.48 (d, 2H), 7.58 (d, 2H), 7.88 (d, 2H), 8.71 (t, 1H), 9.72 (s, 1H).

Example 41 N- {3-amino-5- [l- [2- ( {4- [{[(benzylamino)carbonothioyl]amino}(imino)methyl]benzyl}ami no)-2-oxoethyl]-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin- 2-yl] phenyl}-2-methylpropanamide Example 41: Tert-butyl 3- [1- [2- ( {4- [amino (imino) methyl] benzyl} amino)-2-oxoethyl]-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2-yl]-5- (isobutyrylamino) phenylcarbamate (0. 18g, 0.29mmol) and (isothiocyanatomethyl) benzene (52mg, 0. 35mmol) in THF (2ml) was added NMM (40mg, 0. 40mmol). The mixture was kept stirring for 3hr. The mixture was concentrated and then TFA/CH2C12 was added. The mixture was kept stirring at RT for lhr, then concentrated and purified on RP-HPLC to yield 85mg of solid (30%).

HRMS calcd for C35H41N9O3S1 (M+H): 668.3126. Found: 668. 3141.

Anal. Calcd for C3sH4lNg03Sl + 2.45TFA +0.75H20 : C: 49.88 ; H: 4.71 ; N: 13.12.

Found: C: 49.92 ; H: 4.75 ; N: 13.01.

'H NMR (DMSO-d6, 300 MHz) b 1.08 (d, 6H), 1.24 (d, 6H), 4.12 (m, 2H), 4.36 (t, 2H), 4. 44 (m, 2H), 4.63 (d, 1H), 4.77 (d, 1H), 6.36 (s, 1H), 6.68 (s, 1H), 6.87 (s, 1H), 7.17 (s, 1H), 7.33 (m, 6H), 7.89 (t, 2H), 8.65 (t, 1H), 9.77 (s, 1H).

Example 42 N-{3-amino-5-[1-[2-({4- [{[(benzylamino)carbonyl]amino} (imino) methyl) benzyl} amino)- <BR> <BR> 2-oxoethyl]-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2- yl] phenyl}-2-methylpropanamide Example 42: Tert-butyl 3- [1- [2- (f4- [amino (imino) methyl] benzyl} amino)-2-oxoethyl]-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2-yl]-5- (isobutyrylamino) phenylcarbamate (0. 18g, 0.29mmol) and (isocyanatomethyl) benzene (52mg, 0.39mmol) in THF (2ml) was added NMM (40mg, 0. 40mmol). The mixture was kept stirring for 3hr. The mixture was concentrated and then TFA/CH2C12 was added. The mixture was kept stirring at RT for lhr, then concentrated and purified on RP-HPLC to yield 104mg of solid (40%).

HRMS calcd for C3sH4lN904 (M+H): 652.3354. Found: 652.3368.

Anal. Calcd for C35H41N304 + 2. 1TFA +1. OH20 : C: 52.83 ; H: 4.87 ; N: 14.14.

Found: C: 53.07 ; H: 5.04 ; N: 13.35.

'H NMR (DMSO-d6, 300 MHz) # 1. 08 (d, 6H), 1. 23 (d, 6H), 1. 89 (s, 1H), 4.09 (m, 2H), 4.27 (d, 1H), 4.40 (d, 2H), 4.45 (m, 3H), 6.30 (s, 1H), 6.67 (s, 1H), 6.81 (s, 1H), 7.11 (s, 1H), 7.31 (m, 6H), 7.48 (d, 2H), 7.78 (d, 2H), 7.93 (t, 1H), 8.71 (t, 1H), 9.72 (s, 1H), 10.65 (s, 1H).

Example 43 Example 43a: LCMS (ES+) m/z M+H 502.

Example 43 : 1HNMR (300 MHz, DMSO-d6) 5 1.14 (d, J = 6.9 Hz, 6H), 1. 25 (d, J = 6.3 Hz, 6H), 4. 02-4. 18 (m, 2H), 4. 36 (d, J = 5.1 Hz, 2H), 4. 44 (s, 2H), 6.72 (s, 1H), 6. 73 (s, 1H), 7.04 (s, 1H), 7.16 (s, 1H), 7.39 (d, J = 8.1 Hz, 2H) ), 7. 66.

(d, J = 8.1 Hz, 2H), 8. 08 (d, J = 7.8 Hz, 1H), 8. 70 (t, J = 5.4 Hz, 1H), 9. 08 (br s, 2H), 11. 20 (br s, 1H). HRMS (ES) calcd for C27H36N8O4 (M+H) : 535. 2776. Found: 535.2744.

Anal. Calcd for C27H35N8O4 + 2. 75 TFA + 0. 75 H20 : C, 45.3 ; H, 4.47 ; N, 13.0. Found: C, 45.28 ; H, 4.48 ; N, 13.0.

Example 44 Example 44a: LCMS (ES+) m/z M+H 408. Example 44b: Example 44a (0.5 g, 1.2 mmol) was stirred with 4 N hydrogen chloride in dioxane (6 ml) for 2 hours and concentrated in vacuo to give an off-white solid. Material was used without further purification. LCMS (ES+) m/z M+H.

208.

Example 44 : 1HNMR (300 MHz, DMSO-d6) 8 1.14 (d, J = 6. 6 Hz, 6H), 1.25 (d, J = 6.6 Hz, 6H), 4.01-4. 17 (m, 2H), 4.35 (d, J = 4.8 Hz, 2H), 4. 43 (s, 2H), 6.73 (s, 2H), 7.05 (s, 1H), 7.17 (s, 1H), 7.35 (d, J = 8.4 Hz, 2H), 7.90 (d, J = 8.1 Hz, 2H), 8.07 (d, J = 7.8 Hz, 1H), 8.60-8. 68 (m, 1H), 13.40 (br s, 1H). HRMS (ES) calcd for C33H36N7O6 (M+H): 626.2722.

Found: 626.2723. Anal. Calcd for C33H3sN706 + 2.05 TFA + 0.75 H20 : C, 51.04 ; H, 4.45 ; N, 11.23. Found: C, 51.09 ; H, 4.49 ; N, 11.16.

Example 45 benzyl {4-[({[6-[3-amino-5-({[(1R)-1- <BR> methylpropyl] amino} carbonyl) phenyl]-3-(isopropylamino)-2- oxopyrazin-l (2H) - yl] acetyl} amino) methyl] phenyl} (imino) methylcarbamate Example 45: (0. 72g, l. 8mmol), benzyl [4- (aminomethyl) phenyl] (imino) methylcarbamate (640mg, 2mmol), TBTU (642mg, 2mmol) and DIEA (1.8g, 14mmol) in 20ml of DMF was kept stirring at RT for 2hr. The mixture was added 10ml EtOAc and 50ml water, then extracted with EtOAc (3X20ml). The combined EtOAc was then concentrated and purified on RP-HPLC to yield 520mg white solid (31%).

HRMS calcd for C36H42NsO5 (M+H): 667.3351. Found : 667.3308.

Anal. Calcd for C36H42NsO5 + 2.15TFA +0.7H20 : C: 52.35 ; H: 4.96 ; N: 12.11.

Found: C: 52.36 ; H: 5.00 ; N: 12.10.

'H NMR (DMSO-d6, 300 MHz) 8 0.85 (t, 3H), 1.10 (d, 3H), 1. 24 (m, 6H), 1.48 (m, 2H), 3.89 (m, 1H), 4.11 (m, 1H), 4.39 (m, 3H), 4.45 (bs, 1H), 5.37 (s, 2H), 6.71 (d, 2H), 7.01 (s, 1H), 7.13 (s, 6H), 7.39-7. 49 (m, 6H), 7.77 (d, 2H), 8.00 (d, 1H), 8.71 (t, 1H), 10.49 (bs, 1H).

Example 46 Example 46a: LCMS (ES+) m/z M+H 488.

Example 46b: LCMS (ES+) m/z M+H 488.

Example 46c: Example 46a (1.02 g, 2. 1 mmol) was stirred with 4N hydrogen chloride in dioxane for 18 hours, heated at 60 °C for 1 hour followed by the addition of 6N hydrogen chloride solution (1 ml) to the warm reaction and stirred for an additional 30 minutes. The reaction was concentrated in vacuo, dissolved in ethanol and again concentrated in vacuo to give 0. 98 g (100% yield) of a yellow solid. LCMS (ES+) m/z M+H 432.

Example 46d: A suspension of Example 46c (0. 97 g, 2.1 mmol) with 10% palladium on carbon (1.0 g) in ethanol was shaken under 42 psi hydrogen for 1 hour. The reaction was filtered and concentrated in vacuo to give 0. 81 g (89% yield) of a yellow solid. LCMS (ES+) m/z M+H 402.

Example 46 : 1HNMR (300 MHz, DMSO-d6) 8 0.85 (t, J = 7.5 Hz, 3H), 1.10 (d, J = 6.6 Hz, 3H), 1. 22 (d, J = 6.6 Hz, 6H), 1.40-1. 58 (m, 2H), 3.82-3. 98 (m, 1H), 4.01-4. 19 (m, 1H), 4.34 (d, J = 5.4 Hz, 2H), 4.42 (s, 2H), 5.13 (s, 2H), 5.45 (s, 2H), 6.67 (s, 1H), 6.71 (s, 1H), 6.81 (d, J = 8.1 Hz, 1H), 6.98 (s, 1H), 7.10 (s, 1H), 7.31 (d, J = 8.1 Hz, 2H), 7.33-7.46 (m, 5H), 7.94 (d, J = 8.1 Hz, 2H), 8.60 (t, J = 5.4 Hz, 1H), 9.14 (br s, 2H). HRMS (ES) calcd for C36H43N805 (M+H): 667.3351. Found: 667.3355. Anal. Calcd for C36Hq2NgO5 + 0.35 ethyl acetate + 0.35 water: C, 63.99 ; H, 6.46 ;'N, 16. 22. Found: C, 64.02 ; H, 6.37 ; N, 16.26.

Example 47 Example 47a: To the (2, 6-dichlorophenyl) methanol (5g, 28. 4mmol) and NMM (6.85g, 68.2mmol) in 100ml of CH2C12 at 0°C was added 4-nitrophenyl chloridocarbonate (6. 85g, 34. lmmol). The mixture was allowed to RT after lhr and stirred overnight. Then the mixture was recrystallized in CH2C12/Hexane and filtered. The liquid was then concentrated to yield 4.2g solid (43%).

Cl4HgCl2Nl05 M. W. 342.13 Example 47: Example 47a (0. 3g, 0. 58mmol) and 2,6- dichlorobenzyl 4-nitrophenyl carbonate (200mg, 0. 58mmol) in DMF (2ml) was added NMM (240mg, 2. 4mmol). The mixture was kept stirring overnight and purified on RP-HPLC to yield 120mg of solid (22%).

C32H3lCl2N706 M. W. 6 8 0. 54.

Anal. Calcd for C32H3lCl2N706 + 2.05TFA +0.9H20 : C: 46.59 ; H: 3.77 ; N: 10.53.

Found: C: 46.60 ; H: 3.81 ; N: 10.50.

1H NMR (DMSO-d6, 300 MHz) 5 1.24 (d, 6H), 4.11 (m, 3H), 4.39 (m, 4H), 5.54 (s, 2H), 6.75 (d, 2H), 7.11 (s, 1H), 7.28 (s, 1H), 7.38 (d, 2H), 7.54 (d, 1H), 7.62 (d, 2H), 7.79 (d, 2H), 8.66 (t, 1H), 10.26 (bs, 1H).

Example 48 HRMS calcd for C36H42N806 (M+H): 683.3300. Found: 683.3326.

Anal. Calcd for C36H42N8O6 + 1.9TFA +0.05H20 : C: 52.46 ; H: 4.99 ; N: 12.61.

Found: C : 52.53 ; H: 5.00 ; N: 12.38.

'H NMR (DMSO-d6, 300 MHz) 8 0.86 (t, 3H), 1.12 (d, 3H), 1.24 (m, 6H), 1.49 (m, 2H), 4.26 (m, 2H), 4.42 (m, 2H), 5.29 (s, 2H), 6.74 (bs, 3H), 6.83 (s, 1H), 7.04 (s, 1H), 7.15 (s, 1H), 7.38-7. 52 (m, 6H), 7.66 (d, 1H), 8.06 (d, 1H), 8.64 (bs, 1H), 10.14 (bs, 1H).

Example 49 HRMS calcd for C29H34N8O5 (M+H): 575.2725. Found: 575.2757.

Anal. Calcd for C29H34N8O5 + 1.85TFA +1.3H20 : C: 48.54 ; H: 4.79 ; N: 13. 85.

Found: C: 48.58 ; H: 4.86 ; N: 13.73.

'H NMR (DMSO-d6, 300 MHz) 5 0.87 (t, 3H), 1.12 (d, 3H), 1.26 (d, 6H), 1.49 (m, 2H), 3.90 (m, 1H), 4.39 (d, 3H), 4.45 (s, 2H), 6.75 (s, 2H), 7.07 (s, 1H),, 7.13-7. 18 (m, 2H), 8.02 (m, 2H), 8.73 (m, 2H).

Example 50 NH2 Nu2 / . ". N N N O H 0 --N IyN 0 0 H NH 0 /-N OH NH2 NH NH2 wle 50 CbZ Example 50 : Intermediate 1 (0. 3g, 0. 55mmol) and benzyl 4- nitrophenyl carbonate (149mg, 0. 55mmol) in DMF (2ml) was added NMM (240mg, 2.4mmol). The mixture was kept stirring overnight and purified on RP-HPLC to yield 120mg of solid (26%).

HRMS calcd for C36H42N806 (M+H): 683.3300. Found: 683.3278.

Anal. Calcd for C36H42N806 + 1.2TFA +1. 05H20 : C: 55.00 ; H: 5.44 ; N: 13.36.

Found: C: 54.99 ; H: 5.41 ; N: 13.43.

'H NMR (DMSO-d6, 300 MHz) 8 0.86 (t, 3H), 1.12 (d, 3H), 1.24 (m, 6H), 1.48 (m, 2H), 3.88 (m, 2H), 4.11 (m, 2H), 4.25 (d, 2H), 4.42 (m, 2H), 5.25 (s, 2H), 6.73 (bs, 3H), 6.80 (s, 1H), 7.01 (s, 1H), 7.13 (s, 1H), 7.38-7. 46 (m, 4H), 7.73 (d, 1H), 8. 00 (m, 2H), 8.61 (bs, 1H), 9.94 (bs, 1H).

Example 51 Example 51a: To the (3-methoxyphenyl) methanol (5g, 36mmol) and NMM (6.85g, 68. 2mmol) in 100ml of CH2C12 at 0°C was added 4-nitrophenyl chloridocarbonate (6.58g, 32. 6mmol). The mixture was allowed to RT after 1hr and stirred overnight.

Then the mixture was recrystallized in CH2C12/Hexane and filtered. The liquid was then concentrated to yield 4. 2g solid (38. 5%).

Example 51: Intermediate 1 (0.3g, 0.58mmol) and (3- methoxybenzyl) -4-nitrophenyl carbonate (176mg, 0.58mmol) in DMF (2ml) was added NMM (240mg, 2. 4mmol). The mixture was kept stirring overnight and purified on RP-HPLC to yield 120mg white solid (24%).

HRMS calcd for C33H35N7O7 (M+H): 642.2671. Found: 642.2704.

Anal. Calcd for C33H3sN70, + 1.65TFA+0. 9H20: C: 51.53 ; H: 4.58 ; N: 11.58.

Found: C: 51.54 ; H: 4.66 ; N: 11.50.

'H NMR (DMSO-d6, 300 MHz) 5 1.24 (d, 6H), 3.80 (S, 3H), 4.11 (m, 3H), 4.39 (m, 5H), 5.32 (s, 2H), 6.71 (s, 1H), 6.76 (s, 1H), 6.98 (d, 2H), 7.06 (m, 3H), 7.11 (s, 1H), 7.27 (s, 1H), 7.40 (d, 2H), 7.79 (d, 2H), 8.69 (t, 2H).

Example 52 N- [4- ( (E)-amino { [ (4-fluorobenzyl) oxy] imino} methyl) benzyl]-2- [6- [3-amino-5- (trifluoromethyl) phenyl-3- (isopropylamino) -2- oxopyrazin-l (2H)-yl] acetamide trifluoroacetate Example 52a: In a round bottom flask with a magnetic stirrer, under nitrogen, di (tert-butyl) imidodicarbonate (24.38 g, 112 mmol) was combined with tetrahydrofuran (150 ml) and sodium hydride (4.49 g, 112 mmol). The reaction foam and off-gas for 16 minutes. To the reaction mixture 4- (bromomethyl) benzonitrile (20.0 g, 102 mmol) and stirred for 18 hours. Reaction mixture was washed with sat KHS04 (2 x 100 ml), water (2 x 100 ml), dried over magnesium sulfate, filtered and concentrated to give 36.59 g (100% crude yield) of a white solid, di (tert-butyl) 4- cyanobenzylimidodicarbonate.

Mass Spectrometry (Electrospray): M+Na 355.1 NMR (400 MHz, CDC13) 1H : 7.573 ppm (d, 2H), 7.352 ppm (d, 2H), 4.775 ppm (s, 2H), 1.410 ppm (s, 18H).

Example 52b: In a round bottom flask with a magnetic stirrer, heating mantel, and a cold water condenser, under nitrogen, di (tert-butyl) 4-cyanobenzylimidodicarbonate (10.31 g, 31.02 mmol) was combined with ethanol, diisopropyl ethyl amine (27.02 ml, 155 mmol), and hydroxylamine (10.78 g, 155 mmol). The reaction mixture refluxed 2 hours. The reaction mixture was allowed to cold to room temperature, concentrated and then dissolved in ethyl acetate (200 ml).

The ethyl acetate mixture was washed with NaHCO3 (2xlOO ml), dried over magnesium sulfate, filtered and concentrated to give 9.5 g (84% crude yield) of a white solid, di (tert- butyl) 4- [ (Z)-amino (hydroxyimino) methyls benzylimidodicarbonate.

Mass Spectrometry (Electrospray): M+H 366.1 NMR (400 MHz, DMSO) 1H : 7.602 ppm (d, 2H), 7.193 ppm (d, 1H), 6.997 ppm (d, 1H), 4.341 ppm (s, 2H), 1.271 ppm (s, 18H).

Example 52c: In a round bottom flask with a magnetic stirrer, under nitrogen, di (tert-butyl) 4- [ (Z)- amino (hydroxyimino) methyls benzylimidodicarbonate (10.9 g, 29.83 mmol) was combined with ammonium formate (4.76 g, 75.48 mmol) and methanol (50 ml). To the reaction palladium black (0. 34 g, 3.19 mmol) was added and stirred 4 hours. The reaction mixture was filtered, and concentrated to give 11.27 g (100 crude yield) of a white solid, di (tert- butyl) 4- [amino (imino) methyl] benzylimido-dicarbonate.

Mass Spectrometry (Electrospray): M+H 350.1 NMR (400 MHz, CDC13) 1H : 7.573 ppm (d, 2H), 7.286 ppm (d, 2H), 4.775 ppm (s, 2H), 1.445 ppm (s, 18H).

Example 52d: In a round bottom flask with a magnetic stirrer, under nitrogen, heating mantel, cold water condenser di (tert-butyl) 4- [amino (imino) methyl] benzylimido- dicarbonate (2.31 g, 5.65 mmol), was combined with diisopropyl ethyl amine (2.19 g, 16.95 mmol), ethanol (50 ml), and 1-[(aminooxy) methyl]-4-fluorobenzene hydrochloride (2.0 g, 11.29 mmol). The reaction mixture refluxed for 6 hours. The reaction mixture was concentrated to give 4.74 g of an orangish oil. The crude product was chromatographed on silica with ethyl acetate and hexane. Elution began at 10% ethyl acetate and finished at 20% ethyl acetate. 1.4 g of a white solid, di (tert-butyl) 4-((E)-amino {[(4- fluorobenzyl) oxy] imino} methyl) benzylimido dicarbonate, (52% yield), was recovered.

Mass Spectrometry (Electrospray): M+H 474.3 NMR (400 MHz, CDC13) 1H : 7.557 ppm (d, 2H), 7.374 ppm (dd, 2H), 7.259 ppm (d, 2H), 7.005 ppm (d, 2H), 5.051 ppm (s, 2H), 4,842 NMR (400 MHz, CDC13) 19F :-115. 079 ppm (sextet, 1F) Example 52e: In a round bottom flask with a magnetic stirrer, under nitrogen di (tert-butyl) 4- ((E)-amino{[(4- fluorobenzyl) oxy] imino} methyl) benzyl imidodicarbonate (0. 45 g, 0.95 mmol) was dissolve in 4M HC1 in dioxane (20 ml, 80 mmol) and stirred 3 hours. The reaction mixture was concentrated to give a white solid, (0. 40 g, 100% crude yield), 4- (aminomethyl)-N'- [ (4- fluorobenzyl) oxy] benzenecarbox imidamide hydrochloride.

Mass Spectrometry (Electrospray): M+H 274.1 NMR (400 MHz, CD30D) 1H : 7.686 ppm (s, 4H), 7.592 ppm (dd, 2H), 7.160 ppm (t, 2H), 5.114 ppm (s, 2H), 4.225 ppm (s, <BR> <BR> 2H).

NMR (400 MHz, CD30D) 19F :-114. 389 ppm (br s, 1F).

Example 52f: In a round bottom flask with a magnetic stirrer, under nitrogen, heating mantel, thermocouple, and a cold water condenser was added 3-bromo-5- (trifluoromethyl) aniline (1.0 g, 4.17 mmol), dimethyl sulfoxide (50 ml), 4,4, 4', 4', 5,5, 5', 5'-octamethyl-2, 2'-bi- 1,3, 2-dioxaborolane (1.06g, 4.17 mmol), potassium acetate (1.23 g, 12.50 mmol). The reaction stirred 30 minutes while argon was bubbled through the solution. To the reaction mixture was added [1, 1'-bis (diphenylphosphino) - ferrocene] dichloropalladium (ll), complex with dichloromethane (1 : 1) (0. 102 g, 0. 125 mmol). The reaction was heated to 84 °C and stirred for 18 hours. The reaction mixture was allowed to cool to room temperature and then brine (100 ml) and ethyl acetate (100 ml) was added and stirred 30 minutes. The organic layer was separated was further washed with brine (2 x 100 ml), dried over magnesium sulfate, filtered through silica, and concentrated to give 3.04 g (91% crude yield) of a black oil, 3- (4, 4,5, 5- tetramethyl-l, 3,2-dioxaborolan-2-yl)-5- (trifluoromethyl) aniline.

Mass Spectrometry (Electrospray): M+H 288.1 NMR (400 MHz, CDC13) 1H : 7.411 ppm (s, 1H), 7.244 ppm (s, 1H), 6. 946 ppm (s, 1H), 3. 730 ppm (br s, 2H), 1. 314 ppm (s, 12H).

NMR (400 MHz, CI) 30D) 19F :-63. 141 ppm (s, 3F).

Example 52g: In a round flask with a magnetic stirrer, under nitrogen, heating mantel, cold water condenser was added 3- (4, 4,5, 5-tetramethyl-1, 3,2-dioxaborolan-2-yl)-5- (trifluoromethyl) aniline (5. 0 g, 17.4 mmol), tert-butyl [6- bromo-3-(isopropylamino)-2-oxopyrazin-l (2H)-yl] acetate (5.42 g, 15.8 mmol), cesium carbonate (6.19 g, 19.0 mmol) and dioxane (100 ml). The reaction mixture stirred 30 minutes while argon was bubbled through the solution. To the reaction mixture was added tetrakis (triphenylphosphine) palladium (0) and reflux 15 hours. The reaction mixture was allowed to cool to room temperature and then was filter through celite/silica plug.

The plug was washed ethyl acetate (100 ml). The organics were combined and concentrate to give 10.81 g reddish black oil. The oil was dissolved in dichloromethane and chromatograph on silica. The silica column was eluded with 1% ethanol and 99% dichloromethane. 6.2 g (93% yield) of a dark reddish brown oil, tert-butyl [6- [3-amino-5- (trifluoromethyl) phenyl]-3-(isopropylamino)-2-oxopyrazin- 1 (2H)-yl] acetate.

Mass Spectrometry (Electrospray): M+H 427.5 NMR (400 MHz, CDC13) 1H : 6.921 ppm (d, 2H), 6.771 ppm (s, 1H), 6.743 ppm (s, 1H), 6.105 ppm (br s, 1H), 4.349 ppm (s, 2H), 4.178 ppm (m, 1H), 3.988 ppm (br s, 1H), 1.413 ppm (s, 9H), 1. 265 ppm (d, 6H).

NMR (400 MHz, CD30D) 19F : -63.409 ppm (s, 3F).

Example 52h: In a round bottom flask with a magnetic stirrer, under nitrogen was added tert-butyl [6- [3-amino-5- (trifluoromethyl) phenyl]-3- (isopropylamino)-2-oxopyrazin- 1 (2H)-yl] acetate (20.50 g, 48.08 mmol) and 4M HC1 in dioxane (100 ml, 400 mmol). The reaction mixture stirred for 12 hour. The reaction mixture was concentrated to give 20.78 g (100% yield) of a white solid, [6- [3-amino-5- (trifluoromethyl) phenyl]-3- (isopropylamino)-2-oxopyrazin- 1 (2H)-yl] acetic acid dihydrochloride.

Elemental analysis: C-42.21, H-4.33, N-12.22, F- 12.05 Mass Spectrometry (Electrospray): M+H 371.0 NMR (400 MHz, D20) 1H : 7.653 ppm (s, 1H), 7.607 ppm (s, 1H), 7.443 ppm (s, 1H), 6.657 ppm (s, 1H), 4.341 ppm (s, 2H), 3.885 ppm (pentet, 1 H), 1.231 ppm (d, 6H).

NMR (400 MHz, D20) 19F :-63. 311 ppm (s, 3F).

Example 52: In a round bottom flask, with a magnetic stirrer, under nitrogen, was added the product from Ex-. 52e, 4- (aminomethyl)-N'- [ (4-fluorobenzyl) oxy] benzenecarbox imidamide hydrochloride (0. 40 g, 1.16 mmol), the product from Ex-52h, [6- [3-amino-5- (trifluoromethyl) phenyl]-3- (isopropylamino)-2-oxopyrazin-1 (2H)-yl] acetic acid dihydrochloride (0.77 g, 1.74 mmol), dimethyl formamide (50 ml), diisopropyl ethyl amine (1.12 g, 8.69 mmol), and 0- (1H- benzotriazol-l-yl)-N, N, N', N'-pentamethylene-uronium tetrafluoroborate (1.30 g, 4.06 mmol). The reaction stirred at room temperature for 18 hours. The reaction was concentrated to 3.89 g of a reddish oil. The oil was dissolved in acetonitrile (25 ml) and water (50 ml) and acidified with acetic acid (1 ml). The reaction mixture was chromatographed by HPLC, 10 to 50% acetonitrile. over 30 minutes. 0.592 g (59% yield) of N- [4- ( (Z)-aminof [ (4- fluorobenzyl) oxy] imino} methyl) benzyl]-2- [6- [3-amino-5- (trifluoromethyl) phenyl]-3- (isopropylamino)-2-oxopyrazin- 1 (2H)-yl] acetamide bis (trifluoroacetate).

Elemental analysis: C-49.63, H-3.86, N-11.14, F- 20.37 NMR (400 MHz, CD30D) 1H : 7.538 ppm (dt, 4H), 7.389 ppm (d, 2H), 7.137 ppm (t, 2H), 7.016 ppm (s, 1H), 6.873 ppm (d, 2H), 6.648 ppm (s, 1H), 5.070 ppm (s, 2H), 4.518 ppm (s, 2H), 4.421 ppm (s, 2H), 4.032 ppm (septet, 1H), 1.369 ppm (d, 6H).

NMR (400 MHz, CD30D) 19F : -64.925 ppm (s, 3F), -77. 645 ppm (s, 6F), -115. 076 ppm (s, 1F) Example 54 4- (bromomethyl) benzaldehyde Example 54a: To a solution of 4- (bromomethyl) benzonitrile (10 g, 50 mmol) in dichloromethane (30 mL) at 0 °C was added DibalH (56 mL, 55 mmol) dropwise. After addition the reaction mixture was heated to 45 °C for 4 hrs and then cooled to room temperature. The reaction was quenched with the addition of 10% H2SO4 and stirred overnight. The layers were separated and the aqueous layer extracted with dichloromethane (2 x 50 mL). The organic extracts were washed with brine and dried (Na2SO4). The solvent was removed in vacuo to give the product as a solid (7.12 g, 72%). 1H NMR (400 MHz, CDC13) : 9. 99 (s, 1 H), 7. 85 (d, 2 H), 7. 54 (d, 2 H), 4. 49 (s, 2 H).

4- (azidomethyl) benzaldehyde Example 54b: To a solution of Example 54a (1.5 g, 0. 75 mmol) in DMF at room temperature was added sodium azide (0. 58 g, 8.9 mmol). The reaction was stirred at room temperature for 2 hrs and then diluted with water and ether. The layers were separated and the organic layer washed with water and brine. The organic extracts were dried (Na2SO4) and the solvent removed to give the desired product as an oil (1.02 g, 85%). 1H NMR (400 MHz, CDC13) : 8 10.0 (s, 1 H), 7.89 (d, 2 H), 7. 48 (d, 2 H), 4. 44 (s, 2 H).

4- (azidomethyl) benzaldehyde oxime Example 54c: To a solution of Example 54b (1.37 g, 8.55 mmol) in dichloromethane/ethanol was added H2NOH*HC1 (O. 64 g, 9.21 mmol) and pyridine (0. 83 mL, 10.21 mmol). After 3 hrs, the reaction was diluted with water and dicholoromethane. The layers were separated and the organic layer washed with brine and dried (Na2SO4). The solvent was removed in vacuo to give an oil, which after chromatography (silica, 10%-30% ethyl acetate: hexanes) gave the desired product (1.2 g, 80 H NMR (400 MHz, CDC13) : 8 8.13 (s, 1 H), 7.73 (bs, 1 H), 7.59 (d, 2 H), 7.33 (d, 2 H), 4.35 (s, 2 H).

4- (azidomethyl)-N-hydroxybenzenecarboximidoyl chloride Example 54d: To a solution of Example 54c (1.20 g, 6.80 mmol) in DMF (15 mL) at room temperature was added N- chlorosuccinimide. The reaction was heated to 40 °C for 3 hrs and then allowed to cool to room temperature. The reaction mixture was diluted with water and ether. The layers were separated and the organic layer washed with brine and dried (Na2SO4). The solvent was removed in vacuo to give an oil, which after chromatography (10-20% ethyl acetate: hexane) gave the desired product as an oil (0. 98 g, ' 68%). 1H NMR (400 MHz, CDC13) : 8 8.51 (bs, 1 H), 7.85 (d, 2 H), 7.34 (d, 2 H), 4.37 (s, 2 H).

3- [4- (azidomethyl) phenyl]-5, 5-bis (trifluoromethyl) -4, 5- dihydro-1, 2, 4-oxadiazole Example 54e: To a solution of Example 54d (0. 15 g, 0. 71 mmol) in ether at 0 °C was bubbled in 1,1, 1,3, 3,3- hexafluoropropan-2-imine (Synquest) for 3 min.

Triethylamine was added and the reaction was stirred at room temperature for 2 hrs. The reaction mixture was diluted with water and ether. The layers were separated and the organic layer washed with brine and dried (Na2SO4). The solvent was removed to give an oil, which after chromatography (silica, 5%-30% ethyl acetate: hexane) gave the desired product as an oil (0.11 g, 47%). 1H NMR (400 MHz, CDC13) : # 7.71 (d, 2 H), 7.43 (d, 2 H), 5. 43 (bs, 1 H), 4. 42 (s, 2 H) 19F NMR (371 MHz, CDC13) : 0. 6 (s, 6 F); MS-ESI (M+H) = 381.

4- [5, 5-bis (trifluoromethyl)-4, 5-dihydro-1, 2,4-oxadiazol-3- yl] benzylamine Example 54f: To a solution of Example 54e (0. 83 g, 2.41 mmol) in THF: H20 (9mL: lmL) was added triphenylphosphine (0. 77 g, 2.88). The reaction was stirred at 40 °C for 2 hrs and then the solvent removed in vacuo to give an oil, which after chromatography (silica, 30%-50% MeOH/DCM) gave the desired product as a white solid (0. 62 g, 830). 1H NMR (400 MHz, CD30D) : 5 7.70 (d, 2 H), 7.46 (d, 2 H), 3.86 (s, 2 H).

Example 54 : 1H NMR (400 MHz, CD30D) : # 7.67 (d, 2 H), 7.36 (d, 2 H), 6.96 (s, 1 H), 6.84 (d, 2 H), 4.50 (s, 1 H), 4.41 (s, 1 H), 4.10-4. 07 (m, 1 H), 1.24 (d, 6 H) ; 19F NMR (371 MHz, CD30D) : 5-64. 84 (s, 3 F), -82. 36 (s, 6 F) ; MS-ESI (M+H) = 666.

Example 55 Example 55 : m/z (M+H) +624 Analysis: C31H32F3N7O4 + 2. 1 TFA + 0. 25 H20 calcd: C, 48.73 ; H, 4.02 ; N, 11.30 ; found: C, 48.81 ; H, 4.16 ; N, 11.04.

HRMS calcd: 624.2541 ; Found: 624.2523 1H NMR (400MHz, DMSO): 1.22 (6H, d), 4.07 (1H, m), 4.19 (2H, m), 4. 31 (2H, s), 5. 01 (2H, s), 6.67-6. 77 (5H, m), 6.91 (1H, s) 7.29-7. 44 (5H, m), 7.51 (1H, d), 8.56 (1H, t).

Example 56 Example 56a : A solution of di (tert-butyl)-4- [amino (imino) methyl] benzylimidodicarbonate (5. 0 g, 12.7 mmol) in 225 ml of tetrahydrofuran and 25 ml of water at 0°C was added sodium carbonate (6.75 g, 63.7 mmol) and 1M isopropyl chloroformate in tetrahydrofuran (28 ml, 28 mmol).

The reaction mixture was stirred for 4 hours while warming to room temperature. The mixture was treated with water and extracted with ethyl acetate. The organic layer was dried over sodium sulfate, filtered and evaporated in vacuo to give an oil. The oil was purified by silica gel chromatography with 10-50% EA/Hex to give-2. 0 g of a white solid. m/z (M+H) +436 Example 56b: The product from Example 56a (-2. 0 g, 12.7 mmol) at 0°C was dissolved in 4M hydrogen chloride in dioxane (20 ml, 80 mmol) and stirred for 2 hours while warming to room temperature. The mixture was diluted with 150m1 of ethyl ether and the resulting precipitate was collected by vacuum filtration to give 1.37 g (40% yield over two steps) of a white solid. m/z (M+H) +236 Example 56 : m/z (M+H)'588 Analysis: C28H32F3N7 04 + 1.7 TFA + 0.45 H20 calcd: C, 47.77 ; H, 4.42 ; N, 12.42 ; found: C, 47.78 ; H, 4.49 ; N, 12.31.

HRMS calcd: 588.2541 ; Found: 588.2558 'H NMR (400MHz, DMSO): 1.20 (6H, d), 1.33 (2H, d), 4.09 (1H, m), 4.37 (4H, s), 5.06 (1H, s), 6.71 (1H, s), 6.77 (1H, s), 6.80 (1H, s), 6.90 (1H, s), 7.38 (2H, d), 7.72 (2H, d), 8.75 (1H, t).

Example 57: N-{4-[(Z)-amino (hydroxyimino) methyl]-3-hydroxybenzyl}-2- [6- [3-amino-5-(trifluoromethyl) phenyl]-3-(isopropylamino)-2- oxopyrazin-1 (2H)-yl] acetamide Example 57: To a lOOmL RBF was added free amidine (0. 50g, 0. 98mmol) in ethanol (75mL). To the reaction was added hydroxyl amine hydrochloride (0. 173g, 2. 5mmol) and triethyl amine (0. 50mL). The reaction was heated to reflux for 16 hours. By L. C. and M. S. the starting material was consumed and desired product was observed. The reaction was concentrated in vacu and water was added (200mL). The solid was filtered and dried in a dessicator in the presence of P205 to afford Ex-16 (0.410g) as a tan solid in 76% yield.

M. S. 533. 51 (MH+534. 7) Elemental-Isolated as a hydrate with 1.25 waters Calculated: C 54.03 H 4.91 N 18.38 Found: C 51.84 H 5.01 N 17.55 Example 58 2- [6- [3-amino-5- (trifluoromethyl) phenyl-3- (isopropylamino)- 2-oxopyrazin-l (2H)-yl]-N- {4- [5-methyl-5- (trifluoromethyl)- 4, 5-dihydro-1, 2, 4-oxadiazol-3-yl] benzyl} acetamide di (tert-butyl) 4- [5-methyl-5- (trifluoromethyl) -4, 5-dihydro- 1, 2, 4-oxadiazol-3-yl] benzylimidodicarbonate Example 58a : 1H NMR (400 MHz, CDC13) : 5 7.62 (d, 2 H), 7.33 (d, 2 H), 4. 83 (s, 1 H), 4. 78 (s, 2 H), 1. 77 (s, 3 H), 1. 44 (s, 18 H) ; MS-ESI (M+H) = 460.

4- [5-methyl-5- (trifluoromethyl) -4, 5-dihydro-1, 2,4-oxadiazol- 3-yl] benzylamine Example 58b: To a round bottom flask containing Example 58a (1.44 g, 3.00 mmol) was added 4N HC1 in dioxane (25 mL).

After 2 hrs the reaction was filtered and the solid collected and washed with ether. The solid was dried under high vacuum and used without further purification (0. 88g, 960). 1H NMR (400 MHz, d6-DMSO) : 8 8.49 (bs, 3 H), 7.70 (d, 2 H), 7.57 (d, 2 H), 4.75 (bs, 1 H), 4.04 (q, 2 H), 1.64 (s, 3 H) ; MS-ESI (M+H) = 260.

Example 58 : 1H NMR (400 MHz, CD30D) : S 7.62 (d, 2 H), 7.32 (d, 2 H), 6.96 (s, 1 H), 6.84 (d, 2 H), 6.71 (s, 1 H), 4.50 (s, 2 H), 4.39 (s, 2 H), 4.11 (m, 1 H), 1.68 (s, 3 H), 1.26 (d, 6 H) ; 19F NMR (371 MHz, CD30D) : 8-64. 8 (s, 3 F), -88. 3 (s, 3 F) ; MS-ESI (M+H) = 612.

Example 59 Example 59: m/z (M+H) +645 Analysis: C30H35F3N8O5 + 1.3 TFA + 1.8 H20 calcd: C, 47.29 ; H, 4.71 ; N, 13.13 ; found: C, 47.23 ; H, 4.58 ; N, 13.30.

HRMS calcd: 645.2755 ; Found: 645.2764 1H NMR (400MHz, DMSO): 1.22 (6H, d), 3.43 (2H, br s), 3.53 (6H, br s), 4.08 (1H, m), 4.28 (2H, m), 4.34 (2H, s), 4.62 (2H, s), 6.74 (1H, s), 6.77 (1H, s), 6.79 (1H, s), 6.92 (1H, s), 7.20 (2H, d), 7.56 (2H, d), 8.61 (1H, t).

Example 60 Example 60: m/z (M+H) +654 Analysis: C32H34F3N70s + 1.9 TFA + 0.95 H20 calcd: C, 48.45 ; H, 4.29 ; N, 11.05 ; found: C, 48.47 ; H, 4.30 ; N, 10.97.

HRMS calcd: 654.2646 ; Found: 654.2665 1H NMR (400MHz, DMSO): 1.22 (6H, d), 3.74 (3H, s), 4.07 (1H, m), 4.20 (2H, m), 4.32 (2H, s), 4.93 (2H, s), 6.67-6. 76 (5H, m), 6.91 (1H, s), 6.93 (2H, d), 7.36 (2H, d), 7.48 (1H, d), 8.57 (1H, t).

Example 61 Example 61: m/z (M+H) +682 Analysis: C33H34F3N, 06 + 1.3 TFA + 0. 45 H20 calcd: C, 51.03 ; H, 4.35 ; N, 11.70 ; found: C, 51.08 ; H, 4.44 ; N, 11.60.

HRMS calcd: 682.2595 ; Found: 682.2609 1H NMR (400MHz, DMSO): 1.21 (6H, d), 3.84 (3H, s), 4.07 (1H, m), 4.19 (2H, d), 4.31 (2H, s), 5.11 (2H, s), 6.67 (1H, s), 6.72 (1H, s), 6.93 (2H, d), 6.75 (2H, m), 6.84 (1H, br s), 6. 91(1H, s), 7.54 (1H, m), 7.56 (1H, d), 7.95 (1H, d), 8.54 (1H, t).- Example 62 NHZ NHZ / "N N : 301"N N 02 ° N awNH C NOH H II N N O2 NHZ' NN NH H I NHZ/OH NH2 1 Example 62 NH2 O/ N-y 0 0-1 N u H \ N I/ /NOH NH2 N- {4- [ (Z)-amino (hydroxyimino) methyl]benzyl}-2-[6-[3-amino-5- (isobutylsulfonyl) phenyl]-3- (isopropylamino)-2-oxopyrazin- 1 (2H)-yl] acetamide Example 62: To a 25mL RBF was added free amidine 1 (0. 66g, 0. 887mmol) in ethanol (lOmL) and DIEA (0. 5mL). To the solution was added hydroxyl amine (0. 69g, l. Ommol). The reaction stirred at reflux for 24 hours. By LCMS the starting material was only 50% consumed. The solution was diluted with lOOmL of 1N HC1 and purified by reverse phase chromatography to afford Ex-18 (0.40g) in 79% yield.

M. S. 569.3 (MH+570.5) NMR (400MHZ, CDCL3): 1H 1.08 ppm (6H, d), 4.01 ppm (1H, s), 4.2 ppm (lH, q), 4.25 ppm (2H, d), 4.36 ppm (2H, s), 6.75 ppm (2H, s), 6.79 ppm (2H, d), 6.9 ppm (1H, d), 6.98 ppm (1H, s), 7.58 (1H, d) 8.48 (1H, t).

Elemental-Isolated as a hydrate with 2 TFAs and 1 water as the hydrate Calculated: C 56.93 H 6.19 N 17.21 Found: C 45.68 H 4.78 N 12.15 Example 63 2, 5-difluoroterephthalonitrile Example 63a: A solution of 1, 4-dibromo-2,5-difluorobenzene (24.3 g, 89.6 mmol) and CuCN (24.06 g, 269 mmol) in DMF (150 mL) was heated to 150°C while stirring for 16 hours. The reaction mixture was allowed to cool to room temperature and poured into a 15% NH40H solution (150 mL), diluted with CX2C12 (150 mL), filtered and transferred to a separatory funnel. The organic layer was separated and the aqueous solution was extracted with CH2C12. The combined organic solutions were dried over Na2SO4, filtered and concentrated.

The crude product was purified by sublimation in a Kugelrhor apparatus to give Example 63a as a yellow solid.

H-NMR, 300 MHz, CDC13 # 7. 54 (t, J = 6. 00 Hz, 2H) 19F-NMR, 282 MHz, CDCl3 # -108.99 (t, J = 6.00 Hz, 2F) tert-butyl 4-cyano-2,5-difluorobenzylcarbamate Example 63b: To Example 63a, 2,5-difluoroterephthalonitrile (5.08 g, 30.9 mmol) in EtOH (150 mL) was added di-tert butylpyrocarbonate (7.11 mL, 30.9 mmol) and PtO2. XH20 (250 mg). The solution was purged with Argon and hydrogenated in a Fischer-Porter bottle at 60 psi while stirring for 16 hours. The reaction mixture was filtered through celite and concentrated to give Example 63b.

1H-NMR, 300 MHz, CDC13 8 7.20-7. 30 (m, 2 H), 5.00 (bs, 1 H), 4.38 (d, J = 6.2 Hz, 2 H), 1.45 (s, 9 H).

19F-NMR, 282 MHz, CDC13 8-122. 13 (mult), -111. 614 (mult). tert-butyl (3-amino-5-fluoro-1, 2-benzisoxazol-6 - yl) methylcarbamate Example 63c: A solution of acetohydroxamic acid (2.20 g, 29.2 mmol) and Potassium tert-butoxide (3.44 g, 29.2 mmol) in DMF (75 mL) stirred at ambient temperature for 0. 5 hour followed by addition of Example 63b, tert-butyl 4-cyano-2,5- difluorobenzylcarbamate in DMF (20 mL). The reaction stirred for 16 hours at ambient temperature. The reaction mixture was diluted with brine (20 mL) and ethyl acetate (20 mL). The organic layer was separated and the aqueous layer extracted with ethyl acetate (3 X 20 mL). The organic layers were combined dried over magnesium sulfate, filtered and concentrated to give Example 63c.

LCMS (RP, 15-90% gradient acetonitrile in 0. 1% ammonium acetate over 6 min): retention time = 3. 38; (M+H) + 282.

H-NMR, 300 MHz, CDC13 5 7.40 (d, J = 5. 44 Hz, 1 H), 7.16 (d, J = 8.66 Hz, 1 H) 4.62 (d, J = 5.84, 2 H), 1.46 (s, 9 H).

19F-NMR, 282 MHz, CDC13 6-126. 191 (apparent dd, J = 5. 64, J = 7.34 F) 6- (aminomethyl)-5-fluoro-1, 2-benzisoxazol-3-amine dihydrochloride Example 63d: A solution of Example 63c, tert-butyl (3- amino-5-fluoro-1, 2-benzisoxazol-6-yl) methylcarbamate and 4 N HC1 in dioxane were stirred at room temperature for 16 hours. The reaction was concentrated to give Ex-13d as a white solid.

LCMS (RP, 15-90% gradient acetonitrile in 0. 1% ammonium acetate over 14 min): retention time = 0.83 ; (M+H) + = 182.

1H-NMR, 300 MHz, DMSO-d6 8 8.65 (bs, 3 H), 7.74 (d, J = 9.46 Hz, 1 H), 7.17 (d, J = 6. 64 Hz, 1 H), 5.35 (bs, 3 H), 4.09- 4.17 (m, 2 H), 19F-NMR, 282 MHz, DMSO-d6 # -125. 181 (apparent dd, J = 8.71 Hz, J = 5.81 1F).

Example 63: The carboxylic acid, [3-amino-5- (trifluoromethyl) phenyl]-3- (isopropylamino)-2-oxopyrazin- 1 (2H)-yl] acetic acid, (727 mg, 1.64 mmol) the benzyl amine, 6-(aminomethyl)-5-fluoro-1, 2-benzisoxazol-3-amine dihydrochloride, Example 63d (959 mg, 3.77 mmol) and HOBt-H20 (332 mg, 2.46 mmol) were placed in a flask. DMF (4 mL) and CH2C12 (60 mL) were added. To this gently stirred solution was added polymeric DCC resin (7.94 g, loading 1.4 mmol/g, 11 mmol) and triethylamine was added to pH = 9. The resulting mixture was stirred over night followed by gentle heating to 35°C for 1 hour. Polymeric tris-amine resin (2.46 g, loading 2.46 mmol/g, 1 mmol) was added and stirred for 1 hour. The resins were filtered and washed with CH2C12 (200 mL). The filtrate was concentrated and the residue was purified by prep HPLC (RP, 5-90% gradient, acetonitrile in 0. 1% TFA) to give Example 63.

LCMS (RP, 15-90% gradient acetonitrile in 0. 1% ammonium acetate over 14 min): retention time = 6.61 ; (M+H) + = 534.

Example 64 Example 64a: m/z (M+H) +626 Example 64: To the product from Example 64a (0.62 g, 0.99 mmol) in 9.3 ml of tetrahydrofuran and 2.5 ml of 2-propanol was added 2.5 N sodium hydroxide (1.2 ml, 3 mmol) and the mixture was stirred overnight. The reaction was quenched with 0. 23 ml of trifluoroacetic acid and concentrated to a small volume. The mixture was treated with methyl sulfoxide until dissolution was complete. The solution was purified by reverse phase chromatography with 5-50% CH3CN/H20 to give 115 mg (14% yield) of a white solid. m/z (M+H) +612 Analysis: C32H33N7Oó + 1.85 TFA + 1.15 H20 calcd: C, 50.85 ; H, 4.44 ; N, 11.63 ; found: C, 50.82 ; H, 4.40 ; N, 11.65.

HRMS calcd: 612.2565 ; Found: 612.2578 1H NMR (400MHz, DMSO): 1.21 (6H, d), 4.09 (1H, m), 4. 35- 4.39 (4H, m), 5.34 (2H, s), 6.69 (1H, s), 6.75 (1H, s), 7.09 (1H, s), 7.26 (1H, s), 7.37-7. 50 (7H, m), 7.75 (2H, d), 8.68 (1H, t).

Example 65 Example 65: The carboxylic acid, [3- (isopropylamino)-6- [3- ({[(1S)-1-methylpropyl]amino}carbonyl)-5-aminophenyl]-2- oxopyrazin-l (2H)-yl] acetic acid (tan solid, M + H = 475) (260 mg, 0. 55 mmol), the benzyl amine, 6- (aminomethyl)-5- fluor-1, 2-benzisoxazol-3-amine dihydrochloride, (139 mg, 0.55 mmol) and HOBt-H20 (93 mg, 0.61 mmol), were dissolved in DMF (8 mL) and CH2C12 (50 mL). To this gently stirred mixture was added polymeric DCC resin (2.60 g, loading 1.4 mmol/g, 3.64 mmol) and triethylamine was added to pH = 9.

The reaction was stirred for 72h at room temperature (for convenience). The resin was filtered and the filtrate was concentrated. Purification by prep HPLC (RP, acetonitrile gradient in 0. 1% TFA) afforded 220 mg of Example 65: (71%) as a colorless amorphous solid.

LCMS (RP, 15-90% acetonitrile in TFA over 14 min) : retention time = 3.51 min; (M+H) + = 565.

Example 66 benzyl (lE)-amino {4- [ ( [6- (3-amino-5-{[ (4- fluorobenzyl) amino] carbonyl} phenyl)-3-(isopropylamino)-2- oxopyrazin-1 (2H) - yl]acetyl]amino)methyl]phenyl}methylidenecarbamate tert-butyl [6-(3-{[(4-fluorombenzyl)amino]carbonyl}-5- nitrophenyl)-3- (isopropylamino)-2-oxopyrazin-1 (2H) - yl] acetate Example 66a : 1H NMR (400 MHz, CD3OD) : 5 8.74 (t, 1 H), 8.39 (t, 1 H), 8.22 (t, 1 H), 7.39-7. 36 (m, 2 H), 7.06-7. 02 (m, 2 H), 6. 82 (s, 1 H), 4. 55 (s, 2 H), 4. 43 (s, 2 H), 4.18-4. 10 (m, 1 H), 1. 37 (s, 9 H), 1. 26 (d, 6 H).

[6-(3-amino-5-{[(4-fluorobenzyl) amino] carbonyl} phenyl) -3- (isopropylamino)-2-oxopyrazin-1 (2H)-yl] acetic acid Example 66b: To a solution of Example 66a (0. 82 g, 1.50 mmol) in dichloromethane (20 mL) was added TFA (20 mL) and the reaction mixture stirred overnight at room temperature.

The solvent was removed in vacuo to give acid as a brown solid (0. 80 g). The crude acid was used without purification in the next step. To the nitro acid in a Parr bottle was added methanol (50 mL) and 10% Pd/C (0.10 g) at room temperature. The reaction was shaken on Parr hydrogenator at 40 psi for 2 hrs and then filtered through Celite. The solvent was removed in vacuo to give Example 66b as an off-white solid (0. 65 g, 95%). 1H NMR (400 MHz, CD30D) : 8 7.74 (t, 1 H), 7. 68 (t, 2 H), 7. 38-7. 35 (m, 3 H), 7.04 (t, 2 H), 6.70 (s, 1 H), 4.54 (s, 2 H), 4.52 (s, 2 H), 4.06-4. 02 (m, 1 H), 1.40 (d, 6 H) ; MS-ESI (M+H) = 454.

Example 66 : 1H NMR (400 MHz, CD30D) : 8 7.66 (d, 2 H), 7.49- 7.21 (m, 5 H), 7.03-6. 97 (m, 2 H), 6.84 (t, 1 H), 6.65 (s, 1 H), 5.40 (s, 2 H), 4.63 (s, 2 H), 4.46 (s, 2 H), 4.40 (s, 2 H), 4.05-4. 00 (m, 1 H), 1.34 (d, 6 H) ; 19F NMR (371 MHz, CD30D) : 5-77. 58 (s, 7.5 F), -118.18 (sep, 1 F).; MS-ESI (M+H) = 719 ; Analysis: C39H39FN8O5 + 2.5 TFA + 0. 95 H20 calcd: C, 51.76 ; H, 4.28 ; N, 10.97 ; found: C, 51.75 ; H, 4.28 ; N, 10.98.

Example 67 NHZ H-y N C))" /I \ \ J S. I/ N 02 N \ \ S \ N II : I N 02 H I/NFi H NHZ NHZ I H Example 67 NHs /l H oxim . L) t) °ON-Y NHZ zozo N- (4- (Z) - amino [(benzyloxy) imino]methyl}benzyl) -2- [6-[3- amino-5- (isobutylsulfonyl) phenyl]-3- (isopropylamino)-2- oxopyrazin-l (2H)-yl] acetamide Example 67: To a lOOmL RBF was added free amidine 1 (0. 51g, 0. 66mmol) in ethanol (30mL) and DIEA (0.15mL). To the solution was added benzoxy amine (O. 119g, 0. 75mmol). The reaction stirred at reflux for 7 days. By LCMS the starting material was only 50% consumed. The solution was diluted with lOOmL of 1N HC1 and purified by reverse phase chromatography to afford Ex-17 (0.178g) in 47% yield.

M. S. 659.3 (MH+660. 7) Elemental-Isolated as a hydrate with 1.75 TFAs Calculated: C 61.89 H 6.26 N 14.86 Found: C 52. 60 H 5.08 N 11.55 EXAMPLE 68 tert butyl [6- [3-amino-5- (hydroxy) phenyl]-3-isopropylamino)- 2-oxopyrazin-1 (2H)-yl] acetate EXAMPLE 68a: 1 g (2.02 mmol) of t-butyl [6- [3-nitro-5- (O- benzyl) phenyl]-3-isopropylamino)-2-oxopyrazin-1 (2H) - yl] acetate was dissolved in 30 mL MeOH and reduced in the presence of 1 g HCOONH4 and 0. 2 g Pd black with stirring for 12 hours. The catalyst was filtered off and the solvent was evaporated to dryness. EXAMPLE 68b: The residue of EXAMPLE 68a was treated with 35 mL of TFA for 90 minutes stirring and then TFA was evaporated to give a white solid. EXAMPLE 68c: The white solid of EXAMPLE 68b was dissolved in 20 mL dioxane and 10 mL H20and the pH was adjusted to >8 by the addition of 2.5 N NaOH. 0. 65 g (3 mmol) (Boc) 20 was added to the mixture and it was stirred for 12 hours.

Dioxane was evaporated and the residue was diluted with 50 mL of 10% KHSO4. It was extracted with 2x100 mL EtOAc. The organic phase was washed with brine, dried over MgS04 and the solvent was evaporated. Yield: 0.78 g (1.5 mmol; 75%) solid. MH+=419.1 EXAMPLE 68d: 1.45 g (3 mmol) di-Boc-4-amino-Z-benzamidine was deprotected in 25 mL CH2C12/TFA (4: 1) for 30 minutes stirring and the solvent was thoroughly evaporated to dryness. This solid and 0. 78 g (1.5 mmol) of EXAMPLE 68c were dissolved in 25 mL DMF. They were coupled in the presence of 0. 7 g (2.2 mmol) TBTU and 0. 875 mL (5 mmol) DIPEA for 1 hour. DMF was evaporated and the product was precipitated by addition of 200 mL water and filtered. The crude product was dissolved in the mixture of AcN and H20 and purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the title product at 48% AcN, 0. 614 g (60%) as a white solid.

MH+ =684. 2 EXAMPLE 68: 0.61 g (0.9 mmol) of EXAMPLE 68d was deprotected in 25 mL CH2C12/TFA (4: 1) for 30 minutes stirring. The solvent was evaporated and the residue was dissolved in AcN/H20 and lyophilized to yield 0. 54 g (0. 66 mmol ; 74%) white solid.

Mu+ =584. 2 1HNMR : 400 MHz, CD30D : 7.78-7. 70 (d, 2H), 7.52-7. 44 (d, 2H), 7.43-7. 32 (m, 5H), 6.64 (s, 1H), 6.40-6. 34 (m, 3H), 5.40 (s, 2H), 4.59 (s, 2H), 4.48 (s, 2H), 4.10-4. 00 (m, 1H) and 1.36-1. 28 (m, 6H).

Elemental analysis: C3lH33N, Os + 3xTFA + 1. 5xH20 Found C: 46.77 H: 4.17 N: 10. 21 Calc. C: 46.65 H: 4.13 N: 10.29 EXAMPLE 69 EXAMPLE 69a: 1 g (3 mmol) N, N-di-Boc-4-aminobenzonitrile was deprotected in 25 mL CH2C12/TFA (4: 1) for 30 minutes and the solvent was evaporated thoroughly to dryness. 0. 28 g (0. 67 mmol) of the product of EXAMPLE 68c was coupled with the 4-aminobenzo-nitrile in 30 mL DMF in the presence of 0.32 g (1 mmol) TBTU and 1.75 mL (10 mmol) DIPEA with stirring for 12 hours. DMF was evaporated and the product was precipitated by addition of 200 mL water, filtered and dried. Yield: 0.31 g (0.58 mmol; 87%) solid.

MH+=533. 3 EXAMPLE 69b: 0.31 g (0.58 mmol) of EXAMPLE 69a was dissolved in 25 mL EtOH and it was refluxed in the presence of 0. 347 g (5 mmol) hydroxylamine. HCl and 0. 875 mL (5 mmol) DIPEA for 4hours. The solvent was evaporated and the product was purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes). Yield: 0.237 g (0. 42 mmol; 72%) as a white solid. Mu"=566. 2 EXAMPLE 69: 0.237 g (0. 42 mmol) of EXAMPLE 69b was deprotected in 25 mL CH2C12/TFA (4: 1) with stirring for 30 minutes. The solvent was evaporated and the residue was dissolved in AcN/H20 and lyophilized to yield 0.277 g (0.4 mmol; 95%) white solid.

MH+ =466. 2 1HNMR : 400 MHz, CD30D : 7.68-7. 62 (d, 2H), 7.50-7. 44 (d, 2H), 6.61 (s, 1H), 6.54 (s, 1H), 6.48-6. 40 (s, 2H), 4.58 (s, 2H), 4.46 (s, 2H), 4.10-3. 98 (m, 1H) and 1.40-1. 32 (m, 6H).

Elemental analysis : C23H27N, °4 + 2. lxTFA + 1. 4xH2O Found C: 45. 04 H: 4.50 N: 13.48 Calc. C: 45.12 H: 4. 46 N: 13.64 Example 70 benzyl (1E) -amino{4- [ ( { [6- [3-amino-5- (trifluoromethyl) phenyl]-3- (isopropylamino)-2-oxopyrazin- 1 (2H)-yl] acetyl} amino) methyl]-2- hydroxyphenyl} methylidenecarbamate Example 70: To a solution of free amidine (0. 098 g, 0. 16 mmol) in DMF at room temperature was added benzyl 4- nitrophenyl carbonate (0. 06 g, 0. 18 mmol) and NMM (0. 10 mL, 0. 70 mmol). After stirring overnight at room temperature the crude reaction was purified by RP-HPLC to give the desired product (38.9 mg). 1H NMR (400 MHz, CD30D) : 6 8.10 (d, 2 H), 7.51-7. 37 (m, 5 H), 6.90-6. 86 (m, 4 H), 6.65 (s, 1 H), 5.36 (s, 2 H), 4.51 (s, 2 H), 4.35-4. 34 (m, 2 H), 4.05- 4.01 (m, 1 H), 1. 37 (d, 6 H) ; 19F NMR (371 MHz, CD30D) : 8- 64.92 (s, 3 F), -77. 65 (s, 7.65 F) ; MS-ESI (M+H) = 652 ; Analysis: C32H32F3N70s + 2.55 TFA + 0.05 H20 calcd: C, 47.23 ; H, 3.7 ; N, 10.31 ; found: C, 47.22 ; H, 3.67 ; N, 10.31.

Example 71 3-amino-5- [l- [2- ( {4- [ (Z) -amino ({[ (2,6- difluorobenzyl) oxy] carbonyl} imino) methyl] benzyl} amino)-2- <BR> <BR> <BR> oxoethyl]-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2- yl] benzoic acid 2,6-difluorobenzyl 4-nitrophenyl carbonate Example 71a: To a solution of (2,6-difluorophenyl) methanol (2. 0 g, 13.87 mmol) in dichloromethane at 0 °C was added NMM (1.73 mL, 16.65 mmol) and 4-nitrophenyl chloridocarbonate (2.8 g, 13.87 mmol). The reaction mixture was stirred at room temperature for 2 hrs and then diluted with ethyl acetate and water. The layers were separated and the organic layer was washed with brine and dried (Na2SO4). The solvent was removed in vacuo to give a white solid, which after chromatography (silica 10% ethyl acetate: hexane then 5% ethyl acetate: dichloromethane) to give the desired product as a white solid (3.61 g, 89%). 1H NMR (400 MHz, CDC13) : 5 8.26-8. 24 (m, 2 H), 7.39-7. 36 (m, 3 H), 6.95 (t, 2 H), 5.40 (s, 2 H).

Example 71 : 1H NMR (400 MHz, CD30D) : 8 7.72 (d, 2 H), 7.53- 7.28 (m, 5 H), 7.04 (t, 2 H), 6.89 (t, 1 H), 6.63 (S, 1 H), 5.53 (s, 2 H), 4.58 (s, 2 H), 4.45 (s, 2 H), 4.07-4. 00 (m, 1 H), 1.35 (d, 6 H) ; 19F NMR (371 MHz, CD30D) : 5-77. 53 (s, 6.6 F), -116.57 (t, 2 F) ; MS-ESI (M+H) = 648 ; Analysis: C32H31F2N7O6 + 2.4 TFA + 0. 65 H2O calcd : C, 47. 37 ; H, 3.74 ; N, 10.5 ; O, 19.63 ; found: C, 47.37 ; H, 3.86 ; N, 10.44 ; 0, 19.64.

Example 72 2-chlorobenzyl 4-nitrophenyl carbonate Example 72a: To a solution of 2-chlorobenzyl alcohol (3.50 g, 24.6 mmol) and N-methylmorpholine in 200 ml of dichlormethane at 0°C was added 4-nitrophenyl chloroformate (5.00 g, 24.8 mmol). The solution was allowed to come to room temperature and stirred overnight. The solution was concentrated to a small volume and then purified through a silica gel plug with dichloromethane to give 6.95 g (92% yield).

1H NMR (400MHz, CDC13) : 5. 43 (2H, s), 7.32-7. 52 (4H, m), 7.40 (2H, d), 8.28 (2H, d).

Example 72: To free amidine (303 mg, 0. 59 mmol) and the product from Example 72a (199 mg, 0. 65 mmol) in 5 ml of N, N- dimethylformamide was added N-methylmorpholine (0.33 ml, 2.95 mmol). The solution was stirred for 40 hours. The solution was treated with trifluoroacetic acid (0. 23 ml, 2.99 mmol) and purified by reverse phase chromatography with 10-50% CH3CN/H20 to give a white solid. The solid was purified a second time by reverse phase chromatography with 15-50% CH3CN/H20 to give 50 mg (10% yield) of a white solid m/z (M+H) +646 Analysis: C32H33ClN70, + 2. 00 TFA + 0. 85 H20 calcd: C, 48.61 ; H, 4.05 ; N, 11.02 ; found: C, 48.64 ; H, 4.06 ; N, 10.96.

HRMS calcd: 646.2175 ; Found: 646.2183 1H NMR (400MHz, DMSO): 1.22 (6H, d), 4.09 (1H, m), 4.36 (2H, d), 4.39 (2H, s), 5.41 (2H, s), 6.70 (1H, s), 6.76 (1H, t), 7. 10 (1H, t), 7.26 (1H, t), 7.37 (2H, d), 7.40-7. 47 (2H, m), 7.55 (1H, m), 7.63 (1H, m), 7.76 (2H, d), 8.69 (1H, t).

Example 73 cyclobutyl 4-nitrophenyl carbonate Example 73a: To a solution of cyclobutyl alcohol (2.02 g, 28.1 mmol) and N-methylmorpholine in 200 ml of dichlormethane at 0°C was added 4-nitrophenyl chloroformate (5.71 g, 28.4 mmol). The solution was allowed to come to room temperature and stirred overnight. The mixture was filtered through a. silica gel plug with dichloromethane to give 6.7 g (quantitative yield) of a light yellow oil.

1H NMR (400MHz, CDC13) : 1. 67 (1H, m), 1. 87 (1H, m), 2. 25 (2H, m), 2.43 (2H, m), 5.05 (1H, m), 7.37 (2H, d), 8.26 (2H, d).

Example 73: To free amidine (303 mg, 0. 59 mmol) and the product from Example 73a (199 mg, 0. 65 mmol) in 5 ml of N, N- dimethylformamide was added N-methylmorpholine (0. 33 ml, 2.95 mmol). The solution was stirred for 40 hours. The solution was treated with trifluoroacetic acid (0. 23 ml, 2.99 mmol) and purified by reverse phase chromatography with 10-50% CH3CN/H20 to give a white solid. The solid was purified a second time by reverse phase chromatography with 15-50% CH3CN/H20 to give 50 mg (10% yield) of a white solid m/z (M+H) +577 Analysis: C29H33N7O6 + 2.25 TFA + 0.10 H20 calcd: C, 48. 25 ; H, 4.28 ; N, 11.76 ; found: C, 48.09 ; H, 4.49 ; N, 11.89.

HRMS calcd: 576.2565 ; Found: 576.2607 Example 74 Example 74a: To the free acid (4.02 g, 9.31 mmol) 4- (dimethylamino) pyridine (0.227 g, 1.86 mmol) and ethanol (2.63 ml, 46.55 mmol) in 50 ml of dichloromethane was added 1- [3- (dimethylamino) propyl]-3-ethylcarbodiimide hydrochloride (2.67 g, 13.97 mmol) and the solution was stirred for 1.5 hours. The solution was concentrated in vacuo and the residue was purified by silica gel chromatography in two batches with 30-50% EA/Hex and 0-10% CH30H/CH2C12. The desired fractions were combined and concentrated. The residue was re-chromatographed with 20, 25% EA/Hex to give 1.95 g (% yield) of an orange solid. m/z (M+H) +461 Example 74b: The product from Example 74a (1.95 g, 4.24 mmol) was dissolved in 4M hydrogen chloride in dioxane (18 ml, 72 mmol) and heated at 60°C for 6 hours. The mixture was concentrated in vacuo and dried under high vacuum to give 2.05 g (qantitative yield) of a light yellow solid. m/z (M+H) +405 Example 74c: To the product from Example 74b (2.05 g, mmol) in 50 ml of ethanol was added 0. 50 g of 10% palladium on carbon and 0. 7 ml of hydrogen chloride (conc.). The mixture was shaken on the Parr apparatus under 45 Psi of hydrogen for 2.5 hours. The mixture was filtered and concentrated in vacuo to give 2.00 g (quantitative yield) of a light yellow solid. m/z (M+H) +375 Example 74: To the product from Example 74c (1.2 g, 2.74 mmol) and benzyl [4- (aminomethyl) phenyl] (imino) methylcarbamate hydrochloride (1.05 g, 3.29 mmol) in 10 ml of N,N-dimethylformamide was added N,N-diisopropylethylamine (2.38 ml, 13.7 mmol) and then benzotriazol-1-yl tetramethyluronium tetrafluoroborate (1.06 g, 3.29 mmol). The solution was stirred for 2 hours.

The solution was treated with trifluoroacetic acid (1.27 ml, 16.4 mmol) and purified by reverse phase chromatography with 5-65% CH3CN/H20 to give 1. 10 g (45% yield) of a white solid. m/z (M+H) +640 Analysis: C34H37N7O6 + 2.30 TFA + 0. 70 H20 calcd: C, 50.69 ; H, 4.49 ; N, 10.72 ; found: C, 50.70 ; H, 4.52 ; N, 10.70.

HRMS calcd: 640.2878 ; Found: 640.2860 1H NMR (400MHz, DMSO): 1.22 (6H, d), 1.27 (3H, t), 4.09 (1H, m), 4.26 (2H, q), 4.36-4. 39 (4H, m), 5.35 (2H, s), 6.70 (1H, s), 6.78 (1H, t), 7.12 (1H, t), 7.27 (1H, t), 7.37-7. 50 (7H, m), 7.74 (2H, d), 8.70 (1H, t).

Example 75 3-amino-5- [1- (2- [4- ( (Z)-amino { [ (2,2, 2- trichloroethoxy) carbonyl] imino} methyl) benzyl] amino}-2- oxoethyl)-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2- yl] benzoic acid Example 75: To a solution of free amidine (0. 30 g, 0. 63 mmol) in THF: H20 (3mL: lmL) was added Na2CO3 (0. 30 g, 2.83 mmol) and succinimidyl 2,2, 2-trichloroethyl carbonate (0.20 g, 0. 69 mmol) at room temperature. The reaction mixture was stirred for 3 hrs and then decanted and acidified with TFA.

The crude reaction mixture was purified by RP-HPLC (CH3CN : H20) to give the desired product (110 mg). 1H NMR (400 MHz, CD30D) : 8 7. 78 (d, 2 H), 7. 45-7. 43 (m, 3 H), 7. 31-7. 29 (m, 1 H), 6.89 (t, 1 H), 6.65 (s, 1 H), 5.08 (s, 2 H), 4.59 (s, 2 H), 4.47 (d, 1 H), 4.06-4. 02 (m, 1 H), 1.36 (d, 6 H) ; MS- ESI (M+H) = 654 ; Analysis: C27H28Cl3N7O6 + 2.4 TFA + 1.35 H20 calcd: C, 40.16 ; H, 3.5 ; N, 10.31 ; O, 20.44 ; found: C, 40.21 ; H, 3.47 ; H, 3.47 ; O, 20.48.

Example 76 benzyl (lE)-amino {4- [ ( { [6- {3-amino-5- [ (benzylamino) carbonyl] phenyl}-3- (isopropylamino) -2- oxopyrazin-1 (2H)-yl] acetyl} amino) methyl]-2- hydroxyphenyl} methylidenecarbamate 3- [1- (2-{[(3-amino-1, 2-benzisoxazol-6-yl) methyl] amino}-2- oxoethyl)-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2-yl]- N-benzyl-5-nitrobenzamide Example 76a: To a solution of free acid (1.55 g, 3.1 0 mmol) in DMF (20 mL) at 0 °C was added triethylamine (1. 9 mL, 13.64 mmol), TBTU (1. 49 g, 4.65 mmol), and aminomethyl- 1, 2-benzisoaxazol-3-amine (1.09 g, 4.65 mmol). The reaction mixture was stirred at room temperature for 2 hrs and then poured into water. The precipitate was filtered and washed with diethyl ether. The solid was dried on high vacuum to give the desired product (1.86 g, 98%). MS-ESI (M+H) = 611.

Example 76b: To a solution of Example 76a (1.86 g, 3.0 mmol) in THF: MeOH (2mL: 20 mL) was added 10% Pd/C (0.4 g) and ammonium formate (0.64 g, 10.1 mmol) at room temperature.

The reaction mixture was heated to reflux for 2 hrs and then cooled to room temperature. The reaction was filtered through Celite and the solvent removed to give a crude oil, which was purified by RP-HPLC (CH ; CN : H20) to give Example 76b (0.85 g). 1H NMR (400 MHz, CD30D) : b 7.53 (d, 2 H), 7.31-7. 21 (m, 5 H), 7.16 (t, 1 H), 6.92 (t, 1 H), 6.87 (s, 1 H), 6.76-6. 73 (m, 1 H), 6.64 (s, 1 H), 4.59 (s, 2 H), 4.53 (s, 2 H), 4.29 (s, 2 H), 4.05-4. 02 (m, 1 H), 1.37 (d, 6 H) ; MS-ESI (M+H) = 583.

Example 76c: To a solution of Example 76b (0. 30 g, 0. 50 mmol) in DMF (3 mL) was added NMM (0.25 mL, 2.2 mmol) and benzyl 4-nitrophenyl carbonate (0. 15 g, 0. 55 mmol). The reaction mixture was stirred overnight and then acidified. with TFA. The crude mixture was purified by RP-HPLC (CH3CN : H20) to give after lypholization the desired product (92 mg). 1H NMR (400 MHz, CD30D) : 5 7.47-7. 21 (m, 11 H), 7.08 (t, 1 H), 6.86-6. 84 (m, 2 H), 6.74-6. 72 (m, 2 H), 6.65 (s, 1 H), 5.36 (s, 2 H), 4.59 (s, 2 H), 4.51 (s, 2 H), 4.29 (d, 2 H), 4.05-4. 02 (m, 1 H), 1.35 (d, 6 H) ; MS-ESI (M+H) = 717; Analysis: C3gH40N806 + 2.15 TFA +1.4 H20 calcd: C, 52.68 ; H, 4.58 ; N, 11.35 ; O, 18.96 ; found: C, 52.68 ; H, 4.58 ; N, 11.44 ; O, 19.01.

Example 77 benzyl. (1E)-amino{4-[({[6-(3-amino-5-{[(4- fluorobenzyl) amino] carbonyl}phenyl)-3-(isopropylamino)-2- oxopyrazin-1 (2H)-yl] acetyl} amino) methyl]-2- hydroxyphenyl} methylidenecarbamate [6- (3- { [ (4-fluorobenzyl) amino] carbonyl}-5-nitrophenyl)-3- (isopropylamino)-2-oxopyrazin-1 (2H)-yl] acetic acid Example 77a: To a solution of t-butyl ester (1.7 g, 3.0 mmol) in dichloromethane (20 mL) was added TFA (20 mL) and the reaction mixture stirred overnight at room temperature.

The solvent was removed in vacuo to give the acid as a brown solid (1.63 g). MS-ESI (M+H) = 484.

3-[1-(2-{[(3-amino-1, 2-benzisoxazol-6-yl) methyl] amino}-2- <BR> oxoethyl)-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2-yl]-<BR> <BR> N- (4-fluorobenzyl)-5-nitrobenzamide Example 77b: To a solution of Example 77a (1.63 g, 3.10 mmol) in DMF (20 mL) at 0 °C was added TBTU (1.49 g, 4.65 mmol), TEA (1.9 mL, 13.64 mmol) and aminomethyl-1, 2- benzisoaxazol-3-amine (1.09 g, 4.65 mmol). The reaction was stirred at room temperature for 2 hrs and then poured into water. The precipitate was filtered and washed with diethyl ether to give the desired product as a yellow solid (1.94 g, 100%). MS-ESI (M+H) = 629.

3-amino-5- [1- [2- ( {4-Eamino (imino) methyl-3- hydroxybenzyl} amino)-2-oxoethyl]-5- (isopropylamino)-6-oxo- 1, 6-dihydropyrazin-2-yl]-N- (4-fluorobenzyl) benzamide Example 77c: To a solution of Example 77b (1.94 g, 3.10 mmol) in THF: EtOH (lOmL : 40 mL) was added 10% Pd/C and concentrated HC1 (3 drops) at room temperature. The reaction mixture was shaken on a Parr hydrogenator at 40 psi for 24 hrs. The reaction was filtered through Celite and the filtrate concentrated to give a brown oil, which after purification by RP-HPLC (CH3CN : H20) and lypholization gave the desired product (787 mg). 1H NMR (400 MHz, CD30D) : 6 7.53 (d, 1 H), 7. 34-7. 30 (m, 2 H), 7.26 (t, 1 H), 7.11 (t, 1 H), 7.0 (t, 2 H), 6.88-6. 86 (m, 2 H), 6.76-6. 73 (m, 1 H), 6.64 (s, 1 H), 4. 59 (s, 2 H), 4. 49 (s, 2 H), 4. 30 (s, 2 H), 4.06-4. 02 (m, 1 H), 1.36 (d, 6 H) ; 19F NMR (371 MHz, CD30D) : 8-77. 05 (s, 8.7),-118. 16 (sep, 1 F) ; MS-ESI (M+H) = 601 ; Analysis: C31H33FN8O3 + 2. 4 TFA + 1.15 H20 calcd: C, 48.91 ; H, 4.32 ; N, 12.74 ; O, 16.29 ; found: C, 48.99 ; H, 4.29 ; N, 12.68 ; O, 16.3.

Example 77d: To a solution of Example 77c (0.30 g, 0.50 mmol) in DMF (3 mL) at room temperature was added NMM (0.25 mL, 2.2 mmol) and benzyl 4-nitrophenyl carbonate (0. 15 g, 0. 55 mmol). The reaction mixture was stirred overnight and then acidified with TFA. The crude mixture was purified by RP-HPLC (CH3CN : H20) to give after lypholization the desired product (142 mg). 1H NMR (400 MHz, CD ; OD) : # 8.10 (d, 1 H), 7.46-7. 24 (m, 8 H), 7.09 (t, 1 H), 6.98 (t, 2 H), 6.88-6. 86 (m, 2 H), 6.75-6. 73 (m, 1 H), 6.64 (s, 1 H), 5.36 (s, 2 H), 4.59 (s, 2 H), 4.47 (s, 2 H), 4.30 (s, 2 H), 4.06-4. 02 (m, 1 H), 1.35 (d, 6 H) ; 19F NMR (371 MHz, CD30D) : 6-77. 47 (s, 6.6 F), -118.10 (sep, 1 F) ; MS-ESI (M+H) = 735 ; Analysis: C39H39FN8O6 + 2.1 TFA + 0.95 H20 calcd: C, 52.34 ; H, 4.37 ; N, 11.3 ; found : C, 52.31 ; H, 4.34 ; N, 11.34.

Example 78 3-amino-5- [1- [2- ( {4- [ (Z)-amino ( { [ (4- fluorobenzyl) oxy] carbonyl) imino) methyl] benzyl} amino)-2- oxoethyl]-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2- yl] benzoic acid Example 78: To a solution of free amidine (0. 30 g, 0. 63 mmol) in DMF (3 mL) at room temperature was added NMM (0. 31 mL, 2.8 mmol) and 4-fluorobenzyl 4-nitrophenyl carbonate (0. 20 g, 0. 69 mmol). The reaction mixture was stirred overnight and then acidified with TFA. The crude reaction mixture was purified by RP-HPLC (CH3CN : H20) to give after lypholization the desired product (151 mg). 1H NMR (300 MHz, CD30D) : # 7.74 (d, 2 H), 7.55-7. 42 (m, 6 H), 7.31 (s, 1 H), 7.14 (t, 2 H), 6.91 (s, 1 H), 6.64 (s, 1 H), 5.38 (s, 2 H), 4.59 (s, 2 H), 4.46 (d, 1 H), 4.06-4. 02 (m, 1 H), 1.38 (d, 6 H) ; 19F NMR (371 MHz, CD30D)-7 9. 0 9 (s, 6.8 F), - 116. 66 (sep, 1 F) ; MS-ESI (M+H) = 630 ; Analysis: C32H32FN706 + 2.4 TFA + 1.2 H20 calcd: C, 47.78 ; H, 4.01 ; N, 10.6 ; found: C, 47.78 ; H, 3.96 ; N, 10.67.

Example 79 4-methoxyphenyl {4- [ ( { [6- (3-amino-5-hydroxyphenyl) -3- (isopropylamino)-2-oxopyrazin-1 (2H) - yl] acetyl} amino) methyl] phenyl} (imino) methylcarbamate di (tert-butyl) 4- ( (E)-amino { (4- methoxyphenoxy) carbonyl] imino} methyl) benzylimidodicarbonate Example 79a: To a 250mL RBF was added the di-Boc- amidine (5g, 9. 5mmol) in dioxane (25mL) and 1 N sodium hydroxide (30mL). The reaction stirred for 15 minutes. To the reaction was added the 4-methyoxyphenyl chloroformate (4.2mL, 28. 5mmol) as two separate portions 1 hour apart.

After the second addition a precipitate formed and the reaction stirred for an additional hour. The reaction was dumped into 200mL of water. The aqueous layer was extracted with methylene chloride (2X50mL). The organics were combined, dried over MgS04 then concentrated to afford Ex-3a (4. 5g) in 99% yield.

MS 499.56 (MH+ 500.5) 4-methoxyphenyl (lE)-amino [4- (aminomethyl) phenyl] methylidenecarbamate Example 79b: To a 250 mL RBF was added Example 79a (3.5g, 7mmol) in 4 N HCl/dioxane. The reaction stirred for 1 hour and L. C. indicated that the reaction was finished.

The solvent and excess HC1 was removed in vacuo to afford a white solid that will be used as is.

MS 299. 32 (MH+300. 1) 4-methoxyphenyl {4- [({[6-{3-[(tert-butoxycarbonyl)amino]-5- hydroxyphenyl}-3-(isopropylamino)-2-oxopyrazin-1 (2H) - yl] acetyl} amino) methyl] phenyl} (imino) methylcarbamate Example 79c: To a 250mL RBF was added Example 79b (2.2g, 7. 2mmol) in DMF (25mL. To the solution was added DIEA (5mL), the acid (1. 5g, 3. 6mmol) and TBTU (2.3g, 7.2mmol). The reaction stirred overnight at room temperature then was dumped into water (250mL). The organicas were extracted with ethyl acetate which was dried over MgS04 then concentrated in vacuo to afford Example 79c (1.75g) in 70% yield. By LC and Mass Spec. the product is pure enough to carry on to the next step.

MS 699.25 (MH+700.2) Example 79d: To a lOOmL RBF was added Example 79c (1.75g, 2, 5mmol) in methylene chloride (50mL) and TFA (lOmL). The reaction stirred for 20 minutes then was checked by L. C. and M. S. and the starting material was observed to be consumed. The reaction was concentrated in vacuo and the resulting oil was triturated with diethyl ether. The resulting tan solid was dried on a high vacuum overnight to afford Example 79d (1.4g) in 92% yield.

MS 599.64 (MH+600.5) NMR (400MHz, CDC13) : 1H 1.48 ppm (6H, d), 3.80 ppm (3H, s), 4. 05 ppm (lH, q), 4.51 ppm (2H, s), 4.61 ppm (2H, s), 6.42 ppm (1H, s), 6.48 ppm (1H, s), 6.53 ppm (1H, t), 6.62 ppm (1H, s), 6.98 ppm (2H, d), 7.20 ppm (2H, d), 7.56 ppm (2H, d), 7.84 ppm (2H, d).

Example 80 3-amino-5- [l- [2- ( {4- [ (Z)-amino (hydroxyimino) methyl-3- <BR> <BR> hydroxybenzyl} amino)-2-oxoethyl]-5- (isopropylamino)-6-oxo- 1, 6-dihydropyrazin-2-yl]-N- (sec-butyl) benzamide Example 80: To a lOOmL RBF was added free amidine (0. 92g, 1.68mmol) in ethanol (20mL). To the reaction was added hydroxyl amine hydrochloride (0. 2g, 29mmol) and triethyl amine (0. 99mL). The reaction was heated to 50 C and checked after 2 hours by L. C. No reaction was observed.

The reaction was heated to reflux for 16 hours. By L. C. and M. S. the starting material was consumed and desired product was observed. To the reaction was added water and acetonitrile to the volume of 150mL and the crude reaction was purified on reverse phase chromatography to afford Example 80 (0. 510g) in 54% yield.

M. S. 564.64 (MH+566.7) Elemental-Isolated as a salt with 2 TFAs Calculated: C 59.82 H 6.45 N 19.85 Found: C 45.70 H 4.68 N 12.90 Example 81 Example 81: To a stirred solution of free acid (1.0 g, 2.5 mmol), oxadiazol-amine (0. 84 g, 3. 0 mmol), and N- methylmorpholine (1.37 ml, 8. 0 mmol) in N, N- dimethylacetamide (12 ml) cooled in an ice bath was added TBTU (0. 88 g, 2.8 mmol). Stirring was continued at ambient temperature for 2 hour. The reaction was diluted with water and the resulting solid was collected by vacuum filtration, washed with water, and air-dried. The solid was crystallized from methanol/water to give 0. 88 g (60% yield) of an off-white solid. 1HNMR (300 MHz, DMSO-d6) 5 1.23 (d, J = 6.3 Hz, 6H), 3.82-3. 98 (s, 3H), 4.05-4. 20 (m, 1H), 4.39 (d, J = 4.8 Hz, 2H), 4.44 (s, 2H), 5.66 (s, 2H), 6.69 (s, 1H), 6.81 (s, 1H), 6. 86 (d, J = 8.1 Hz, 1H), 7.12 (s, 1H),.

7.29 (s, 1H), 7.41 (d, J = 7.8 Hz, 2H), 8.01 (d, J = 8.1 Hz, 2H), 8.61-8. 70 (m, 1H). 19FNMR (282 MHz, DMSO-d6) 8-65. 08 (s). HRMS (ES) calcd for C27H27N705F3 (M+H): 586.2020.

Found: 586.2026. Anal. Calcd for C27H26N7O5F3 + 0. 2 CH30H : C, 55.19 ; H, 4.56 ; N, 16.56. Found: C, 55.23 ; H, 4.46 ; N, 16.48.

Example 82 Example 82: To a stirred solution of Example 81 (0.63 g, 1.07 mmol) in methanol (20 ml) and THF (20 ml) cooled in an ice bath was added 2.5 N sodium hydroxide (1.42 ml, 3.54 mmol) and reaction stirred at ambient temperature for 22 h.

Additional 2.5 N sodium hydroxide (0. 473 ml, 1.18 mmol) added and stirring continued for 4 hours. Reaction was acidified with 6N hydrochloric acid and purification by reverse phase HPLC (5-50% acetonitrile/water) followed by lyophilization yielded 194 mg (25% yield) of an off-white solid. 1HNMR (300 MHz, DMSO-d6) 8 1.26 (d, J = 6.6 Hz, 6H), 4.07-4. 18 (m, 1H), 4. 36-4.47 (m, 4H), 6.74 (s, 1H), 6.80 (s, 1H), 7.14 (s, 1H), 7.31 (s, 1H), 7.44 (d, J = 8.4 Hz, 2H), 8.04 (d, J = 8.4 Hz, 2H), 8.63-8. 70 (m, 1H), 12.90 (br s, 1H). 19FNMR (282 MHz, DMSO-d6) 8-65. 05 (s). HRMS (ES) calcd for C26H25N7O5F3 (M+H): 572.1870. Found: 572.1861.

Anal. Calcd for C26H24N7OsF3 + 1.3 TFA + 0.7 H20 : C, 46.9 ; H, 3.67 ; N, 13.38. Found: C, 46.9 ; H, 3.64 ; N, 13.41.

Example 83 Example 83a: The nitro compound (2.25 g, 5.3 mmol) was shaken with 10% palladium on carbon (1.25 g) in methanol (50 ml) under 45 psi hydrogen for 1 hour. The reaction was filtered and concentrated in vacuo. The residue was treated as above with the addition of 6N hydrogen chloride (0.88 ml, 5.3 mmol) to give 1.65 g (79% yield) of Example 83a as a light tan solid. LCMS (ES+) m/z M+H 361.

Example 83b : 1HNMR (300 MHz, DMSO-d6) # 1.19 (d, J = 6. 3 Hz, 6H), 3.78 (s, 3H), 4.00-4. 14 (m, 1H), 4. 30-4.40 (m, 4H), 5.32 (s, 2H), 6.67 (s, 1H), 6.75 (s, 1H), 7.08 (s, 1H), 7.25 (s, 1H), 7.32-7. 50 (mm, 7H), 7.72 (d, J = 8.4 Hz, 2H), 8.66 (t, J = 5.7 Hz, 1H) 10.41 (br s, 1H). HRMS (ES) calcd for C33H3sN706 (M+H): 626.2722. Found: 626.2723. Anal.

Calcd for C33H35N706 + 2. 05 TFA + 0. 75 H20 : C, 51.04 ; H, 4.45 ; N, 11.23. Found: C, 51.09 ; H, 4.49 ; N, 11.16.

EXAMPLE 84 EXAMPLE 84a: 3.8 g (9. 1 mmol) of free alcohol was reacted with 4.08 g (40 mmol; 3.77 mL) acetic anhydride in 50 mL CH2Cl2 in the presence of 8.75 mL (50 mmol) DIPEA with stirring for 4 hours. The mixture was washed with 100 mL brine, dried over MgSO4 and the solvent was evaporated.

Yield: 3.3 g (7.2 mmol; 79%) oil. MH+=461. 3 EXAMPLE 84b: 1.2 g (2.5 mmol) di-Boc-4-amino-Z- benzamidine was deprotected in 25 mL CH2C12/TFA (4: 1) for 30 minutes stirring and the solvent was thoroughly evaporated to dryness. This solid and 0. 8 g (1.74 mmol) of EXAMPLE 84a were dissolved in 15 mL DMF. They were coupled in the presence of 0. 64 g (2 mmol) TBTU and 1.75 mL (10 mmol) DIPEA for 1 hour. DMF was evaporated and the product was precipitated by addition of 200 mL water and filtered. The crude product was dissolved in the mixture of AcN and H20 and purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the title product at 46% AcN, 0. 91 g (1.2 mmol ; 72%) as a white solid.

MH+ =726. 1 EXAMPLE 84c: 0.61 g (0. 9 mmol) of EXAMPLE 84b was deprotected in 25 mL CH2Cl2/TFA (4: 1) with stirring for 30 minutes. The solvent was evaporated and the residue was dissolved in AcN/H20 and lyophilized to yield 0. 81 g (0. 95 mmol; 79%) white solid.

MH+ =62. 2 1HNMR : 400 MHz, CD30D : 7.78-7. 70 (d, 2H), 7.52-7. 44 (m, 4H), 7.43-7. 32 (m, 3H), 6.66-6. 60 (m, 3H), 6.50 (s, 1H), 5.40 (s, 2H), 4.62 (s, 2H), 4.46 (s, 2H), 4.10-3. 96 (m, 1H), 2.24 (s, 3H) and 1.40-1. 30 (m, 6H).

Elemental analysis : C33H35N7O6 + 2. 5xTFA + 2. lxH20 Found C: 48. 11 H: 4.42 N: 10.09 Calc. C: 48.12 H: 4.43 N: 10.34 Example 85 3-amino-5- {2- [ (4- { (Z)- amino [ (phenoxycarbonyl) imino] methyl} benzyl) amino]-2- <BR> <BR> oxOethyl}-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2- yl] benzoic acid EXAMPLE 85: To a solution of free amidine (0. 30 g, 0.62 mmol) in DMF (3 mL) was added NMM (0. 29 mL, 2.76 mmol) and diphenyl carbonate (0. 14 g, 0.69 mmol).

After stirring overnight the reaction mixture was acidified with TFA and purified by RP-HPLC (CH3CN : H20) to give desired product after lypholization (85 mg). 1H NMR (400 MHz, CD30D) : 5 7.82 (d, 2 H), 7.48-7. 32 (m, 8 H), 6.92 (t, 1 H), 6.64 (s, 1 H), 4.60 (s, 2 H), 4.48 (s, 2 H), 4.06-4. 02 (m, 1 H), 1.37 (d, 6 H) ; MS-ESI (M+H) = 598 ; Analysis: C3lH3lN706 + 3.0 TFA + 1.15 H20 calcd: C, 45.27 ; H, 3.8 ; N, 10.2 ; 0, 21.9 ; found: C, 45.35 ; H, 4.34 ; N, 11.99 ; O, 21.49.

Example 86 pyridin-3-ylmethyl {4- [ ({[6-(3-amino-5-hydroxyphenyl)-3- (isopropylamino)-2-oxopyrazin-1 (2H) - yl] acetyl} amino) methyl] phenyl} (imino) methylcarbamate 4-nitrophenyl pyridin-3-ylmethyl carbonate EXAMPLE 86a: To a 250 mL RBF was added the 1 pyridin- 3-ylmethanol (lOg, 91.3 mmol) in pyridine (75mL). The solution was cooled to 0 °C and the p-nitrophenyl chloroformate was added in amall portions over ½ hour. The reaction stirred at 0 °C for 1 hour then allowed to warm to room temperature overnight. To the reaction was added methylene chloride (lOOmL) and he mixture was washed with water (3X100mL). The organics were then washed with brine (2X100mL) and dried over MgS04. The organics were concentrated in vacuo to afford a glassy brown solid. The. solid was dissolved in 400mL of hot ethanol and in the freezer overnight. The resulting solid was filtered off and dried in a dessicator to afford (9.5g) EX-la in 38% yield.

MS 274.23 (MH+275) NMR (400MHz, CDC13) : 1H 5.3 ppm (2H, s), 7.39 ppm (3H, m), 7.8 ppm (lH, d), 8.28 ppm (2H, d), 8.62 ppm (lH, s), 8.72 ppm (lH, s). 13C 6.280, 121. 699, 123.615, 125.323, 129.865, 136.387, 149.998, 150.61, 152.358, 155.306 ppm. tert-butyl 3-[1-[2- ( {4- amino (imino)methyl]benzyl} amino) -2- oxoethyl]-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2-yl]- 5-hydroxyphenylcarbamate EXAMPLE 86b :' To a 250 mL RBF was added 4-amino- benzamidine (1.3g, 4. 56mmol) in DMF (20mL), free acid and DIEA (2mL). To the reaction was added TBTU (1.6g, 5. Ommol) and the reaction stirred overnight. The reaction was dumped into water and extracted with ethyl acetate (2X50mL). The organics were then washed with brine, dried over MgS04 then concentrated in vacuo. The resulting solid was triturated with diethyl ether to afford a white solid (2.55g) in 82 % yield. The solid was then subjected to catalytic hydrogenation in methanol and acetic acid overnight. The palladium was filtered off and the reaction was concentrated in vacuo to afford the deprotected amidine EXAMPLE 86b.

MS 549 (MH+550) pyridin-3-ylmethyl {4- [ ({E6-{3- [ (tert-butoxycarbonyl) amino]- 5-hydroxyphenyl}-3-(isopropylamino)-2-oxopyrazin-1 (2H) - yl] acetyl} amino) methyl] phenyl} (imino) methylcarbamate EXAMPLE 86c: To a lOOmL RBF was added the EXAMPLE 86b (0. 5g, 0.77mmol) and EXAMPLE 86a (0. 264g, 0.96mmol) in DMF (25mL) and methylene chloride (lOmL). To the reaction was added 1 N sodium hydroxide (5mL) then the reaction stirred overnight. The reaction was poured into water (50mL) and methylene chloride (50mL). The organics were collected and washed with brine (2X50mL). The organics were dried over MgS04 and concentrated in vacuo. The resulting solid was dissolved in water and acetonitrile (150mL) and purified with reverse phase chromatography to afford EXAMPLE 86c (0. 225g) in 43% yield.

MS 684.74 (MH+685.8) EXAMPLE 86d: To a 50 mL RBF was added Ex-lc (0. 220g, 0. 32mmol) in a 20% solution of TFA and methylene chloride.

The reaction stirred for 1 hour then was concentrated in vacuo. The resulting solid was dissolved in water (lOOmL) and purified by reverse phase chromatography to afford (0. 200g) in 99% yield as the TFA salt.

NMR (400MHz, CDC13) : 1H 1.36 ppm (6H, d), 3.30 ppm (2H, m), 4.03 ppm (lH, q), 4.9 ppm (2H, s), 4.59 ppm (2H, s), 5.53 ppm (2H, s), 6.54 ppm (2H, bs), 6.62 ppm (2H, b), 7.51 ppm (2H, d), 7.77 ppm (3H, d), 8.32 ppm (1H, bs), 8.7 ppm (1H, s), 8.84 ppm (2H, s). 13C 6.280, 121.699, 123.615, 125.323, 129.865, 136.387, 149.998, 150.61, 152.358, 155.306 ppm.

Example 87 3-amino-5- [l- {2- [ (4- { (Z)- amino [ (phenoxyzarbonyl) imino] methyl} benzyl) amino]-2- oxOethyl}-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2- yl] benzoic acid EXAMPLE 87: To a round bottom flask containing protected Bromo compound (1.72 g, 3.10 mmol) was added 3- amino-5-[(2-methoxyethoxy) carbonyl] phenylboronic acid (1.72 g, 6.2 mmol), Pd (PPh3) 4 (0. 71 g, 0.62 mmol) and Cs2CO3 (2.22 g, 6.82 mmol). The flask was flushed with nitrogen and the solids dissolved in CH3CN : H20 (15 mL : 1. 5 mL). The reaction. was heated to 80 °C for 9 hrs and then cooled to room temperature. The mixture was poured into water and ethyl acetate. The layers were separated and organic layer washed with brine and dried (Na2SO4). The solvent was removed to give a yellow oil, which after chromatography (silica, 60- 100% ethyl acetate: hexane) and RP-HPLC (CH3CN:H2O) gave the desired product (0.33 g, 16%). 1H NMR (400 MHz, CD30D) : # 7.73 (d, 2 H), 7.49-7. 32 (m, 9 H), 6.92 (t, 1 H), 6.64 (s, 1 H), 5.39 (s, 2 H), 4.58 (s, 2 H), 4.47 (d, 2 H), 4.38 (t, 2 H), 4.06-4. 02 (m, 1 H), 3.66 (t, 2 H), 3.29 (s, 3 H), 1.36 (d, 2 H) ; MS-ESI (M+H) = 670 ; Analysis: C35H39N7O7 + 2.3 TFA + 1.4 H20 calcd: C, 49.68 ; H, 4.64 ; N, 10.24 ; 0, 21.72 ; found: C, 49.68 ; H, 4.49 ; N, 10.31 ; 0, 21.77.

Example 88 Example 88: A stirred suspension of free amidine (0.25 g, 0.46 mmol), hydroxylamine hydrochloride (95 mg, 1.37 mmol), and triethylamine (0. 19 ml, 1.37 mmol) in absolute ethanol (4 ml) were heated at 90 °C for 4.5 hours (note extended heating resulted in poorer yield). Purification by reverse phase HPLC (5-45% acetonitrile/water) followed by. lyophilization yielded 130 mg (38% yield) of Example 88 as an off-white solid. 1HNMR (300 MHz, DMSO-d6) 8 0. 87 (t, J = 7.5 Hz, 3H), 1.12 (d, J = 6.6 Hz, 3H), 1.24 (d, J = 6.6 Hz, 6H), 1.43-1. 59 (m, 2H), 3.82-3. 96 (m, 1H), 4.04-4. 19 (m, 1H), 4.24 (d, J = 5.4 Hz, 2H), 4.40 (s, 2H), 6.70 (s, 1H), 6.72 (s, 1H), 6.76 (d, J = 9.0 Hz, 1H), 6.86 (s, 1H), 7.02 (s, 1H), 7.13 (s, 1H), 7.36 (d, J = 7.8 Hz, 2H), 8.04 (d, J = 8.7 Hz, 2H), 8.63 (t, J = 6.0 Hz, 1H) 10.90 (br s, 1H).

HRMS (ES) calcd for CHNgOg (M+H): 565.2881. Found: 565.2890. Anal. Calcd for CHNgOs + 2.3 TFA + 1.1 H20 : C, 46.24 ; H, 4.82 ; N, 13.23. Found: C, 46.25 ; H, 4.83 ; N, 13.23.

Example 89 Example 89: To the free amidine (400 mg, 0. 67 mmol) and cyclobutyl-chloroformate (174 mg, 0. 73 mmol) in 3 ml of N, N-dimethylformamide was added N-methylmorpholine (0. 29 ml, 2.67 mmol). The solution was stirred for 40 hours and then heated at 60°C for 2 hours. The solution was treated with trifluoroacetic acid (0. 26 ml, 3.34 mmol) and purified by reverse phase chromatography with 25-60% CH3CN/H20 to give 130 mg (22% yield) of a light yellow solid m/z (M+H) +699 Analysis: C36H39FN806 + 1. 65 TFA + 1.40 H20 calcd: C, 51.75 ; H, 4.80 ; N, 12.28 ; found: C, 51.71 ; H, 4.70 ; N, 12.44.

HRMS calcd: 699.3049 ; Found: 699.3057 1H NMR (400MHz, DMSO): 1.22 (6H, d), 1.63 (1H, m), 1.78 (1H, m), 2.10 (2H, m), 2.33 (2H, m), 4.08 (1H, m), 4.21 (2H, d), 4.40 (1H, s), 4.41 (2H, s), 4.98 (1H, quintet), 6.71 (3H, m), 6.79 (1H, s), 7.03 (1H, s), 7.11-7. 15 (3H, m), 7.33 (2H, m), 7.61 (1H, d), 8.61 (1H, t), 8.90 (1H, t), 10.05 (1H, br s).

Example 90 Example 90 : To a lOOmL RBF was added Ex- 4c (1. 16g, 2. lmmol), hydroxylamine hydrochloride (1. 06g, 15. 2mmol) in ethanol (25mL). To the reaction was added triethylamine (2mL). The reaction stirred at 80 °C for 4 hours. My M. S. and L. C. the reaction was complete so it was poured onto water (200mL) and the precipitate was filtered off. The solid was dissolved in ethyl acetate then dried over MgS04 and concentrated to afford Example 90 (0.4g) in 32% yield.

M. S. 581.62 (MH+582.3) Calculated: C 57.82 H 6.07 N 16.86 Found: C 55.76 H 6.44 N 16.45 Example 91 HPLC/LRMS: >97%, 665 (M+H) +; HRMS (ES+) calcd. for C36H4lN8Os 665.3194, found 665.3220.

Example 92 Example 92: To a lOOmL RBF was added example 90 (. 0200g, 0. 386mmol) in 20% TFA in methylene chloride (20mL)..

The reaction stirred for 1 hour then was concentrated in vacuo. The resulting glassy solid was triturated with diethyl ether then filtered. Upon filtration the solid observed to be deliquescent. The resulting oil was dissolved in water and lyophized to afford Example 92 (0.14g) in 87% yield.

M. S. 481.21 (MH+482.3) Elemental-Isolated as a salt with 2 TFAs Calculated: C 51.37 H 5.65 N 20.

Found: C 45.90 H 4.40 N 13.70 EXAMPLE 93 . EXAMPLE 93a: 2.19 g (6 mmol) di-Boc-4-amino-N-hydroxy- benzamidine was deprotected in 25 mL CH2Cl2/TFA (4: 1) for 30 minutes with stirring and the solvent was thoroughly evaporated to dryness. This solid and 1.5 g (3.2 mmol) of free acid were dissolved in 30 mL DMF. They were coupled in the presence of 1.6 g (5 mmol) TBTU and 3.5 mL (20 mmol) DIPEA for 12 hours. DMF was evaporated and the product was precipitated by addition of 200 mL water and filtered. The crude product was dissolved in the mixture of AcN and H20 and purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the product EXAMPLE 93a at 42% AcN, 0. 82 g (1.35 mmol ; 42%) as a white solid. Mu+ =608. 3 EXAMPLE 93: 0.82 g (1.35 mmol) of the boc-protected EXAMPLE 93a was deprotected in 25 mL CH2C12/TFA (4: 1) with stirring for 30 minutes. The solvent was evaporated and the residue was dissolved in AcN/H20 and purified on preparative HPLC using a gradient of acetonitrile (10-40% AcN in 30 minutes), yielding the title product at 23% AcN, 0.45 g (0.6 mmol ; 44%) as a white solid. MH+ =508. 2 HNMR : 400 MHz, CD ; OD : 7.68-7. 61 (d, 2H), 7.50-7. 40 (d, 2H), 6.64 (s, 1H), 6.60-6. 56 (d, 2H), 6.45 (s, 1H), 4.60 (s, 2H), 4.46 (s, 2H), 4.10-3. 98 (m, 1H), 2,14 (s, 3H) and 1.40- 1.32 (m, 6H).

Elemental analysis : C25H29N705 + 1. 8xTFA + 1. 8xH20 Found C: 46.02 H: 4.65 N: 12.59 Calc. C: 46.10 H: 5.01 N: 13.16 Example 94 ethyl 3-amino-5- [1- [2- ( {4- [ (Z) - amino (hydroxyimino) methyl] benzyl} amino)-2-oxoethyl]-3- chloro-5-(isopropylamino)-6-oxo-1, 6-dihydropyrazin-2- yl] benzoate ethyl 3-amino-5- [l- (2-tert-butoxy-2-oxoethyl) -3-chloro-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2-yl] benzoate Example 94a : To a round bottom flask under nitrogen was added THF (300 mL) and H20 (37 mL). The solvent mixture was degassed for 20 min after which pyrazinone-bromide (10. 0 g, 2.62 mmol), 3- (ethoxycarbonyl)-5-nitrophenylboronic acid (Combi-blocks, 7. 53 g, 3.15 mmol), Na2CO3 (11. 0 g, 10.4 mmol) and Pd (PPh3) 4 (3. OOg, 0. 26 mmol) were added. The reaction mixture was heated to reflux for 18 hrs after which 1.5 g of Pd (PPh3) 4 was added. After heating for 5 hr an additional 1.0 g of Pd (PPh3) 4 was added. The reaction was heated for 14 hrs and then allowed to cool to room temperature. The reaction mixture was poured into water and ethyl acetate. The layers were separated and the organic layer was washed with brine and dried (Na2SO4). The solvent was removed to give a brown foam, which after chromatography (silica, 10-20% ethyl acetate: hexane gave the desired product as a yellow solid (4.80 g, 37%). 1H NMR (400 MHz, CDC13) : 8 8. 93-8. 92 (m, 1 H), 8. 38 (t, 1 H), 8. 32 (t, 1 H), 6.27 (d, 1 H), 4.42 (q, 2 H), 4.33-4. 18 (m, 3 H), 1.41 (t, 3 H), 1.35 (s, 9 H), 1.28 (d, 6 H) ; MS-ESI (M+H) = 495.

[5-chloro-6- [3- (ethoxycarbonyl)-5-nitrophenyl]-3- (isopropylamino)-2-oxopyrazin-1 (2H)-yl] acetic acid Example 94b: To a solution of Example 94a (4.8 g, 9.7 mmol) in dichloromethane (100 mL) at 0 °C was added TFA (100 mL). After stirring for 4 hrs at room temperature the solvent was removed in vacuo to give a brown solid (5.35 g), which was used without further purification in the next step. MS-ESI (M+H) = 439.

[5-chloro-6- [3- (ethoxycarbonyl)-5-nitrophenyl]-3- (isopropylamino)-2-oxopyrazin-1 (2H)-yl] acetic acid Example 94c: To a solution of Example 94b (5.4 g, 12. 0 mmol) in methanol (50 mL) at room temperature was added 10% Pd/C and NH4CO2H (2.2 g, 36. 0 mmol). The reaction was heated to reflux for 2 hrs and then cooled to room temperature. The mixture was filtered through Celite and the solvent removed to give a yellow solid (6.3 g, 100%).

1H NMR (400 MHz, CD30D) : 6 8.48 (s, 1 H), 7.37 (t, 1 H), 7.22 (t, 1 H), 6.85 (t, 1 H), 4.31-4. 26 (m, 3 H), 4.16-4. 07 (m, 2 H), 3-. 29 (q, 2 H), 1.34 (t, 3 H), 1.24 (d, 6 H) ; MS- ESI (M+H) = 409. ethyl 3-amino-5- [3-chloro-l- {2- [ (4-cyanobenzyl) amino-2- oxOethyl}-5- (isopropylamino)-6-oxo-1, 6-dihydropyrazin-2- yl] benzoate Example 94d: To a solution of Example 94c (2.45 g, 6. 00 mmol) in DMF (30 mL) at 0 °C was added DIEA (4.6 mL, 26.4 mmol), TBTU (2.9 g, 9. 0 mmol), and 4-aminobenzonitrile (1. 5 g, 9. 0 mmol). After stirring overnight at room temperature the reaction mixture was poured into water and the precipitate filtered to give the desired product (3.10, 99%). MS-ESI (M+H) = 523.

Example 94e: To a solution of Example 94d (3.10 g, 6.0 mmol) in ethanol (40 mL) at room temperature was added K2CO3 (3.65 g, 26.4 mmol), DIEA (4.6 mL, 26.4 mmol) and H2NOH*HC1 (1.4 g, 19.8 mmol). The reaction was heated to reflux for 3 hrs and then allowed to cool to room temperature. The reaction was filtered and ethanol removed in vacuo to give an oil, which was purified by RP-HPLC (CH3CN : H20) to give the desired product (350 mg). 1H NMR (400 MHz, CD30D) : 7.62 (d, 2 H), 7.47 (t, 1 H), 7.41 (d, 2 H), 7.27 (t, 1 H), 6.90 (t, 1 H), 4.48-4. 37 (m, 4 H), 4.33-4. 27 (m, 2H), 4.18- 4.15 (m, 1 H), 1.34 (t, 3 H), 1.27-1. 25 (m, 6 H) ; Analysis: C26H3oClN705 + 1.9 TFA + 0. 7 H20 calcd: C, 45.57 ; H, 4.27 ; N, 12.48 ; O, 19.35 ; found: C, 45.52 ; H, 4.32 ; N, 12.56 ; 0, 19.35.

Example 95 ethyl 3-amino-5- [1- (2- { [4- ( (E)- amino {[(benzyloxy) carbonyl] imino} methyl) benzyl] amino}-2- oxoethyl)-3-chloro-5- (isopropylamino)-6-oxo-1, 6- dihydropyrazin-2-yl]benzoate Example 95: To a solution of Example 94b (2.45 g, 6.0 mmol) in DMF (30 mL) at 0 °C was added DIEA (4.6 mL, 26.4 mmol), TBTU (2.9 g, 9.0 mmol), and 4-amino-Z-benzamidine (2.54 g, 9. 0 mmol). After stirring overnight at room temperature the reaction mixture was poured into water and ethyl acetate. The layers were separated and the organic layer washed with sodium bicarbonate, brine and dried (Na2SO4). The solvent was removed to give an oil, which was purified by RP-HPLC (CH3CN : H20) to give the desired product (256 mg). 1H NMR (300 MHz, CD, OD) : 5 7.74 (d, 2 H), 7.51- 7.38 (m, 7 H), 7.26 (t, 1 H), 6.88 (t, 1 H), 5.41 (s, 2 H), 4.44 (s, 2 H), 4.42 (s, 2 H), 4.31 (q, 2 H), 4.20-4. 15 (m, 1 H), 1.34 (t, 3 H), 1.27 (d, 6 H) ; MS-ESI (M+H) = 674 ; Analysis: C34H36ClN706 + 1.4 TFA + 0.6 H20 calcd: C, 52.33 ; H, 4.6 ; N, 11.6 ; O, 17.8 ; found: C, 52.31 ; H, 4.63 ; N, 11.71 ; O, 17.79.

Example 96 Example 96: To the free amidine (299 mg, 0. 39 mmol) and cyclobutyl-chloroformate (102 mg, 0.43 mmol) in 3 ml of N, N- dimethylformamide was added N-methylmorpholine (0.17 ml, 1.56 mmol). The solution was heated at 60 °C for 20 hours.

The solution was then treated with more of the cyclobutyl- chloroformate and heated at 80°C for 2 hours. The solution was treated with trifluoroacetic acid (0.15 ml, 1.95 mmol) and purified by reverse phase chromatography with 20-50% CH3CN/H20 to give 128 mg (41% yield) of a light yellow solid m/z (M+H) +604 Analysis: C31H37N706 + 1.75 TFA + 1.00 H20 calcd: C, 50.46 ; H, 5.00 ; N, 11.94 ; found: C, 50.47 ; H, 4.97 ; N, 11.98.

HRMS calcd: 604.2878 ; Found: 604.2911 1H NMR (400MHz, DMSO): 1.22 (6H, d), 1.29 (3H, t), 1.67 (1H, m), 1.82 (1H, m), 2.18 (2H, m), 2.39 (2H, m), 4.01 (1H, m), 4.25 (2H, q), 4.38 (2H, d), 4.40 (1H, s), 5.08 (1H, quintet), 6.70 (1H, s), 6.79 (1H, s), 7.13 (1H, s), 7.28 (1H, s), 7.38 (2H, d), 7.. 75 (1H, d), 8. 68 (1H, t).

Example 97 Example 97: To the free amidine (100 mg, 148 mmol) in THF (5 mL) was added 10% sodium hydroxide (5 mL) at 0 °C.

Benzyl chloroacetate (0.025 g, 210 pilz 148 mmol) was then added and the mixture was allowed to stir overnight and warm to water bath temperature. LCMS at this time showed a large amount of starting material remaining. The reaction was again cooled to 0 °C and another equivalent (210 p1) of benzyl chloroacetate was added. After lh the reaction was complete. The mixture was transferred to a separatory funnel and the layers were separated. The aqueous layer was extracted with ethyl acetate (3 x 50 mL) and the combined organic layers were dried (MgSO4), filtered and concentrated. Purification by flash chromatography (Merck 230-400 mesh Si02, 2% MeOH in Chloroform) afforded Example 97 as a yellow solid. LCMS (RP, 15-90% acetonitrile in 0. 1% ammonium acetate over 8 min): retention time = 5.82 min; (M+H]+ = 737.

Example 98 benzyl (lE)-amino {4- [ ( [6-(3-amino-5-{[ (2- methoxyethyl) amino] phenyl)-3- (isopropylamino)-2- oxopyrazin-1 (2H) - yl] acetyl} amino) methyl] phenyl) methylidenecarbamate tert-butyl [3- (isopropylamino)-6- (3- { (2-methoxyethyl) <BR> <BR> <BR> <BR> amino] carbonyl}-5-nitrophenyl)-2-oxopyrazin-1 (2H)-yl] acetate Example 98a: To a solution of free acid (0. 6 g, 1.0 mmol) in DMF (15 mL) was added DIEA (0. 90 mL, 4.4 mmol), TBTU (0.9 g, 1.2 mmol), and 2-methoxyethylamine (0.12 mL, 1.2 mmol). After 2 hrs the reaction mixture was poured into water and ethyl acetate. The layers were separated and the organic layer washed with sodium bicarbonate and dried (Na2SO4). The solvent was removed in vacuo to give an oil, which after chromatography (silica, 50-75% ethyl acetate: hexane) gave the desired product (280 mg, 57%). MS- ESI (M+H) = 490. [3-(isopropylamino)-6-(3-{[(2-methoxyethyl) amino] carbonyl}- 5-nitrophenyl)-2-oxopyrazin-l (2H)-yl] acetic acid Example 98b: To a solution of Example 98a (0.28 g, 0. 57 mmol) in dichloromethane (10 mL) at room temperature was added TFA (10 mL). The reaction mixture was stirred for 2 hrs and then the solvent was removed in vacuo to give an oil (0. 28 g, 99%). MS-ESI (M+H) = 434.

[3- (isopropylamino)-6- (3- { [ (2-methoxyethyl) amino]carbonyl}- 5-nitrophenyl)-2-oxopyrazin-1 (2H)-yl] acetic acid Example 98c: To a solution of Example 98b (0.24 g, 0. 57 mmol) in methanol (10 mL) at room temperature was added 10% Pd/C (0. 15 g) and NH4C02H (0. 3 g, 4.7 mmol). The reaction was heated to reflux for 2 hrs and then cooled to room temperature. The mixture was filtered through Celite and solvent removed in vacuo to give an oil (0. 32g, 100%).

MS-ESI (M+H) = 404.

Example 98d: To a solution of Example 98c (0. 4 g, 0. 99 mmol) in DMF (5 mL) at 0 °C was added DIEA (1. 0 ml, 4.3 mmol), TBTU (0. 31 g, 0. 99 mmol), and 4-amino-Z-benzamidine (0. 28 g, 0. 99 mmol). After 1 hr the reaction mixture was purified by RP-HPLC (CHCNO) to give the desired product (94 mg). 1H NMR (400 MHz, CD30D) : 6 7. 72 (d, 2 H), 7. 49- 7.37 (m, 7 H), 7.19 (t, 1 H), 7.02 (t, 1 H), 6.83 (t, 1 H), 6.65 (s, 1 H), 5.40 (s, 2H), 4.63 (s, 2 H), 4.45 (d,. 2 H), 4.06-4. 02 (m, 1. H), 3.48 (s, 3 H), 3.30-3. 28 (m, 4 H), 1.35 (d, 6 H) ; MS-ESI (M+H) = 669 ; Analysis: C35H40N8O6 + 2.0 TFA + 1.5 H20 calcd: C, 50.77 ; H, 4.66 ; N, 11. 99; found: C, 50.84 ; H, 4.73 ; N, 11.88.

Example 99 HPLC/LRMS: >97%, 695 (M+H) +; HRMS (ES+) calcd. for C38H4, N805 695.3664, found 695.3688.

Example 100 HPLC/LRMS: >95%, 681 (M+H) +; HRMS (ES+) calcd. for C37H45N8O5 681.3507, found 681.3505.

Example 101 HPLC/LRMS : >96%, 667 (M+H) +; HRMS (ES+) calcd. for C36H43N805 667.3351, found 667.3331.

Example 102 HPLC/LRMS: >98%, 653 (M+H) +; HRMS (ES+) calcd. for C35H, lN805 653.3194, found 653.3216.

EXAMPLE 104 EXAMPLE 104a: 2.1 g (5 mmol) of Boc-protected phenol was reacted with 1.06 g (10 mmol ; 1.05 mL) isobutyryl chloride in 50 mL CH2C12 in the presence of 2.625 mL (15 mmol) DIPEA with stirring for 30 minutes. The solvent was evaporated and the residue was dissolved in AcN, diluted with H20 and purified on prep HPLC using a gradient of acetonitrile (20-55% AcN in 30 minutes), yielding the title product at 55% AcN, 1.17g (2.4 mmol ; 48%) as a white solid.

MH'=489. 2 EXAMPLE 104b: 1.44 g (3 mmol) di-Boc-4-amino-Z- benzamidine was deprotected in 25 mL CH2Cl2/TFA (4: 1) for 30 minutes stirring and the solvent was thoroughly evaporated to dryness. This solid and 1.17 g (2.4 mmol) of EXAMPLE 104-a were dissolved in 25 mL DMF. They were coupled in the presence of 0. 8 g (2.5 mmol) TBTU and 1.75 mL (10 mmol) DIPEA for 12 hour. DMF was evaporated and the product was precipitated by addition of 200 mL water and filtered. The crude product was dissolved in the mixture of AcN and H20 and purified on preparative HPLC using a gradient of acetonitrile (10-60% AcN in 30 minutes), yielding the product at 55% AcN, 0.38 g (0.5 mmol; 21%) as a white solid.

MH+ =754. 3 EXAMPLE 104c: 0. 38 g (0. 5 mmol) of EXAMPLE 104b was deprotected in 25 mL CH2Cl2/TFA (4: 1) with stirring for 30 minutes. The solvent was evaporated and the residue was dissolved in AcN/H20 and lyophilized to yield 0. 31 g (0. 35 mmol; 70%) white solid.

MH+ =654. 2 1HNMR : 400 MHz, CD30D : 7.78-7. 70 (d, 2H), 7.52-7. 45 (m, 4H), 7.44-7. 36 (m, 3H), 6. 64 (s, 1H), 6.60-6. 52 (d, 2H), 6.40 (s, 1H), 5.40 (s, 2H), 4.60 (s, 2H), 4.50-4. 44 (m, 2H), 4.10-3. 98 (m, 1H), 2.82-2. 72 (m, 1H), 1.40-1. 32 (m, 6H) and 1. 30-1. 22 (m, 6H).

Elemental analysis : C35H39N, 06 + 2. 5xTFA + 2. lxH20 Found C: 53.43 H: 5.48 N: 11.48 Calc. C: 53.32 H: 5.39 N: 11.58 EXAMPLE 105 EXAMPLE 105a : 2.1 g (5 mmol) of Boc-protected phenol was reacted with 1.2 g (10 mmol ; 1.23 mL) pivaloyl chloride in 40 mL CH2C12 in the presence of 3.5 mL (20 mmol) DIPEA with stirring for 30 minutes. The solvent was evaporated and the residue was dissolved in AcN, diluted with H20 and purified on prep HPLC using a gradient of acetonitrile (20- 55% AcN in 30 minutes), yielding the title product at 55% AcN, 1.17g (2.4 mmol ; 48%) as an oil. MIT =503. 2 EXAMPLE 105b : 1.44 g (3 mmol) di-Boc-4-amino-Z- benzamidine was deprotected in 25 mL CH2C12/TFA (4: 1) for 30 minutes stirring and the solvent was thoroughly evaporated to dryness. This solid and 1 g (2 mmol) of EXAMPLE 105a were dissolved in 25 mL DMF. They were coupled in the presence of 0. 8 g (2.5 mmol) TBTU and 1.75 mL (10 mmol) DIPEA for 12 hour. DMF was evaporated and the product was precipitated by addition of 200 mL water and filtered. The crude product was dissolved in the mixture of AcN and H20 and purified on preparative HPLC using a gradient of acetonitrile (10-60% AcN in 30 minutes), yielding the product at 58% AcN, 0. 628 g (0.82 mmol; 41%) as a white solid. MH'=768. 2 EXAMPLE 105c: 0.628 g (0. 82 mmol) of EXAMPLE 105b was deprotected in 25 mL CH2C12/TFA (4: 1) with stirring for 30 minutes. The solvent was evaporated and the residue was dissolved in AcN/H20 and lyophilized to yield 0. 67 g (0. 75 mmol ; 91%) white solid.

MH+ =668. 2 1HNMR : 400 MHz, CD30D : 7.80-7. 76 (d, 2H), 7.52-7. 42 (m, 4H), 7.42-7. 36 (m, 3H), 6.64 (s, 1H), 6.60-6. 52 (d, 2H), 6.38 (s, 1H), 5.40 (s, 2H), 4.62 (s, 2H), 4.50-4. 44 (m, 2H), 4.10-3. 98 (m, 1H) and 1.40-1. 26 (m, 15H).

Elemental analysis : Cs6H4lN706 + 1. 3xTFA + 2. lxH20 Found C: 54.32 H: 5.42 N: 11.37 Calc. C: 54.30 H: 5.49 N: 11.48 Example 106 2- (methylsulfonyl) ethyl {4- [ ( { [6- (3-amino-5-hydroxyphenyl) - 3- (isopropylamino)-2-oxopyrazin-1 (2H) - yl] acetyl} amino) methyl] phenyl} (imino) methylcarbamate 2- (methylsulfonyl) ethyl {4- [ ( { [6- {3- [ (tert-butoxycarbonyl) amino]-5-hydroxyphenyl}-3-(isopropylamino)-2-oxopyrazin- 1 (2H)-yl] acetyl} amino) methyl] phenyl} (imino) methylcarbamate Example 106a: To a 50mL RBF was added the free amidine (0. 514g, 0.935mmol) and 2- (methylsulfonyl) ethyl 4- nitrophenyl carbonate (0. 289g, 1.0 mmol) in NMM (2mL) and methylene chloride (15mL). The reaction stirred overnight.

The reaction was poured into water (S0mL) and methylene chloride (50mL). The organics were collected and washed with brine (2X50mL). The organics were dried over MgS04 and concentrated in vacuo to afford Example 106a (0. 295g) in 45% yield.

MS 699.78 (MH+700.3) NMR (400MHz, CDC13) : 1H 1.26 ppm (6H, d), 1.49 ppm (9H, s), 3.10 ppm (3H, s), 3. 51 ppm (2H, t), 4.1 ppm (1H, q), 4. 43 ppm (2H, s), 4. 58 ppm (3H, t), 4.6 ppm (2H, bs), 6. 42 ppm (1H, s), 6.72 ppm (1H, s), 6.85 ppm (1H, s), 7.09 ppm (1H, bs), 7.31 ppm (2H, d), 7.80 ppm (2H, d).

Example 106b: To a 50 mL RBF was added Example 106a (0. 295g, 0.422mmol) in a 20% solution of TFA and methylene chloride. The reaction stirred for 1 hour then was concentrated in vacuo. The resulting solid was dissolved in water (lOOmL) and purified by reverse phase chromatography to afford (0. 227g) in 89% yield as the TFA salt.

MS 599. 22 (MH+600. 3) NMR (400MHz, CDC13) : 1H 1.26 ppm (6H, d), 3.10 ppm (3H, s), 3.51 ppm (2H, t), 4.1 ppm (1H, q), 4.43 ppm (2H, s), 4.58 ppm (3H, t), 4.6 ppm (2H, bs), 6.42 ppm (1H, s), 6.72 ppm (1H, s), 6.85 ppm (1H, s), 7.09 ppm (1H, bs), 7.31 ppm (2H, d), 7.80 ppm (2H, d).

Isolated as 2.6TFA andl H20 Found C: 54.08 H: 5.55 N: 16.35 Calc. C: 42.30 H: 4.16 N: 10.18 Example 107 Example 107: To free amidine (680 mg, 1.28 mmol) and hydroxylamine hydrochloride (266 mg, 3.83 mmol) in 12 ml of ethanol was added N, N-diisopropylethylamine. (1. 11 ml, 6.38 mmol). The solution was heated at 70°C for 3 hours. The solution was concentrated, dissolved in CH3CN/H20, and acidified with trifluoroacetic acid. The solution was purified by reverse phase chromatography with 5-45% CH3CN/H20 to give 410 mg (40% yield) of a white solid m/z (M+H) +550 Analysis: C28H35N7O5 + 2.15 TFA + 0.55 H20 calcd: C, 48.21 ; H, 4.79 ; N, 12. 18 ; found: C, 48.22 ; H, 4.77 ; N, 12.20.

HRMS calcd: 550.2772 ; Found: 550.2761 1H NMR (400MHz, DMSO): 0.91 (3H, t), 1.22 (6H, d), 1.40 (2H, sextet), 1.64 (2H, quintet), 4.09 (1H, m), 4.21 (2H, t), 4.35 (2H, d), 4.38 (2H, s), 6.70 (1H, s), 6.77 (1H, t), 7.12 (lH, t), 7.27 (1H, t), 7.38 (2H, d), 7.63 (2H, d), 8.67 (1H, t).

Example 109 ethyl 3-amino-5- [1- (2- [4- ( (E)- amino [ (benzyloxy) carbon. imino} methyl) benzyl] amino}-2- oxoethyl)-5- (cyclopropylamino)-6-oxo-1, 6-dihydropyrazin-2- yl] benzoate Example 109. : To a solution of free acid (0. 50 g, 0. 13 mmol) in DMF (15 mL) at 0 °C was added DIEA (1. 0 mL, 0. 57 mmol) and TBTU (0. 62 g, 0. 19 mmol). After 15 min, 4- aminomethyl-Z-benzamidine (0. 62 g, 0. 19 mmol) was added and the reaction stirred for 1 h. The mixture was poured into water and ethyl acetate and the layers separated. The organic layer was washed with brine and dried (Na2SO4). The solvent was removed in vacuo to give a solid, which was purified by RP-HPLC (CH3CN : H2O) to give after lyophilization the desired product (390 mg NMR (400 MHz, CD30D) : d 7. 73 (d, 2 H), 7. 49-7. 37 (m, 7 H), 7. 29 (t, 1 H), 6. 89 (t, 1 H), 6. 68 (s, 1 H), 5. 39 (s, 2 H), 4. 58 (s, 2 H), 4. 46 (d, 2 H), 4. 30 (q, 2 H), 2. 80-2. 76 (m, 1 H), 1. 32 (t, 3 H), 1. 07- 1. 04 (m, 2 H), 0. 87-0. 84 (m, 2 H) ; MS-ESI (M+H) = 638 ; Analysis : C34H35N7O6 + 2. 6 TFA + 1. 5 H20 calcd : C, 48. 98 ; H, 4. 25 ; N, 10. 2 ; found : C, 48. 99 ; H, 4. 24 ; N, 10. 18.

Example 110 Example 110a : Into a solution of (3-amino-5- carboxylphenyl) boronic acid (1.0 g, 5.5 mmol) in 2- methoxyethanol (15 ml) was bubbled hydrogen chloride gas for 5 minutes. The reaction was sealed and heated at 85 °C for two hours. The reaction was concentrated in vacuo and the residue crystallized from methanol/diethyl ether to give 1.22 g of Example 110a as an off-white solid. 1HNMR (300 MHz, DMSO-d6) 5 3.30 (s, 3H), 3.62-3. 68 (m, 2H), 4.36-4. 42 (m, 2H), 7.56 (s, 1H), 7.69 (s, 1H), 7.88 (s, 1H). LCMS (ES+) m/z 240.

Example 110b : Into a solution of (3-amino-5- carboxylphenyl) boronic acid (1.0 g, 5.5 mmol) in n-butanol (15 ml) was bubbled hydrogen chloride gas for 5 minutes.

The reaction was sealed and heated at 85 °C for two hours.

The reaction was diluted with diethyl ether and the resulting crystals collected by vacuum filtration to give 1. 2 g of a colorless solid (ca. 40 mole % n-butanol). LCMS (ES+) m/z 238.

Example 110c : Into a stirred, nitrogen purged vessel were placed pyrazinone-bromide (0. 58 g, 1.7 mmol), Example 110a (0.7g, 2.5 mmol), cesium carbonate (1.65 g, 5.1 mmol), tetrakis triphenylphosphine palladium (0) (0.39 g, 0.34 mmol), acetonitrile (20 ml), and water (2 ml). The mixture was heated at 75 °C for 18 hours and 90 °C for 2 hours. The organic portion of the reaction was filtered and the filtrate concentrated in vacuo. The residue was mixed with ethyl acetate, washed with water, brine, dried over magnesium sulfate, filtered, and concentrated in vacuo.

Purification by silica gel chromatography (33-50% ethyl acetate/hexane) gave 0.51 g (66% yield) of Example 110c as a tan solid. LCMS (ES+) m/z 459.

Example llOd : LCMS (ES+) m/z 403.

Example 110e : To a stirred solution of Example 110d (200 mg, 0.46 mmol), 4-aminometyl-Z-benzamidine (204 mg, 0.64 mmol), and N-methylmorpholine (0.3 ml, 2.73 mmol) in N, N-dimethylacetamide (4 ml) cooled in an ice bath was added TBTU (161 mg, 0.5 mmol). Stirring was continued at ambient temperature for 1.5 hours. Purification by reverse phase HPLC (10-55% acetonitrile/water) followed by lyophilization yielded 169 mg (38% yield) of Example 110e as an off-white solid. lHNMR (300 MHz, DMSO-d6) 8 0.62-0. 79 (m, 4H), 2.70- 2.80 (m, 1H), 3.58-3. 63 (m, 2H), 4.40-4. 50 (m, 6H), 5.33 (s, 2H), 6.74 (s, 1H), 6.77 (s, 1H), 7.10 (s, 1H), 7.27 (s, 1H), 7.39 (d, J = 8.4 Hz, 2H), 7.39-7. 50 (m, 5H), 7.73 (d, J = 8.4 Hz, 2H), 8.67 (t, J = 6.0 Hz, 1H), 10.41 (br s, 1H).

HRMS (ES) calcd for C3SH38N, 07 (M+H) : 668.2827. Found: 668.2805. Anal. Calcd for C37H37N7O7 + 2.45 TFA + 0.75 H2O : C, 49.88 ; H, 4.29 ; N, 10.20. Found: C, 49.90 ; H, 4.32 ; N, 10.18.

Example 111 Example 111 : To a stirred solution of free acid (167 mg, 0.41 mmol), amono-oxadiazol (160 mg, 0.57 mmol), and N- methylmorpholine (0. 19 ml, 2.04 mmol) in N, N- dimethylacetamide (4 ml) cooled in an ice bath was added TBTU (144 mg, 0.45 mmol). Stirring was continued at ambient temperature for 1.5 hours. Purification by reverse phase HPLC (15-70% acetonitrile/water) followed by lyophilization yielded 134 mg (44% yield) of Example 111 as a pale yellow solid. 1HNMR (300 MHz, DMSO-d6) 8 0.68-0. 82 (m, 4H), 1.26 (t, J = 7.1 Hz, 3H), 2.70-2. 82 (m, 1H), 4.25 (q, J = 7. 2 Hz, 2H), 4.36 (d, J = 5.7 Hz, 2H), 4.40 (s, 2H), 6.75 (s, 1H), 6.79 (s, 1H), 7.12 (s, 1H), 7.30 (s, 1H), 7.37 (d, J = 8.1 Hz, 2H), 7.98 (d, J = 8.4 Hz, 2H), 8. 63 (t, J = 5.7 Hz, 1H).

19FNMR (282 MHz, DMSO-dó) 6-65. 11 (s). HRMS (ES) calcd for C2, H, 7N7O5F3 (M+H) : 598. 2020. Found: 598.1978. Anal. Calcd for C28H26N705F3 + 1.2 TFA + 0.1 H2O : C, 49. 59 ; H, 3,75 ; N, 13.31. Found: C, 49.65 ; H, 3.86 ; Ni 13.18.

Example 112 benzyl 3-amino-5-[1-[2-({4-[(E)- amino (hydroxyimino) methyl] benzyl} amino)-2-oxoethyl]-5- (cyclopropylamino)-6-oxo-1, 6-dihydropyrazin-2-yl] benzoate benzyl 3-amino-5- [1- (2-tert-butoxy-2-oxoethyl)-5- (cyclopropylamino)-6-oxo-1, 6-dihydropyrazin-2-yl]benzoate Example 112a: To a solution of pyrazinone-bromide (0.58 g, 0.17 mmol) and 3-amino-5- [(benzyloxy)carbonyl]phenylboronic acid (0.68 g, 0.25 mmol) in CH3CN : H20 (30 mL: 3 mL) was added Cs2C03 (2.19 g, 0.67 mmol) and Pd (PPh3) 4 (0. 58 g, 0.05 mmol). The reaction mixture was heated to 80 °C for 5 hrs and then allowed to cool to room temperature. The mixture was poured into water and ethyl acetate. The layers were separated and the organic layer washed with sodium bicarbonate and brine. The organic extract was dried (Na2S04) and the solvent removed to give a brown solid, which after chromatography (silica, 60-100% ethyl acetate: hexane) gave the product as a brown solid (0.64 g, 78%). H NMR (300 MHz, CDCl3) : d 7.42-7. 37 (m, 5 H), 6.88 (s, 1 H), 6.81 (bs, 1 H), 6.26 (bs, 1 H), 5.34 (s, 2 H), 4.38 (s, 2 H), 3.89 (s, 2 H), 2.82-2. 79 (m, 1 H), 1.40 (s, 9 H), 0.89-0. 85 (m, 2 H), 0.63-0. 61 (m, 2 H); MS-ESI (M+H) = 491.

[6- {3-amino-5- [ (benzyloxy) carbonyl] phenyl}-3- (cyclopropylamino)-2-oxopyrazin-1 (2H)-yl] acetic acid Example 112b : To a round bottom flask containing Example 112a (0.64 g, 0.10 mmol) was added 4N HCl in dioxane (15 mL) at room temperature. The reaction mixture was heated to 50 °C for 2 hrs and then allowed to cool to room temperature. The precipitate was filtered and the solid collected (0.43 g, 100%). MS-ESI (M+H) = 435. benzyl 3-amino-5-E1-{2-r (4-cyanobenzyl) amino]-2-oxoethyl)-5- (cyclopropylamino)-6-oxo-1, 6-dihydropyrazin-2-yl] benzoate Example 112c: To a solution of Example 112b (0.43 g, 0. 10 mmol) in DMF (10 mL) at 0 °C was added DIEA (0.77 mL, 0.44 mmol) and TBTU (0.48 g, 0.15 mmol). After 15 min, 4- aminomethyl-benzonitrile (0. 25 g, 0.15 mmol) was added and the reaction stirred for 1 hr. The mixture was poured into water and ethyl acetate. The layers were separated and the organic layer washed with brine and dried (Na2SO4). The solvent was removed to give a yellow oil (0.55 g, 100%). MS- ESI (M+H) = 549.

Example 112d: To a solution of Example 112c (0.55 g, 0.10 mmol) in ethanol (20 mL) at room temperature was added K2CO3 (0.57 g, 0.44 mmol), DIEA (0.82 mL, 0.44 mmol) and H2NOH*HCl (0.15 g, 0.22 mmol). The reaction was heated to reflux for 4 hrs and then cooled to room temperature. The mixture was filtered and the solid collected. The solid was purified by RP-HPLC (CH3CN : H2O) to give the desired product (260 mg). 1H NMR (400 MHz, CD30D) : 7.59 (d, 2 H), 7.49- 7.32 (m, 7 H), 6.91 (t, 1 H), 6.68 (s, 1 H), 5.30 (s, 2 H), 4.55 (s, 2 H), 4.36 (d, 2 H), 2.80-2. 76 (m, 1 H), 1.08 (m, 2 H), 0.87-0. 83 (m, 2 H); MS-ESI (M+H) = 582 ; Analysis: C31H3lN705 + 2.8 TFA + 0.8 H20 calcd: C, 48.02 ; H, 3.89 ; N, 10.71 ; found: C, 47.99 ; H, 3.85 ; N, 10.78.

Example 113 Example 113a: 1. 1 g (3 mmol) di-Boc-4-amino-N-hydroxy- benzamidine was deprotected in 25 mL CH2Cl2/TFA (4: 1) for 30 minutes with stirring and the solvent was thoroughly evaporated to dryness. This solid and 1 g (2 mmol) of the free acid were dissolved in 25 mL DMF. They were coupled in the presence of 0.96 g (3 mmol) TBTU and 1.75 mL (10 mmol) DIPEA for 12 hours. DMF was evaporated and the product was precipitated by addition of 200 mL water and filtered. The crude product was dissolved in the mixture of AcN and H20 and purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the product at 48% AcN, 0.41 g (0.63 mmol; 63%) as a white solid. MH+ =650. 4 Example 113b: 0. 41 g (0.63 mmol) of the boc-protected Example 113a was deprotected in 5 mL CH2C12/TFA (4: 1) with stirring for 30 minutes. The solvent was evaporated and the residue was dissolved in AcN/H2O and purified on preparative HPLC using a gradient of acetonitrile (10-40% AcN in 30 minutes), yielding the title product at 28% AcN, 0.28 g (0.51 mmol; 81%) as a white solid. MH+ =550. 4 1HNMR : 400 MHz, CD30D : 7.68-7. 60 (d, 2H), 7.50-7. 42 (d, 2H), 6.65 (s, 1H), 6.60-6. 48 (d, 2H), 6.38 (s, 1H), 4.60 (s, 2H), 4.50-4. 42 (m, 2H), 4.10-3. 98 (m, 1H) and 1.40-1. 22 (m, 15H).

Elemental analysis : C28H3sN7os + 1. 8xTFA + 1. 8xH20 Found C: 47.61 H: 4.89 N: 12.18 Calc. C: 47.50 H: 4.94 N: 12.04 Example 114 Example 114a: 0.83g (2 mmol) of Boc-protected phenol was reacted with 0.66 g (5 mmol; 0.9 mL) benzylisocyanate in 25 mL CH2Cl2 in the presence of 1.75 mL (10 mmol) DIPEA with stirring for 1 hour. The solvent was evaporated and the residue was dissolved in AcN, diluted with H, O and purified on prep HPLC using a gradient of acetonitrile (20-55% AcN in 30 minutes), yielding the title product at 48% AcN, 0.60g (1.1 mmol; 55%) as a solid. MH+ =552. 3 Example 114b: 1.06 g (2.2 mmol) di-Boc-4-amino-Z- benzamidine was deprotected in 25 mL CH2Cl2/TFA (4: 1) for 30 minutes with stirring and the solvent was thoroughly evaporated to dryness. This solid and 0.6 g (1.1 mmol) of Example 114a were dissolved in 25 mL DMF. They were coupled in the presence of 0.64 g (2 mmol) TBTU and 1.75 mL (10 mmol) DIPEA for 12 hour. DMF was evaporated and the product was precipitated by addition of 200 mL water, filtered and purified on prep HPLC using a gradient of acetonitrile (20- 60% AcN in 30 minutes), to yield 0.42 g (0.51 mmol; 47%) as a white solid. MH+ =817. 2 Example 114c: 0.4 2g (0.51 mmol) of Example 114b was deprotected in 25 mL CH2Cl2/TFA (4: 1) with stirring for 30 minutes. The solvent was evaporated and the residue was dissolved in AcN/H2O and purified on prep HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the title product at 35% AcN, 0.255 g (0.35 mmol; 68%) as a white solid. Mu-"=717. 2 HNMR : 400 MHz, CD30D : 7.78-7. 68 (d, 2H), 7.50-7. 16 (m, 12H), 6.65 (s, 1H), 6.60-6. 50 (d, 2H), 6.46 (s, 1H), 5.38 (s, 2H), 4.64 (s, 2H), 4.42 (s, 2H), 4.34 (s, 2H), 4.10-3. 96 (m, 1H) and 1.40-1. 30 (m, 6H).

Elemental analysis : + 2. 1xTFA + 0. 5xH2O Found C: 53.62 H: 4.59 N: 11.85 Calc. C: 53.76 H: 4.50 N: 11.61 Example 115 Example 115a: 0.42g (1 mmol) of Boc-protected phenol was reacted with 0.36 g (3 mmol; 0.32 mL) cyclopropanecarbonyl chloride in 40 mL CH2Cl2 in the presence of 0.875 mL (5 mmol) DIPEA with stirring for 30 minutes. The solvent was evaporated and the residue was dissolved in AcN, diluted with H2O and purified on prep HPLC using a gradient of acetonitrile (20-55% AcN in 30 minutes), yielding the product at 50% AcN, 0.34g (0.7 mmol; 47%) as a solid. MH+ =487. 2 Example 115b: 1.06 g (2.2 mmol) di-Boc-4-amino-Z- benzamidine was deprotected in 25 mL CH2C12/TFA (4: 1) for 30 minutes stirring and the solvent was thoroughly evaporated to dryness. This solid and 0.34 g (0. 7 mmol) of Example 115a were dissolved in 25 mL DMF. They were coupled in the presence of 0.8 g (2.5 mmol) TBTU and 1.75 mL (10 mmol) DIPEA for 12 hour. DMF was evaporated and the product was precipitated by addition of 200 mL water, filtered and dried to yield 0.4 g (0.53 mmol; 76%) as a white solid. MH+=752. 2 Example 115c: 0.4 g (O. 53 mmol) of Example 115b was deprotected in 25 mL CH2Cl2/TFA (4: 1) with stirring for 30 minutes. The solvent was evaporated and the residue was dissolved in AcN/H2O and purified on prep HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the title product at 38% AcN, 0.395g (0.45 mmol; 64%) as a white solid. MH =652. 2 1HNMR : 400 MHz, CD30D : 7.78-7. 72 (d, 2H), 7.52-7. 46 (d, 2H), 7.45-7. 25 (m, 5H), 6.64 (s, 1H), 6.60-6. 50 (d, 2H), 6.42 (s, 1H), 5.40 (s, 2H), 4.60 (s, 2H), 4.50-4. 46 (m, 2H), 4.10-3. 97 (m, 1H), 1.90-1. 78 (m, 1H), 1.40-1. 30 (m, 6H) and 1.10-1. 01 (m, 4H).

Elemental analysis : C3sH37N706 + 1. 6xTFA + 1. 5xH20 Found C: 52.84 H: 5.01 N: 11.20 Calc. C: 52.62 H: 4.95 N: 11.24 Example 116 Example 116a : To the free acid (0.51 g, 1.25 mmol) and 4-aminobenzonitrile (252 mg, 1.5 mmol) in 5 ml of N, N- dimethylformamide was added N, N-diisopropylethylamine (0.87 ml, 5.0 mmol) and then benzotriazol-1-yl tetramethyluronium tetrafluoroborate (482 mg, 1.5 mmol). The solution was stirred for 30 minutes. The solution was added to a stirring solution of 100 ml of water. The resulting precipitate was collected by vacuum filtration and dried over phosphorous pentoxide under high vacuum to give 476 mg (78% yield) of a yellow solid. m/z (M+H) +487 Example 116b: To the product of Example 116a (452 mg, 0.93 mmol), hydroxyl amine hydrochloride (266 mg, 2.33 mmol) and potassium carbonate (0.64 g, 4.65 mmol) in 10 ml of ethanol was added N, N-diisopropylethylamine (0.81 ml, 4.65 mmol). The solution was heated at 70°C for 2 hours.

Another portion of hydroxyl amine hydrochloride (266 mg, 2.33 mmol) and N, N-diisopropylethylamine (0.81 ml, 4.65 mmol) was added and the solution was heated at 70°C for 6 hours. Acetonitrile was added and the mixture was decanted.

The organic layer was concentrated and the residue was treated with acetonitrile. The mixture was acidified with trifluoroacetic acid and purified by reverse phase chromatography with 5-40% CH3CN/H2O to give 390 mg (50% yield) of a white solid m/z (M+H) +520 Analysis: C2, H29N70, + 2.60 TFA + 1.10 H20 calcd: C, 44.83 ; H, 4.08 ; N, 11.73 ; found: C, 44.79 ; H, 4.03 ; N, 11.81.

HRMS calcd: 520.2303 ; Found: 520. 2303 1H NMR (400MHz, DMSO): 0.70 (2H, br s), 0.79 (2H, m), 1.28 (3H, t), 2.77 (1H, m), 4.26 (2H, q), 4.35 (2H, d), 4.38 (2H, s), 6.76 (1H, s), 6.78 (1H, s), 7.12 (1H, s), 7.29 (1H, s), 7.36 (2H, d), 7. 62 (2H, d), 8.68 (1H, t), 9.05 (1H, br s).

Example 117 Example 117: To the free acid (0.25 g, 0.573 mmol) and benzyl [4- (aminomethyl) phenyl] (imino) methylcarbamate hydrochloride (219 mg, . 688 mmol) in 2.5 ml of N, N- dimethylformamide was added N, N-diisopropylethylamine (0.40 ml, 2.29 mmol) and then benzotriazol-1-yl tetramethyluronium tetrafluoroborate (0.22 g, 0.688 mmol). The solution was stirred for 1.5 hours and then treated with trifluoroacetic acid (0.22 ml, 2.87 mmol). The solution was then purified by reverse phase chromatography with 10-60% CH3CN/H2O to give 290 mg (58% yield) of an off-white solid m/z (M+H)'"666 Analysis: C3, H39N706 + 1.85 TFA + 0.45 H20 calcd: C, 53.89 ; H, 4.76 ; N, 11.08 ; found: C, 53.91 ; H, 4.80 ; N, 11.02.

HRMS calcd: 666.3035 ; Found: 666.3073 1H NMR (400MHz, DMSO): 0.67 (2H, m), 0.75 (2H, m), 0.90 (3H, t), 1.39 (2H, sextet), 1.62 (2H, quintet), 2.76 (1H, m), 4. 21 (2H, t), 4.36 (2H, d), 4.38 (2H, s), 5.32 (2H, s), 6.75 (1H, s), 6.78 (1H, t), 7.12 (1H, s), 7.27 (1H, s), 7.35-7. 49 (7H, m), 7. 75 (2H, d), 8. 68 (1H, t).

Example 118 Example 118a: To bromo-pyrazinone (1. 16 g, 3.38 mmol), phenyl-boronic acid (1. 18 g, 4.32 mmol), and cesium carbonate (4.38 g, 13.5 mmol) in 55 ml of acetonitrile and 5.5 ml of water was added tetrakis (triphenylphosphine) palladium (0) under nitrogen. The mixture was heated at 75°C for 9 hours.

The aqueous layer was pipetted of and 50 ml of water was added. The mixture was concentrated to a small volume and then extracted with ethyl acetate. The organic layer was dried over magnesium sulfate, filtered and concentrated in vacuo to give-4g of an orange oil. The oil was dissolved in dichloromethane and purified by silica gel chromatography with 10-60% EA/Hex to give 1. 6 g of an orange oil. This oil was dissolved in 200 ml ethyl acetate and 5 ml of dichloromethane and stirred overnight. The mixture was filtered and then concentrated. The residue was purified by silica gel chromatography with 45-65% EA/Hex to give 740 mg (48% yield) of a yellow-orange oil. m/z (M+H) +457 Example 118b: To the product from Example 118a (0.733 g, 1.61 mmol) was added 4M hydrogen chloride in dioxane (10 ml, 40 mmol). The solution was heated at 60°C for 45 min.

The mixture was diluted with 100 ml of ethyl ether and the resulting precipitate was collected by vacuum filtration and dried over phosphorous pentoxide under high vacuum to give 0.66 g (94% yield) of a yellow solid. m/z (M+H) +401 Example 118c: To the product from Example 118b (0. 40 g, 0.917 mmol) and 4-aminobenzonitrile (185 mg, 1. 1 mmol) in 4 ml of N, N-dimethylformamide was added N, N- diisopropylethylamine (0.64 ml, 3.67 mmol) and then benzotriazol-1-yl tetramethyluronium tetrafluoroborate (0.353 g, 1.1 mmol). The solution was stirred for 1.5 hours. The solution was added to a stirring solution of 20 ml of water. The resulting precipitate was collected by vacuum filtration and dried over phosphorous pentoxide under high vacuum to give 460 mg (92% yield) of a tan solid m/z (M+H) +515 Example 118d: To the product from Example 118c (460 mg, 0.84 mmol), hydroxyl amine hydrochloride (292 mg, 4.20 mmol) and potassium carbonate (0.58 g, 4.2 mmol) in 10 ml of ethanol was added N, N-diisopropylethylamine (1.02 ml, 5.89 mmol). The mixture was heated at 70°C for 6 hours. The solution was treated with 10 ml of water and the precipitate was collected. The filtrate was treated with 10 ml of brine and the extracted with ethyl acetate. The organic was dried over sodium sulfate, filtered and econcentrated in vacuo to give a residue. The residue and the precipitate were dissolved in acetonitrile and acidified with trifluoroacetic acid. The solution was purified by reverse phase chromatography with 5-45% CH3CN/H2O to give 330 mg (50% yield) of an off-white solid m/z (M+H) 6548 Analysis: C28H33N705 + 2.15 TFA + 1.10 H2O calcd: C, 47.74 ; H, 4.63 ; N, 12.06 ; found: C, 47.72 ; H, 4.61 ; N, 12.05.

HRMS calcd: 548.2616 ; Found: 548.2608 1H NMR (400MHz, DMSO): 0.71 (2H, m), 0.79 (2H, m), 0.91 (3H, t), 1.40 (2H, sextet), 1.62 (2H, quintet), 2.76 (1H, m), 4.22 (2H, t), 4.35 (2H, d), 4.38 (2H, s), 6.77 (1H, s), 6.79 (1H, s), 7.12 (1H, s), 7.29 (1H, s), 7.37 (2H, d), 7.62 (2H, d), 8.68 (1H, t), 9.02 (1H, br s).

Example 119 tert butyl [6- [3-amino-5- (hydroxy) phenyl]-3-cyclopropylamino) -2-oxopyrazin-1 (2H) -yl] acetate Example 119a : 4.5 g (9.1 mmol) of t-butyl [6- [3-nitro- 5- (0-benzyl) phenyl]-3-cyclopropylamino)-2-oxopyrazin-1 (2H)- yl] acetate was dissolved in 50 mL MeOH and reduced in the presence of 2.5 g HCOONH4 and 0.2 g Pd black with stirring for 12 hours. The catalyst was filtered off and the solvent was evaporated to dryness. The crude product was dissolved in the mixture of AcN and H2O and purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the product at 30% AcN, 3.5 g (7.2 mmol ;- 79%) as a white solid. MH+ =373. 2 Example 119b : The residue of Example 119a was treated with 3 mL of TFA for 90 minutes with stirring and then TFA was evaporated to give an oil. MHI=317. 2 Example 119c : The of Example 119b was dissolved in 50 mL dioxane and 25 mL H2Oand the pH was adjusted to >8 by the addition of 2.5 N NaOH. 0.65 g (3 mmol) (Boc) 2° was added to the. mixture and it was stirred for 12 hours. Dioxane was evaporated and the residue was diluted with 50 mL of 10% KHSO4. It was extracted with 2x100 mL EtOAc. The organic phase was washed with brine, dried over MgS04 and the solvent was evaporated. Yield: 1.3 g (3.1 mmol; 43%) semi solid. MH+=417.3 Example 119d : 0.96 g (2 mmol) di-Boc-4-amino-Z- benzamidine was deprotected in 25 mL CH2Cl2/TFA (4: 1) for 30 minutes with stirring and the solvent was thoroughly evaporated to dryness. This solid and 0.7 g (1.7 mmol) of Example 119c were dissolved in 25 mL DMF. They were coupled in the presence of 0.64 g (2 mmol) TBTU and 1.75 mL (10 mmol) DIPEA for 1 hour. DMF was evaporated and the product was precipitated by addition of 200 mL water and filtered.

The crude product was dissolved in the mixture of AcN and H, o and purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the product at 47% AcN, 1.1 g (1.6 mmol; 65%) as a white solid.

Mu+ =682. 4 Example 119e : 0.61 g (0.9 mmol) of Example 119d was deprotected in 25 mL CH2C12/TFA (4: 1) for 30 minutes with stirring. The solvent was evaporated and the residue was dissolved in AcN/H2O and lyophilized to yield 0.72 g (0. 89 mmol; 55%) white solid.

MH+ =582. 4 1HNMR : 400 MHz, CD30D : 7.78-7. 72 (d, 2H), 7.54-7. 30 (m, 7H), 6.66 (s, 1H), 6.46-6. 26 (m, 3H), 5.40 (s, 2H), 4.60 (s, 2H), 4.52-4. 44 (m, 2H), 2.80-2. 70 (m, 1H), 1.08-1. 00 (m, 2H) and 0.90-0. 80 (m, 2H).

Elemental analysis : C31H3lN7Os + 2.8xTFA + 1. 2xH2O Found C: 47.52 H: 4.03 N: 10.80 Calc. C: 47.65 H: 3.96 N: 10.63 Example 121 HPLC/LRMS: >98%, 679 (M+H) +; HRMS (ES+) calcd. for C37H43N8O5 679.3351, found 679.3380.

Example 122 Example 122a: 1 g (3 mmol) N, N-di-Boc-4- aminobenzonitrile was deprotected in 25 mL CH2Cl2/TFA (4: 1) for 30 minutes and the solvent was evaporated thoroughly to dryness. 0.5 g (1.2 mmol) of the free acid was coupled with the 4-aminobenzo-nitrile in 30 mL DMF in the presence of 0.48 g (1.5 mmol) TBTU and 1.75 mL (10 mmol) DIPEA with stirring for 1 hours. DMF was evaporated and the product was precipitated by addition of 200 mL water, filtered and dried. Yield: 0.38 g (0.72 mmol; 60%) solid.

MH+=531. 2 Example 122b: 0.38 g (0.72 mmol) of Example 122awas dissolved in 25 mL EtOH and it was refluxed in the presence of 0.7 g (10 mmol) hydroxylamine. HCl and 1.75 mL (10 mmol) DIPEA for 4hours. The solvent was evaporated and the product was purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes). Yield: 0.26 g (0.46 mmol; 64%) as a white solid. MH+ =564. 2 . Example 122c: 0.26 g (0.46 mmol) of Example 122b was deprotected in 25 mL CH2Cl2/TFA (4: 1) with stirring for 30 minutes. The solvent was evaporated and the residue was dissolved in AcN/H2O and lyophilized to yield 0.22 g (0.32 mmol; 69%) white solid.

MH+ =464. 2 1HNMR : 400 MHz, CD30D : 7.70-7. 62 (d, 2H), 7.50-7. 40 (d, 2H), 6.67 (s, 1H), 6.60 (s, 1H), 6.56 (s, 1H), 6.50 (s, 1H), 4.59 (s, 2H), 4.46 (s, 2H), 2.84-2. 74 (m, 1H), 1.10-1. 02 (m, 2H) and 0.90-0. 80 (m, 2H).

Elemental analysis : C23H25N7OR + 2.4xTFA + 1. 5xH2O Found C: 43.79 H: 4.09 N: 12.73 Calc. C: 43.69 H: 4.01 N: 12.83 Example 123 ethyl 3-amino-5- [l- {2- [ (4- { (Z)- amino [ (phenoxycarbonyl) imino] methyl} benzyl) amino]-2- oxoethyl}-5- (cyclopropylamino)-6-oxo-1, 6-dihydropyrazin-2- yl] benzoate ethyl 3-amino-5-[1-[2-({4-[amino (imino) methyl] benzyl} amino)- 2-oxoethyl]-5- (cyclopropylamino)-6-oxo-1, 6-dihydropyrazin-2- ylZbenzoate Example 123a: To a Parr bottle containing Z-protected amidine (1.7 g, 2.7 mmol) was added ethanol (40 mL) and concentrated HC1 (4 drops). The reaction was shaken on Parr hydrogenator for 2 hrs and 40 psi. The mixture was filtered through Celite and the solvent removed in vacuo to give a yellow solid (0.97 g, 73%). MS-ESI (M+H) = 505.

Example 123b: To a solution of Example 123a (0.48 g, 0.95 mmol) was added NMM (0.46 mL, 4.2 mmol) and diphenyl carbonate (0.22 g, 1.0 mmol). The reaction was stirred overnight at room temperature and then purified by RP-HPLC (CH3CN : H2O) to give the desired product (120 mg). 1H NMR (400 MHz, CD30D) : $ 7.82 (d, 2 H), 7.49-7. 29 (m, 9 H), 6.90 (t, 1 H), 6. 69 (s, 1 H), 4. 59 (s, 2 H), 4. 49 (d, 2 H), 4. 32 (q, 2 H), 2.81-2. 75 (m, 1 H), 1.35 (t, 3 H), 1.06-1. 02 (m, 2 H),'0. 86-0.84 (m, 2 H); MS-ESI (M+H) = 624 ; Analysis : C33H33N706 + 2.15 TFA + 2.05 H2O calcd: C, 49.45 ; H, 4.36 ; N, 10.82 ; found: C, 49.45 ; H, 4.32 ; N, 10.89.

Example 124 Example 124: To free amidine (296 mg, 0.62 mmol) and Z-chloride (187 mg, 0.69 mmol) in 4 ml of N, N- dimethylformamide was added N-methylmorpholine (0.274 ml, 2.5 mmol). The solution was stirred for 40 hours. The solution was treated with trifluoroacetic acid (0.24 ml, 3.12 mmol) and purified by reverse phase chromatography with 5-40% CH3CN/H2O to give 56 mg (11% yield) of a light yellow solid. m/z (M+H) +610 Analysis: C32H3lN706 + 1.70 TFA + 1.95 H20 calcd: C, 50.70 ; H, 4.40 ; N, 11.69 ; found: C, 50.65 ; H, 4.33 ; N, 11.82.

HRMS calcd: 610.2409 ; Found: 610.2413 1H NMR (400MHz, DMSO): 0.66 (2H, br s), 0.75 (2H, br d), 2.76 (1H, m), 4.36 (2H, d), 4.38 (2H, s), 5.33 (2H, s), 6.74 (1H, s), 6.75 (1H, s), 7.09 (1H, s), 7.27 (1H, s), 7.36-7. 49 (8H, m), 7.75 (2H, d), 8.68 (1H, br s).

Example 125 Example 125: To free amidine (284 mg, 0.60 mmol), hydroxyl amine hydrochloride (124 mg, 1.79 mmol) and potassium carbonate (0.41 g, 2.99 mmol) in 5 ml of ethanol was added N, N-diisopropylethylamine (0.52 ml, 2.99 mmol).

The mixture was heated at 70°C for 3 hours. The solution was acidified with trifluoroacetic acid (1.0 ml, 13 mmol) and purified by reverse phase chromatography with 5-20% CH3CN/H2O to give 110 mg (24% yield) of a white solid m/z (M+H) +492 Analysis: C24H25N7Os + 2. 55 TFA + 1.75 H2O calcd: C, 42.95 ; H, 3.85 ; N, 12.05 ; found: C, 42.95 ; H, 3.87 ; N, 12.05.

HRMS calcd: 492.1990 ; Found: 492.1987 'H NMR (400MHz, DMSO): 0.69 (2H, m), 0.78 (2H, m), 2.76 (1H, m), 4.35 (2H, d), 4.38 (2H, s), 6.74 (1H, s), 6.76 (2H, s), 7.10 (1H, s), 7.27 (1H, s), 7.37 (2H, d), 7.63 (2H, d), 8.67 (1H, t).

Example 126 Example 126: To a stirred solution of ethyl ester (90 mg, 0.12 mmol) in THF (3 ml) and ethanol (2 ml) cooled in ice bath was added 2N lithium hydroxide (0.152 mL, 0.3 mmol). The reaction was stirred at ambient temperature for 48 hours. Purification by reverse phase HPLC (10-80% acetonitrile/water) followed by lyophilization yielded 5.5 mg of an off-white solid. 1HNMR (300 MHz, DMSO-d6) 8 0. 63- 0.78 (m, 4H), 2.70-2. 80 (m, 1H), 4.36 (d, J = 6.0 Hz, 2H), 4.39 (s, 2H), 6.73 (s, 1H), 6.76 (s, 1H), 7.10 (s, 1H), 7.27 (s, 1H), 7.41 (d, J = 8.4 Hz, 2H), 8.00 (d, J = 8.1 Hz, 2H), 8.62 (t, J = 5. 7 Hz, 1H). 19FNMR (282 MHz, DMSO-d6) 8-65. 08 (s). HRMS calcd for C26H23N7O5F3 (M+H) : 570. 1707. Found: 570.1698.

Example 127 Example 127a: A solution of tert-butyl [6-bromo-3- (cyclopropylamino)-2-oxopyrazin-1 (2H)-yl] acetate (500mg, 1.46mmol), 3-amino-5-{[2-(dimethylamino) ethoxy]- carbonyl} phenylboronic acid (0. 6g, 2. 2mmol), Cs2C03 (1. 9g, 5. 84mmol) and [Pd (PPh3) 4] ( 500mg, 0. 44mmol) in a mixture of MeCN (10ml) and water (2ml) was heated at 75°C overnight. The solid was filtered. Water (200ml) was added and MeCN was then removed by rotavapor. Aqueous solution was then extracted with EtOAc (2X300ml The combined EtOAc was then dried over MgS04 and concentrated without purification to yield 560mg solid (81%).

Example 127b: 0.56g, 1.27mmol of Example 127a in HCl/Dioxane (4N, 10ml) was heated at 65°C for 1 hr and concentrated to yield 0.5g brown solid (95%).

Example 127c : 0.5g, 1. 2mmol of Example 127b, benzyl [4- (aminomethyl) phenyl] (imino) methylcarbamate (460mg, 1. 45mmol), TBTU (385mg, 1. 2mmol) and DIEA (775mg, 6mmol) in 20ml of DMF was kept stirring at RT for 2hr. The mixture was then purified on RP-HPLC to yield 0.688g solid (53%).

HRMS calcd for C36H40N806 (M+H): 681.3144. Found: 681.3142.

Anal. Calcd for C36H40N8O6 + 3.45TFA+2H20 : C: 46.41 ; H: 4.30 ; N: 10.09.

Found: C: 46.37 ; H: 4.19 ; N: 10.28.

1H NMR (DMSO-d6, 300 MHz) 5 0.64 (m, 2H), 0.73 (m, 2H), 2.74 (m, 1H), 2.86 (bs, 7H), 3.47 (bs, 2H), 4.37 (m, 5H), 4.47 (d, 1H), 4.53 (m, 3H), 5.21 (s, 1H), 5.32 (s, 2H), 6.73 (s, 1H), 6.81 (m, 1H), 7.19 (t, 1H), 7.29 (t, 1H), 7.38-7. 46 (m, 6H), 7.76 (m, 2H), 7.90 (m, 1H), 8.72 (t, 1H).

Example 128 Example 128a: 3- (dihydroxyboryl)-5-nitrobenzoic acid (1. 4g, 5mmol) in 32ml of THF was added SOC12 (4ml) and 2drops of DMF. The mixture was heated to reflux for 2hr and concentrated. THF (4ml) was added and the mixture was cooled to 0°C. Then 2- (dimethylamino) ethanol (0.54g, 6mmol) and Et3N (0. 3g, 3mmol) was added. The mixture was kept stirring at RT for 5hr, then concentrated and purified with RP-HPLC to yield 1g white solid (71%).

C11H15B1N206 M. W. 282. 06.

1H NMR (DMSO-d6, 300 MHz) 5 2.90 (s, 6H), 3.58 (m, 2H), 4.66 (m, 2H), 8.78-8. 88 (m, 3H).

Example 128b: A solution of Example 128a (0. 18g, 0. 64mmol) in EtOH (20 ml) was added Pd/C (10%). The mixture was set on hydrogenation shake at 40psi for 3hr, then filtered and concentrated to yield 0.16g solid (99%).

C11H17B1N204 M. W. 252. 07.

Example 128c: A solution of tert-butyl [6-bromo-3- (isopropylamino)-2-oxopyrazin-1 (2H)-yl] acetate (lOOmg, 0. 29mmol), 3-amino-5-{[2-(dimethylamino) ethoxy]- carbonyl} phenylboronic acid (0. 14g, 0.52mmol), Cs2C03 (0.4g, 1. 2mmol) and [Pd (PPh3) 4] (100mg, 0. 087mmol) in a mixture of MeCN (2ml) and water (0. 5ml) was heated at 75°C overnight. The solid was filtered. Water (200ml) was added and MeCN was then removed by rotavapor. Aqueous solution was then extracted with EtOAc (2X300ml) and combined EtOAc was then dried over MgS04 and concentrated without purification to yield 94mg solid (69%).

C24H35N5O5 M. W. 473.57.

Example 128d: 0. lg, 0. 21mmol of Example 128c in HCl/Dioxane (4N, 2ml) was heated at 65°C for 1 hr and concentrated to yield 80mg brown solid (91%).

C20H27NsOs M. W. 417.46.

Example 128e: 0. 1g, 0. 24mmol of Example 128d, benzyl [4- (aminomethyl) phenyl] (imino) methylcarbamate (92mg, 0. 29mmol), TBTU (77mg, 0. 24mmol) and DIEA (155mg, 1. 2mmol) in 5ml of DMF was kept stirring at RT for 2hr. The mixture was then purified on RP-HPLC to yield 0.12g solid (46%).

HRMS calcd for C36H42NeO6 (M+H): 683.3300. Found: 683.3282.

Anal. Calcd for C36H42N8Oó + 3.55TFA+1. 4H20: C: 46.52 ; H: 4.37 ; N: 10.06.

Found: C: 46.47 ; H : 4.32 ; N: 10.18.

1H NMR (DMSO-d6, 300 MHz) 1.20 (d, 6H), 2.85 (bs, 7H), 3.46 (bs, 2H), 4.09 (m, 3H), 4.38 (m, 5H), 4.53 (m, 3H), 5.21 (s, 1H), 5.31 (s, 1H), 6.68 (s, 1H), 6.81 (d, 1H), 7.19 (s, 1H), 7.29 (s, 1H), 7.38-7. 46 (m, 6H), 7.77 (m, 2H), 7.90 (m, 1H), 8.71 (t, 1H).

EXAMPLE 129 EXAMPLE 129: 0.4 g (0. 58 mmol) of Boc-protected aminophenol was dissolved in 10 mL CH2Cl2 and it was reacted with 0.11 g (1 mmol; 0.096 mL) ethylchloroformate in the presence of 0.175 mL (1 mmol) DIPEA for 1 hour with stirring. The solvent was evaporated and the remaining oil was dissolved in 5 mL AcN. The product was precipitated by addition of 200 mL H2O, filtered and dried. MH+ =756. 4 The white solid was dissolved in 25 mL CH2Cl2/TFA (4: 1) and stirred for 30 minutes. The solvent was evaporated and the residue was purified on prep HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), to yield (product peak at 47% AcN) 0.225 g (0.34 mmol; 59%) white solid Mu+ =656. 4 HNMR : 400 MHz, CD30D : 7.80-7. 72 (d, 2H), 7. 52-7.32 (m, 7H), 6.65 (s, 1H), 6.60-6. 54 (m, 2H), 6.46 (s, 1H), 5.40 (s, 2H), 4.60 (s, 2H), 4.46 (s, 2H), 4. 30-4. 18 (m, 2H), 4.10- 4.00 (m, 1H) and 1.36-1. 26 (m, 9H).

Elemental analysis : C34H37N7O7 + 1. 3xTFA + 3xH20 Found C: 51.45 H: 5.09 N: 11.26 Calc. C: 51.24 H: 5.20 N: 11.40 Example 130 Example 130a: A solution of tert-butyl [6-bromo-3- (cyclopropylamino)-2-oxopyrazin-1 (2H) -yl] acetate (3.6g, 10. 5mmol), 3-amino-5- (ethoxycarbonyl) phenylboronic acid (4g, 2.19. lmmol), Cs2CO3 (13.6g, 42mmol) and [Pd (PPh3) 4] ( 3.64g, 3.15mmol) in a mixture of MeCN (200ml) and water (20ml) was heated at 75°C overnight. The solid was filtered.

Water (200ml) was added and MeCN was then removed by rotavapor. Aqueous solution was then extracted with EtOAc (2X300ml) and combined EtOAc was then dried over MgS04 and concentrated without purification to yield 2.9g solid (65%).

C22H28N405 M. W. 428. 48.

Example 130b: 2.9g, 6. 78mmol of Example 130a in HCl/Dioxane (4N, 35ml) was heated at 65°C for 1 hr and concentrated to yield 2.5g brown solid (99%).

CieH2oN4Os M. W. 372. 38.

H NMR (DMSO-d6, 300 MHz) 5 0. 84 (m, 2H), 0.90 (m, 2H), 1.30 (t, 3H), 2.80 (m, 1H), 4.28 (q, 2H), 4.36 (s, 2H), 6.79 (s, 1H), 6.86 (s, 1H), 7.17 (s, 1H), 7.40 (s, 1H), 7.59 (m, 1H), 9.74 (bs, 1H).

Example 130c: 0.19g, 0. 51mmol of Example 130b, the product of example 24b (221mg, lmmol), TBTU (193mg, 0. 54mmol) and DIEA (332mg, 2.5mmol) in 3ml of DMF was kept stirring at RT for 2hr. The mixture was then purified on RP- HPLC to yield O. lOg solid (23%).

HRMS calcd for C29H33N706 (M+H): 576.2565. Found: 576.2541.

Anal. Calcd for C29H33N7O6 + 2. 4TFA+1.5H20 : C: 46.32 ; H: 4.41 ; N: 11.18.

Found: C: 46.32 ; H: 4.44 ; N: 11.18.

'H NMR (DMSO-d6, 300 MHz) 8 0.69 (m, 2H), 0.75 (m, 2H), 1.30 (m, 6H), 2.76 (m, 1H), 4.26-4. 39 (m, 10H), 6.75 (s, 1H), 6.78 (s, 1H), 7.11 (s, 1H), 7.28 (s, 1H), 7.38 (d, 2H), 7.72 (d, 2H), 8.68 (t, 1H), 10.46 (bs, 1H).

Example 131 Example 131: 0.2 g (0. 3 mmol) of Boc-protected phenol was dissolved in 10 mL CH2Cl2 and it was reacted with 0.028 g (0.4 mmol; 0.032 mL) ethylisocyanate in the presence of 0.088 mL (0.5 mmol) DIPEA for 1 hour with stirring. The solvent was evaporated and the remaining oil was dissolved in 5 mL AcN. The product was precipitated by addition of 200 mL H2O, filtered and dried. MH+ =755. 4 The white solid was dissolved in 5 mL CH2Cl2/TFA (4: 1) and stirred for 30 minutes. The solvent was evaporated and the residue was purified on prep HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), to yield (product peak at 40% AcN) 0.115 g (0.17 mmol; 58%) white solid.

Mu+ =655. 4 1HNMR : 400 MHz, CD30D : 7.78-7. 72 (d, 2H), 7.50-7. 42 (d, 2H), 7.41-7. 30 (m, 5H), 6.65 (s, 1H), 6.58-6. 50 (m, 2H), 6.42 (s, 1H), 5. 40 (s, 2H), 4.62 (s, 2H), 4.44 (s, 2H), 4.10-3. 98 (m, 1H), 3.24-3. 10 (m, 2H) and 1.40-1. 10 (m, 9H).

Elemental analysis : C34H38N8O6 + 1. 9xTFA + 2. 1xH20 Found C: 50.09 H: 4.95 N: 12.25 Calc. C: 49.94 H: 4.89 N: 12.32 Example 132 <BR> <BR> <BR> <BR> 2- [6- [3-amino-5- (trifluoromethyl) phenyl]-3- (isopropylamino)- 2-oxopyrazin-1 (2H)-yl]-N-{4-[5-(pentafluoroethyl)-1,2, 4- oxadiazol-3-yl] benzyl} acetamide di (tert-butyl) 4- [5- (pentafluoroethyl)-1, 2,4-oxadiazol-3- yl] benzylimidodicarbonate Example 132a: To a solution of di-bocaminobenzyl-4- hydroxamidine (0.51 g, 1.39 mmol) in dichloromethane (20 mL) was added pyridine (0.25 mL, 3.06 mmol) and pentafluoro- propionic anhydride (0.29 mL, 1.46 mmol) at 0 °C. The. reaction mixture was allowed to warm to room temperature and stirred for 2 hrs. The reaction mixture was diluted with water. The layers were separated and the aqueous layer extracted with dichloromethane (2x). The organic extracts were washed with brine (lx). The organic fractions were dried (Na2SO4) and the solvent removed in vacuo to give a white solid, which after chromatography (silica, 10% ethyl acetate/hexanes to 30 ethyl acetate/hexanes) gave Example 132a as a white solid (0.60 g). 1H NMR (400 MHz, CDC13) : b 8.06 (d, 2 H), 7.42 (d, 2 H), 4.83 (s, 2 H), 1.45 (s, 18 H); 19F NMR (371 MHz, CDCl3) : 8-83. 73 (s, 3 F), -116. 24 (s, 2 F); MS-ESI (M+H) = 494.

4-E5-(pentafluoroethyl)-1, 2, 4-oxadiazol-3-yl] benzylamine Example 132b: To a round bottom containing the product of Example 132a (0.60 g, 1.20 mmol) was added 4. ON HCl in dioxane (20 mL) at room temperature. After stirring for 3 hrs at room temperature the precipitate was filtered and dried on high vacuum to give a white powder Example 132b (0.349 g). 1H NMR (400 MHz, CD30D) : 8 8.20 (d, 2 H), 7.66 (d, 2 H), 4.21 (s, 2 H) ; 19F NMR (371 MHz, CD30D)-85. 60 (s, 3 F),-118. 03 (s, 2 F); MS-ESI (M+H) = 294.

Example 132c: To a solution of free acid (0.18 g, 0. 45. mmol) in DMF (10 mL) was added TBTU (0.17 g, 0.53 mmol) at 0 °C. After 5 min, Example 132b (0.19 g, 0.64 mmol) and DIEA (0.45 mL, 2.56 mmol) were added. The reaction was stirred for 1 hr and then diluted with water and ethyl acetate. The layers were separated and the organic layer washed with saturated sodium bicarbonate and dried (Na2SO4). The solvent was removed to give a semi-solid, which after chromatography (silica, 50: 50 ethyl acetate: hexane) gave Example 132c (0.21 g, 72%) as a white solid. 1H NMR (400 MHz, CD30D) : # 8.06 (d, 2 H), 7.43 (d, 2 H), 6.97 (s, 1 H), 6.85 (d, 2 H), 6.71 (s, 1 H), 4.52 (s, 2 H), 4.45 (s, 2 H), 4.12-4. 08 (m, 1 H), 1. 26 (d, 6 H); 15F NMR (371 MHz, CD30D) : 8-64. 84 (s, 3 F), -85.61 (s, 3 F), -118. 03 (s, 2 H); MS-ESI (M+H) = 646.

Example 133 <BR> <BR> <BR> 2-E6-E3-amino-5-(trifluoromethyl) phenyl]-3-(isopropylamino)- 2-oxopyrazin-1 (2H)-yl]-N-{4-[5-(heptafluoropropyl)-1,2, 4- oxadiazol-3-yl] benzyl} acetamide di (tert-butyl) 4- [5- (heptafluoropropyl)-1, 2, 4-oxadiazol-3- yl] benzylimidodicarbonate Example 133a: To a solution of di-bocaminobenzyl-4- hydroxamidine (0.75 g, 2.05 mmol) in dichloromethane (20 mL) was added pyridine (0.38 mL, 4.51 mmol) and heptafluoropropionic anhydride (0.53 mL, 2.15 mmol) at 0 °C.

The reaction mixture was allowed to warm to room temperature and stirred for 2 hrs. The reaction mixture was diluted with water. The layers were separated and the aqeous layer extracted with dichlormethane (2x). The organic extracts were washed with brine (lx). The organic fractions were dried (Na2SO4) and the solvent removed in vacuo to give a white solid, which after chromatography (silica, 10% ethyl acetate/hexanes) gave Example 133a as a white solid (0.92 g). 1H NMR (400 MHz, CDC13) : 8 8.07 (d, 2 H), 7.42 (d, 2 H), 4.84 (s, 2 H), 1.45 (s, 18 H) ; 19F (371 MHz, CD30D) : # -80. 62 (t, 3 F), -114. 16 (q, 2 F), -126. 85 (bs, 2 F); MS-ESI (M+H) = 544.

4- [5- (heptafluoropropyl)-1, 2, 4-oxadiazol-3-yl]benzylamine Example 133b: To a solution of the product of Example 133a (0.92 g, 1.70 mmol) was added 4. ON HCl in dioxane (20 mL) at room temperature. After stirring for 3 hrs at room temperature the precipitate was filtered and dried on high vacuum to give a white powder Example 133b (0.55 g). 1H NMR (400 MHz, CDOD) : 8 8. 20 (d, 2 H), 7. 67 (d, 2 H), 4. 22 (s, 2 H); 19F NMR (371 MHz, CD30D) : 6-82. 33 (t, 3 F), -115. 93 (q, 2 F), -128. 41 (bs, 2 F); MS-ESI (M+H) = 344.

Example 133c: To a solution of free acid (0.32 g, 0.78 mmol) in DMF (15 mL) was added TBTU (0. 25 g, 0.78 mmol) at 0 °C. After 5 min, the product of Example 133b (0.30 g, 0.79 mmol) and DIEA (0.55 mL, 3.12 mmol) were added. The reaction was stirred for 1 hr and then diluted with water and ethyl acetate. The layers were separated and the organic layer washed with saturated sodium bicarbonate and dried (Na2SO4). The solvent was removed to give a solid, which after chromatography (silica, 50: 50 ethyl acetate: hexanes) gave Example 133c (0.35 g, 65%) as a solid.

'H NMR (400 MHz, CD30D) : b 8.06 (d, 2 H), 7.43 (d, 2 H), 6.97 (s, 1 H), 6.86-6. 84 (m, 2 H), 6.71 (s, 1 H), 4.52 (s, 2 H), 4.45 (s, 2 H), 4.12-4. 08 (m, 1 H), 1.26 (d, 2 H); 19F NMR (371 MHz, CD30D) : S-64. 83 (s, 3 F), -82. 36 (t, 3 F),- 115.93 (q, 2 F), -128. 45 (bs, 2 F); MS-ESI (M+H) = 696.

Example 134 Example 134a: A solution of di (tert-butyl)-4- [amino (imino) methyl] benzylimidodicarbonate (7. 0 g, 17. 75 mmol) and O-ethylhydroxylamine hydrochloride (5 g, 51.26 mmol) in 140 ml of ethanol was treated with triethylamine (17.3 ml, 124 mmol) and then heated at reflux for 72 hours.

The reaction mixture was allowed to cool and concentrated in vacuo. The residue was treated with 300 ml of ethyl acetate. The organic layer was washed three times with 100 ml of water, dried over sodium sulfate, filtered and concentrated in vacuo to give 6.65 g of a yellow oil. The oil was purified by silica gel chromatography with 20-50% EA/Hex to give 3.85 g (54% yield) of a light yellow solid. m/z (M+H) +394 Example 134b: The product from Example 134a (3.75 g, 9.54 mmol) was dissolved in 4M hydrogen chloride in dioxane (20 ml, 80 mmol) and stirred for 3 hours. The mixture was diluted with 300 ml of ethyl ether and the resulting precipitate was collected by vacuum filtration. The solid was dissolved in methanol, concentrated in vacuo, and dried over phosphorous pentoxide under high vacuum to give 2.54 g (quantitative yield) of a white solid. m/z (M+H) +194 Example 134c: To free acid (0.25 g, 0.646 mmol) and the product from Example 134b (178 mg, . 775 mmol) in 3 ml of N, N-dimethylformamide was added N, N-diisopropylethylamine (0.34 ml, 1.94 mmol) and then benzotriazol-1-yl tetramethyluronium tetrafluoroborate (0.25 g, 0.775 mmol).

The solution was stirred for 20 minutes and then acidified with trifluoroacetic acid. The solution was then purified by reverse phase chromatography with 5-40% CH3CN/H2O to give 290 mg (56% yield) of a white solid. m/z (M+H) +563 Analysis: C29H3, NO, + 2.00 TFA + 1.00 H20 calcd: C, 49.01 ; H, 5.23 ; N, 13.86 ; found: C, 49.39 ; H, 5.38 ; N, 14.02.

HRMS calcd: 563.3089 ; Found: 563.3110 'H NMR (400MHz, 9: 1-CDCl3/CD30D) : 1.14 (6H, d), 1.25 (6H, d), 1.29 (3H, t), 4.09 (4H, m), 4.26 (2H, s), 4.59 (2H, s), 6.72 (1H, s), 6.75 (1H, t), 7.00 (1H, s), 7.06 (2H, d), 7.11 (1H, t), 7.48 (2H, d).

Example 135 Example 135: To the free acid (0.25 g, 0.646 mmol) and 4-aminomethyl-benzoxadiazolinone (176 mg, . 775 mmol) in 3 ml of N, N-dimethylformamide was added N, N- diisopropylethylamine (0.34 ml, 1.94 mmol) and then benzotriazol-1-yl tetramethyluronium tetrafluoroborate (0.25 g, 0.775 mmol). The solution was stirred for 1 hour and then acidified with trifluoroacetic acid (0.28 ml, 3.64).

The solution was then purified by reverse phase chromatography with 5-50% CH3CN/H2O to give 225 mg (49% yield) of a white solid m/z (M+H)+561 Analysis: C28H32N8O5 + 1. 20 TFA + 1.00 H20 calcd: C, 51.04 ; H, 4.96 ; N, 15.66 ; found: C, 51.30 ; H, 5.05 ; N, 15.75.

HRMS calcd: 561.2568 ; Found: 561.2593 1H NMR (400MHz, DMSO): 1.08 (6H, d), 1.19 (6H, d), 4.03 (2H, m), 4.30 (2H, d), 4.37 (2H, s), 6.68 (2H, s), 6.99 (1H, s), 7.12 (1H, s), 7.32 (2H, d), 7.71 (2H, d), 8.02 (1H, d), 8.60 (1H, t).

Example 136 Example 136a: A mixture of di-Boc-aminobenzyl-hydrox- amidine (1. 5 g, 17.75 mmol) and N, N-diisopropylethylamine (0.34 ml, 1.94 mmol) in 10 ml of dichloromethane was treated with isopropyl chloroformate (17.3 ml, 124 mmol) and then stirred overnight. The reaction mixture was treated with ethyl acetate and washed with brine. The organic layer was dried over sodium sulfate, filtered and concentrated in vacuo to give 1.72 g (22% yield) of an off-white solid.

1H NMR (400MHz, CDCl3): 1.26 (6H, d, 7. 0Hz), 1.43 (9H, s), 2.74 (1H, m), 4.78 (2H, s), 5.02 (2H, br s), 7.30 (2H, d, 8. 2Hz), 7.64 (2H, d, 8. 1Hz).

Example 136b: The product from Example 136a (1.72 g, 3.95 mmol) was dissolved in 4M hydrogen chloride in dioxane (20 ml, 80 mmol) and stirred for 2 hours. The mixture was diluted with 300 ml of ethyl ether and the resulting precipitate was collected by vacuum filtration. The solid was dried over phosphorous pentoxide under high vaccuum to give 1.18 g (quantitative yield) of a light pink solid. m/z (M+H) +236 Example 136c: To the free acid (0. 25 g, 0.646 mmol) and the product from Example 136a (210 mg, . 775 mmol) in 3 ml of N, N-dimethylformamide was added N, N-diisopropylethylamine (0.34 ml, 1.94 mmol) and then benzotriazol-1-yl tetramethyluronium tetrafluoroborate (0.25 g, 0.775 mmol).

The solution was stirred for 1 hour and then acidified with trifluoroacetic acid (0.28 ml, 3.64). The solution was then purified by reverse phase chromatography with 5-60% CH3CN/H2O to give 240 mg (56% yield) of a white solid. m/z (M+H) +605 Analysis: C31H40NsOs + 1.10 TFA + 1.00 H2O calcd: C, 53.30 ; H, 5.81 ; N, 14.98 ; found: C, 53.30 ; H, 5.76 ; N, 14.87.

HRMS calcd: 605.3194 ; Found: 605.3221 1H NMR (400MHz, DMSO): 1.09 (6H, d), 1. 12 (6H, d), 1.19 (6H, d), 2.70 (1H, m), 4.03 (2H, m), 4.26 (2H, d), 4.36 (2H, s), 6.67 (3H, s), 6. 99(1H, s), 7.11 (1H, s), 7.21 (2H, d), 7.60 (2H, d), 8.02 (1H, d), 8.56 (1H, t).

Example 137 Example 137: A solution of free amidine (200 mg, 0.33 mmol) and 0- (2, 3,4, 5,6-pentafluorobenzyl) hydroxylamine hydrochloride (328 mg, 1.31 mmol) in 2 ml of ethanol was treated with triethylamine (0.41 ml, 2.95 mmol) and then heated at 85°C for 72 hours in a sealed vial. The reaction mixture was allowed to cool and concentrated in vacuo. The residue was treated with 2 ml of methyl sulfoxide and methanol was added until everything dissolved. The resulting solution was acidified with 0.28 ml of trifluoroacetic acid and then purified by reverse phase chromatography with 5-90% CH3CN/H2O to give 112 mg (36% yield) of a light yellow solid. m/z (M+H) +698 Analysis: C3lH27N703 + 2.10 TFA calcd: C, 45.12 ; H, 3.13 ; N, 10.46 ; found: C, 45.02 ; H, 3.17 ; N, 10.44.

HRMS calcd: 698.2120 ; Found: 698.2111 1H NMR (400MHz, DMSO): 1.23 (6H, d), 4.07 (1H, m), 4.26 (2H, d), 4.33 (2H, s), 5.07 (2H, s), 6.75 (1H, s), 6.77 (1H, s), 6.77 (1H, s), 6. 92 (1H, s), 7.17 (2H, d), 7.53 (2H, d), 8.59 (1H, t).

Example 138 Example 138: A solution of free amidine (150 mg, 0.246 mmol) and 0- (4-nitrobenzyl) hydroxylamine hydrochloride (201 mg, 0.984 mmol) in 2 ml of ethanol was treated with N, N- diisopropylethylamine (0.43 ml, 2.46 mmol) and then heated at 85°C for 66 hours in a sealed vial. The reaction mixture was allowed to cool and concentrated in vacuo. The residue was dissolved with methyl sulfoxide and acidified with 0.21 ml of trifluoroacetic acid. The solution was then purified by reverse phase chromatography with 10-80% CH3CN/H2O to give 106 mg (56% yield) of a yellow solid. m/z (M+H) +653 Analysis: C3lH3, NO, + 2.00 TFA + calcd: C, 47.73 ; H, 3.78 ; N, 12.72 ; found: C, 47.91 ; H, 3.82 ; N, 12. 90.

HRMS calcd: 653.2442 ; Found: 653.2445 1H NMR (400MHz, DMSO): 1.22 (6H, d), 4.07 (1H, m), 4.26 (2H, d), 4. 33 (2H, s), 5.14 (2H, s), 6.74 (1H, s), 6.76 (1H, s), 6.77 (1H, s), 6.92 (1H, s), 7.18 (2H, d), 7.55 (2H, d), 7.67 (2H, d), 8.21 (2H, d), 8.60 (1H, t).

Example 139 Example 139: A solution of free amidine (200 mg, 0.328 mmol) and 1-[(ammoniooxy) methyl]-4-methoxybenzene chloride (248 mg, 1.31 mmol) in 2 ml of ethanol was treated with N, N- diisopropylethyl amine (0. 57 ml, 3.28 mmol) and then heated at 85°C for 20 hours in a sealed vial. The reaction mixture was allowed to cool and concentrated in vacuo. The residue was dissolved with methyl sulfoxide and acidified with 0.28 ml of trifluoroacetic acid. The solution was then purified by reverse phase chromatography with 10-80% CH3CN/H2O to give 128 mg (44% yield) of a white solid. m/z (M+H) +638 Analysis: C32H34N704 + 2. 00 TFA + 0. 65 H2O calcd: C, 49.28 ; H, 4.28 ; N, 11.17 ; found: C, 49.29 ; H, 4.32 ; N, 11.18.

HRMS calcd: 638.2697 ; Found: 638.2688 1H NMR (400MHz, DMSO): 1.22 (6H, d), 3.74 (3H, s), 4.08 (1H, m), 4.29 (2H, d), 4.34 (2H, s), 4.94 (2H, s), 6.74 (1H, s), 6.77 (1H, s), 6.79 (1H, s), 6.92 (2H, d), 6.93 (1H, s), 7.25 (2H, d),'7. 38 (2H, d), 7.57 (2H, d), 8.64 (1H, t).

Example 140 Example 140: A solution of free amidine (200 mg, 0.328 mmol) and 1-[(ammoniooxy) methyl]-3- (trifluoromethyl) benzene chloride (299 mg, 1.31 mmol) in 2 ml of ethanol was treated with N, N-diisopropylethyl amine (0.57 ml, 3.28 mmol) and then heated at 85°C for 44 hours in a sealed vial. The reaction mixture was allowed to cool and concentrated in vacuo. The residue was dissolved with methyl sulfoxide and acidified with 0.28 ml of trifluoroacetic acid. The solution was then purified by reverse phase chromatography with 30-90% CH3CN/H2O to give 141 mg (49% yeild) of a white solid. m/z (M+H) +676 Analysis: C32H3lN7Os + 1. 80 TFA calcd: C, 48.54 ; H, 3.75 ; N, 11.13 ; found : C, 48.54 ; H, 3.83 ; N, 11.07.

HRMS calcd: 676.2465 ; Found: 676.2468 1H NMR (400MHz, DMSO): 1.22 (6H, d), 4.08 (1H, m), 4.27 (2H, d), 4.33 (2H, s), 5.10 (2H, s), 6.73 (1H, s), 6.77 (1H, s), 6. 78 (1H, s), 6.92 (1H, s), 7.20 (2H, d), 7.20-7. 77 (4H, m), 8.60 (1H, t).

Example 141 Example 141: A solution of free amidine (200 mg, 0.328 mmol) and O-allylhydroxylamine hydrochloride (144 mg, 1.31 mmol) in 2 ml of ethanol was treated with N, N- diisopropylethyl amine (0. 57 ml, 3.28 mmol) and then heated at 85°C for 37 hours in a sealed vial. The reaction mixture was allowed to cool and was treated with 0.28 ml of trifluoroacetic acid. The solution was then purified by reverse phase chromatography with 20-50% CH3CN/H2O to give 104 mg (41% yield) of a white solid. m/z (M+H) +558 Analysis: C2H30N703 + 1.80 TFA + 0.50 H20 calcd: C, 47.62 ; H, 4.28 ; N, 12.70 ; found: C, 47.62 ; H, 4.29 ; N, 12.75.

HRMS calcd: 558.2435 ; Found: 558.2423 'H NMR (400MHz, DMSO): 1.22 (6H, d), 4.07 (1H, m), 4.29 (2H, d), 4.34 (2H, s), 4.48 (2H, d), 5.23 (1H, d), 5.36 (1H, d), 6.02 (1H, m), 6.73 (1H, s), 6.77 (1H, s), 6.79 (1H, s), 6.92 (1H, s), 7.26 (2H, d), 7.59 (2H, d), 8.63 (1H, t).

Example 142 Example 142: To free acid (150 mg, 0.369 mmol) and 4- aminomethyl-benzoxadiazolinone (101 mg, 0.442 mmol) in 2 ml of N, N-dimethylformamide was added N, N-diisopropylethylamine (0.32 ml, 1.84 mmol) and then benzotriazol-1-yl tetramethyluronium tetrafluoroborate (141 mg, 0.442 mmol).

The solution was stirred for 1 hour, acidified with trifluoroacetic acid and purified by reverse phase chromatography with 5-70% CH3CN/H2O to give 35 mg (14% yield) of a light yellow solid. m/z (M+H) +544 Analysis: C25H24N7O4 + 1. 00 TFA calcd: C, 49.32 ; H, 3.83 ; N, 14.91 ; found: C, 49.46 ; H, 4.06 ; N, 14.67.

HRMS calcd: 544.1915 ; Found: 544.1914 'H NMR (400MHz, DMSO): 1. 19 (6H, d), 4.05 (1H, m), 4.31 (2H, d), 4.34 (2H, s), 6.69 (1H, s), 6.74 (1H, s), 6.76 (1H, s), 6.72 (1H, s), 7.33 (2H, d), 7.71 (2H, d), 8.65 (1H, t).

Example 143 4-fluoro-3-methoxybenzylamine Example 143a: To 4-fluoro-3-methoxybenzonitrile (2.55 g, 16.9 mmol) in 75 ml of ethanol was added 0.85 g of 10% palladium on carbon and 7.5 ml of hydrogen chloride (conc.). The mixture was shaken on the Parr apparatus under 20 Psi of hydrogen for 5.5 hours. The mixture was filtered and concentrated in vacuo to give 3.19 g (99% yield) of a light pink solid. m/z (M+H) +156 5- (aminomethyl)-2-fluorophenol Example 143b: The product from Example 143a (3.07 g, 16.1 mmol) in 9 ml of hydrogen chloride (conc.) was heated at 125°C for 8 hours in a sealed tube. The solution was treated with 75 ml of ethanol and concentrated in vacuo to give 2.88 g (quantitative yield) of a tan solid. m/z (M+H) +142 Example 143c: To free acid (2.5 g, 3.90 mmol) in 15 ml of N, N-dimethylformamide was added N, N- diisopropylethylamine (5.4 ml, 31.2 mmol), 1- [3- (dimethylamino) propyl]-3-ethylcarbodiimide hydrochloride (0.82 g, 4.29 mmol), the product from Example 143b (0.76 g, 4.29 mmol) and the solution was stirred over the weekend.

The solution was added to a solution of 40 ml of 1M HCl and 210 ml of water. The solution was neutralized with N, N- diisopropylethylamine and the precipitate was collected by vacuum filtration. The solid was purified by silica gel chromatography with 2-5% CH3OH/CH2Cl2 to give 0.87 g (% yield) of an orange solid. m/z (M+H) 765 Example 146 N- {4- [ (Z)-amino (hydroxyimino) methyl]-3-fluorobenzyl}-2-[6- [3-amino-5-(trifluoromethyl) phenyl]-3-(isopropylamino)-2- oxopyrazin-1 (2H)-yl] acetamide Example 146a: To a 250mL RBF was added the di-Boc-4- amino-2-fluoro-benzonitrile (5.4g, 21.4mmol) in 4 N HCl in dioxane (15mL). The reaction stirred at room temperature for 1 hour. Checked by L. C. and M. S. , the starting material was consumed and a new product that had a mass that corresponded to the product was observed. The excess HCl and dioxane was removed in vacuo to afford the HCl salt of the desired product. The resulting white solid was used with no further purification.

M. S. 151. 01 (MH+152. 2) 2- [6- [3-amino-5- (trifluoromethyl) phenyl]-3- (isopropylamino)- 2-oxopyrazin-1 (2H)-yl]-N- (4-cyano-3-fluorobenzyl) acetamide Example 146b: To a 250mL RBF was added the amine (4. 0g, 21. 4mmol) and the free acid (4. 0g, 8. 26mmol) in DMF (50mL).

To the reaction was added DIEA (8mL). The reaction stirred for 15 minutes then TBTU (2.89g, 9. Ommol) was added. The reaction was stirred at room temperature overnight. The reaction was then poured into water (500mL) and extracted with ethyl acetate (200mL). The ethylacetate was washed again with 10% KHS04 then dried over MgS04. The organics were then concentrated in vacuo to afford Example 146b in 73% yield.

Example 146c: To a 25mL RBF was added Example 146b (1.3g, 2.59mmol) triethylamine (ImL) and hydroxylamine hydrochloride (0. 191g, 2.75mmol). The reaction was refluxed in ethanol (lOmL) overnight. The resulting solution was diluted to 50 mL with water and methanol. The reaction was purified using reverse phase chromatography to afford the title compound (1.21g) as a TFA salt in 87% yield.

NMR (400MHZ, CDCL3): 1H 1.4 ppm (3H, d), 3.34 ppm (1H, m), 4.11 ppm (lH, q), 4.5 ppm (2H, d), 4.51 ppm (1H, s), 6.72 ppm (1H, s), 6.91 ppm (2H, m), 7. 08 ppm (1H, s), 7.29 ppm (1H, d), 7.31 ppm (1H, s), 7.6 ppm (2H, m).

Found C: 44.30 H: 3.71 N: 13.09 Calc. C: 53.83 H: 4.71 N: 18.31 Example 147 Example 147a : The product of Example 19d (300mg, 0. 56mmol) in AcOH (5ml) was added Pd/C (lOOmg). The mixture was set on hydrogenation shake at 40psi for lOhr, then filtered and concentrated to yield 300mg of solid (99%).

Example 147b: 0.3g, 0.58mmol of Example 147a and benzyl chloridocarbonate (0. 13g, 0. 75mmol) in THF (2ml) was added NMM (75mg, 0. 75mmol). The mixture was kept stirring for 3hr. The mixture was concentrated and then TFA/CH2Cl2 was added. The mixture was kept stirring at RT for lhr, then concentrated and purified on RP-HPLC to yield 85mg of solid (13%).

HRMS calcd for C35H40N8O5 (M+H) : 653.3194. Found: 653.3221.

Anal. Calcd for C3SH40N805 + 1.95TFA+1. 2H20: C: 52.10 ; H: 4.98 ; N: 12.49.

Found: C: 52.11 ; H: 4.98 ; N: 12.45.

'H NMR (DMSO-d6, 300 MHz) 8 1.10 (d, 6H), 1.24 (d, 6H), 4.11 (m, 2H), 4.39 (d, 2H), 4.46 (s, 2H), 5.36 (s, 2H), 6.32 (s, 1H), 6.68 (s, 1H), 6.82 (s, 1H), 7.12 (s, 1H), 7.41-7. 51 (m, 6H), 7.79 (d, 2H), 7.93 (t, 1H), 8.70 (t, 1H), 9.74 (s, 1H).

Example 148 Example 148: The product of Example 19d (300mg, 0.47mmol) in AcOH (2ml) and 2,2-dimethoxypropane (2ml) was heated to 70°C for 3hr. The mixture was concentrated and then TFA/CH2C12 (2ml/lml) was added. The mixture was kept stirring at RT for lhr, then concentrated and purified on RP-HPLC to yield 100mg of solid (27%).

HRMS calcd for C30H38N8O4 (M+H): 575.3089. Found: 575.3061.

Anal. Calcd for C30H38N804 + 1.6TFA+1. G5H20 : C: 51.32 ; H: 5.38 ; N: 14.51.

Found: C: 51.38 ; H: 5.41 ; N: 14.43.

'-H NMR (DMSO-d6, 300 MHz) 5 1.10 (d, 6H), 1.27 (d, 6H), 1.47 (s, 6H), 2.62 (m, 1H), 4.12 (m, 3H), 4.35 (d, 2H), 4.44 (s, 2H), 6.40 (s, 1H), 6.70 (s, 1H), 6.93 (s, 1H), 7.22 (s, 1H), 7.30 (d, 2H), 7.40 (bs, 1H), 7.62 (d, 2H), 8.61 (t, 1H), 9.82 (s, 1H).

Example 149 Example 149: 0.5 g (1.1 mmol) N, N-di-Boc-4-amino- (benzoyl) benzamidine was deprotected in 25 mL CH2C12/TFA (4: 1) for 30 minutes and the solvent was evaporated thoroughly to dryness. 0.48 g (1 mmol) of the free amidine was coupled with the 4-amino- (benzoyl) benzamidine in 25 mL DMF in the presence of 0.35 g (1. 1 mmol) TBTU and 0.525 mL (3 mmol) DIPEA with stirring for 2 hours. DMF was evaporated and the product was precipitated by addition of 200 mL water and filtered. The crude product was dissolved in the mixture of AcN and H20 and purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the product at 45% AcN, 0. 365 g (51%) as a white solid.

Mu+ =606. 2 lHNMR : 400 MHz, CD30D : 8.08-8. 02 (d, 1H), 7.96-7. 84 (m, 3H), 7.80-7. 72 (m, 1H), 7.66-7. 50 (m, 4H), 7.40-7. 34 (d, 1H), 7.05-6. 80 (m, 3H), 4.58-4. 49 (m, 4H), 4.14-4. 00 (m, 1H) and 1.40-1. 30 (m, 6H). l9FNMR : 400 MHz, CD30D : -64.9 (s, 3F) Elemental analysis: C31H30N7O3F3 + 1. 5xTFA + 2xH20 Found C: 50.20 H: 4.41 N: 11.59 Calc. C: 50.25 H: 4.40 N: 12.06 Example 150 Example 150a: 3.65 g (10 mmol) N, N-di-Boc-4-amino- benzamidoxime was dissolved in 11 mL IN NaOH and cooled in ice bath. 1.32 g (10.5 mmol) dimethyl sulphate was added slowly and the mixture was stirred for 4 hours in ice bath.

The solvent was evaporated and the product was isolated on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding 1.3 g (34%) product at 50% AcN, as an oil. MH+=380. 6 Example 150b: 0.42 g (1.1 mmol) N, N-di-Boc-4-amino-O- methyl-benzamidoxime was deprotected in 25 mL CH2Cl2/TFA (4: 1) for 30 minutes and the solvent was evaporated thoroughly to dryness. 0.48 g (1 mmol) of the free acid was coupled with the 4-amino-O-methyl-benzamidoxime in 25 mL DMF in the presence of 0.35 g (1.1 mmol) TBTU and 0.7 mL (4 mmol) DIPEA with stirring for 16 hours. DMF was evaporated and the product was precipitated by addition of 200 mL water and filtered. The crude product was dissolved in the mixture of AcN and H20 and purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the title product at 40% AcN, 0.13 g (17%) as a white solid.

MHf =532. 3 1HNMR : 400 MHz, CD30D : 7.70-7. 64 (d, 2H), 7.46-7. 38 (d, 2H), 7.02 (s, 1H), 6.90-6. 84 (d, 2H), 6.68 (s, 1H), 4.54 (s, 2H), 4.42 (s, 2H), 4.14-4. 00 (m, 1H), 3.32-3. 28 (m, 3H) and 1. 40-1.32 (m, 6H).

19FNMR : 400 MHz, CD30D : -65.0 (s, 3F) Elemental analysis : C2sH28N7°3F3 + 1. 5xTFA + 2. 1xH2O Found C: 45.41 H: 4.24 N: 12.92 Calc. C: 45.42 H: 4.59 N: 13.24 Example 151 Example 151: 0.51 g (1.3 mmol) N, N-di-Boc-4-amino-0- ethyl-benzamidoxime was deprotected in 25 mL CH2C12/TFA (4: 1) for 30 minutes and the solvent was evaporated thoroughly to dryness. 0.58 g (1.3 mmol) of the free acid was coupled with the 4-amino-O-ethyl-benzamidoxime in 25 mL DMF in the presence of 0.48 g (1.5 mmol) TBTU and 0.7 mL (4 mmol) DIPEA with stirring for 16 hours. DMF was evaporated and the crude product was dissolved in the mixture of AcN and H20 and purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes), yielding the title product at 42% AcN, 0.39 g (50%) as a white hygroscopic solid.

MH =546. 4 lHNMR : 400 MHz, CD30D : 7.70-7. 64 (d, 2H), 7.48-7. 42 (d, 2H), 7.02 (s, 1H), 6.90-6. 84 (d, 2H), 6.68 (s, 1H), 4.56 (s, 2H), 4.49 (s, 2H), 4.20-4. 10 (m, 2H), 4.09-4. 00 (m, 1H) and 1.43-1. 34 (m, 9H).

19FNMR : 400 MHz, CD ; OD : -64.8 (s, 3F) Elemental analysis : C26H3oN703F3 + 2xTFA + 1. 8xH20 Found C: 44.73 H: 4.23 N: 12.06 Calc. C: 44.70 H: 4.45 N: 12.16 Example 152 Example 152: 0.31 g (0.65 mmol) nitrile compound was dissolved in 25 mL EtOH and it was refluxed in the presence of 0.14 g (2 mmol) hydroxylamine. HCl and 0.7 mL (4 mmol) DIPEA for 3hours. The solvent was evaporated and the product was purified on preparative HPLC using a gradient of acetonitrile (10-50% AcN in 30 minutes). Yield: 0.22 g (46%) as a white solid.

MH+-508. 4 1HNMR : 400 MHz, CD30D : 7.66-7. 60 (d, 2H), 7.48-7. 37 (m, 3H), 7.30 (s, 1H), 6.90-6. 86 (t, 1H), 6.64 (s, 1H), 4.58 (s, 2H), 4.42 (s, 2H), 4.10-4. 00 (m, 1H), 3.86 (s, 3H) and 1.40- 1.34 (m, 6H).

Elemental analysis : C25H2. 9N705 +1. 5xTFA + 1. 2H20 Found C: 48.19 H: 4.70 N: 13.95 Calc. C: 48.03 H: 4.74 N: 14.00 Example 153 Example 153: 0.33 g (0.45 mmol) of methyl ester of Example 152 was dissolved in 15 mL MeOH and hydrolyzed by adding 1.5 mL 1N LiOH. After 10 minutes stirring 3 mL AcOH was added and the mixture was purified on preparative HPLC using a gradient of acetonitrile (0-40% AcN in 30 minutes).

Product peak was collected at 19 % AcN, yielding 0.22 g (69%) as a white solid.

MH+ =494. 3 and MNa+=516. 2 HNMR : 400 MHz, CD30D : 7.52 (s, 1H), 7.51-7. 44 (d, 2H), 7.36 (s, 1H), 7.16-7. 10 (d, 2H), 7.08 (s, 1H), 6.60 (s, 1H), 4.58 (s, 2H), 4.22 (s, 2H), 3.95-3. 84 (m, 1H) and 1.30-1. 21 (m, 6H).

Elemental analysis : C24H2, N7Os + 2.8xTFA +1. 5xH2O Found C: 42.30 H: 4.00 N: 11.80 Calc. C: 42.33 H: 3.94 N: 11.67 Example 155a: To a 250mL RBF was added NaH (0. 54g, 14mmol, 60% in mineral oil) in THF (25mL). The reaction was cooled to 0 C. To the slurry was added the oxime (5g, 13.7mmol). The reaction stirred for 1 hour at 0 C. To the reaction was added the (-)-menthyl chloroformate (2.99g, 13.7 mmol). The reaction stirred 4 hours as it warmed to room temperature. To the reaction was quenched with water and the organics were extracted with ethyl acetate (lOOmL). The combined organics were then dried over MgS04 and concentrated in vacuo. The resulting oil was purified on silica to afford Example 155a (3.8g) in 50% yield.

M. S. 547.68 (MH+548. 7) 4-(aminomethyl)-N'-E ({[(2S, 5R)-2-tert-butyl-5- methylcyclohexyl] oxy} carbonyl) oxy] benzenecarboximidamide Example 155b: To a 250mL RBF was added Ex-10a (1. 8, 3. 29mmol) in 4 N HCl/dioxane (20mL). The reaction stirred for 2 hours and was complete by L. C. and M. S.. The excess HC1 and dioxane was remove in vacuo to afford Example 155b as an HC1 salt and a white powder. The product was used with no further purification.

M. S. 285.43 (MH+286. 5) Example 155c : To a 250mL RBF was added Example 155b (1.38g, 3. 29mmol) was added the acid (1, 3g, 2. 7mmol), and DIEA (8mL) in DMF (30mL). To the solution was added TBTU (1.3g, 4.11 mmol) The reaction stirred over night. To the reaction was added 10% KHS04 (lOOmL) and ethyl acetate (200mL). The organics were collected and washed with brine then dried over MgS04. The organics were then concentrated in vacuo and the resulting oil was purified on silica to afford Ex-10 (1.3g) in 69% yield.

NMR (400MHZ, CDCL3): 1H 0.85 ppm (3H, d), 0.98 ppm (6H, t), 1.12 ppm (2H, m), 1.2 ppm (6H, d), 1.38 ppm (lH, m), 1.45 ppm (lH, m), 1.63 ppm (2H, d), 2.0 ppm (1H, s), 3.30 ppm (1H, s), 4.0 ppm (1H, m), 4. 15 ppm (1H, m), 4. 26 ppm (2H, d), 4.31 ppm (2H, s), 4.55 ppm (1H, dt) ), 5.8 ppm (2H, bs), 6.69 ppm (1H, s), 6.80 ppm (4H, d), 6.85 ppm (2H, m), 7.21 ppm (2H, d), 7.62 ppm (2H, d), 8.6 ppm (1H, t).

Example 156 <BR> <BR> <BR> N- {4- [ (Z)-amino ( { [ (benzyloxy) carbonyl] oxy} imino)<BR> <BR> <BR> <BR> <BR> methyl] benzyl}-2- [6- [3-amino-5- (trifluoromethyl) phenyl]-3-<BR> <BR> <BR> <BR> <BR> (isopropylamino)-2-oxopyrazin-1 (2H)-yl] acetamide di (tert-butyl) 4- [ (E) -amino ({[(benzyloxy) carbonylAoxy} imino) methyl] benzylimidodicarbonate Example 156a: To a 250mL RBF was added NaH (0. 54g, 14mmol, 60% in mineral oil) in THF (25mL). The reaction was cooled to 0 C. To the slurry was added the oxime (5g, 13.7mmol). The reaction stirred for 1 hour at 0 C. To the reaction was added the Cbz-OSu (3.4g, 13.7 mmol).

The reaction stirred 4 hours as it warmed to room temperature. To the reaction was quenched with water and the organics were extracted with ethyl acetate (lOOmL). The combined organics were then dried over MgS04 and concentrated in vacuo. The resulting oil was purified on silica to afford Ex-15a (4. 81g) in 70% yield.

M. S. 499.56 (MH+500.8) 4-(aminomethyl)-N'-([(benzyloxy) carbonyl] oxy} benzenecarboximidamide Example 156b: To a 250mL RBF was added Example 156a (1.17g, 2. 34mmol) in 4 N HCl/dioxane (lOmL). The reaction stirred for 2 hours and was complete by L. C. and M. S. The excess HCl and dioxane was removed in vacuo to afford Example 156b as an HCl salt and a white powder. The product was used with no further purification.

M. S. 299.45 (MH+300.2) Example 156c: To the 250mL flask from Example 156b was added the acid (1. 07g, 2.2mmol), and DIEA (8mL) in DMF (50mL).

To the solution was added TBTU (1.3g, 4.11 mmol) The reaction stirred over night. To the reaction was added 10% KHS04 (lOOmL) and ethylacetate (200mL). The organics were collected and washed with brine then dried over MgS04. The organics were then concentrated in vacuo and the resulting oil was purified on silica to afford Ex-15 (0.75g) in 52% yield.

M. S. 651.65 (MH+652.6) NMR (400MHZ, CDCL3): 1H 1.19 (6H, d), 4.08 ppm (1H, q), 4.28 ppm (2H, d), 4.35 ppm (2H, s), 6.68 ppm (1H, s), 6.79 ppm (4H, m), 6.9 ppm (1H, s), 7.22 ppm (2H, d), 7.4 ppm (6H, m), 7.60 ppm (2H, d), 8.61 ppm (1H, t).

Example 157 2, 5-dibromo-1, 3-difluorobenzene Example 157a: To a solution of 4-Bromo-2,6- difluoraniline (100. 0 g, 0. 48 mol) in CL, CON (600 ml) was added CuBr2 (214.0 g, 0. 95 mol). The resulting mixture was cooled to 5° C and t-butylnitrite (99.0 g, 0.99 mol) was added dropwise over 20 min. The reaction was stirred for an additional 2 hours at room temperature then the entire mixture was partitioned between a mixture of CHCl3 (1.5 L) and 2N HC1 (1.0 L). The layers were separated and the aqueous was extracted again with CHC13. The chloroform layers were combined, dried over Na2SO4, filtered and concentrated to give 96.0 g of Example 157a (73 %) as a white solid.

MS (EI, 70ev): m/z 272 (M+, 100), 191 (40), 112 (80); Calcd for C6HzBr2F2 = 271. 88 2, 6-difluoroterephthalonitrile 'Example 157b: To a solution of Example 157a, 2,5- dibrom-1, 3-difluorobenzene (49.0 g, 180 mmol) in DMF (500 ml), was added Cu (I) CN (48.0 g, 0.54 mol). The reaction was stirred at 185°C for 2 hours. The reaction mixture was cooled to room temperature and filtered. The filtrate was concentrated and the crude residue was purified by flash chromatography (Merck 230-400 mesh Si02, chloroform: hexane; 8: 2) to afford 19.0 g of Example 157b (64%) as light yellow solid.

MS (EI, 70ev): m/z 164 (M+, 100), 137 (12), 113 (01) ; Calcd for CgHF = 164.0 tert-butyl 4-cyano-3, 5-difluorobenzylcarbamate Example 157c: To a solution of Example 157b, 2,6- difluoro-terephthalonitrile, (18.87 g, 115 mmol) in 95% Ethanol (200 ml), was added PtO2 (2.0 g, 10% by w/w) followed by di-tert-butyl-pyrocarbonate (27.59 g, 126 mmol). The mixture was stirred under 60 psi of hydrogen at room temperature for 16 hours. The catalyst was removed by filtration through Celite. The filtrate was concentrated and the crude residue was purified by flash chromatography (Merck 230-400 mesh SiO2, Hexane: Ethyl acetate; 8: 2) to give 15.0 g of Example 157c as white solid.

HRMS 269.1069 found for Cl3Hl4F2N202 ; 269.1096 calc'd.

'H NMR, 300 MHz, DMSO-d6 5 7.55 (bt, 1H), 7.28 (s, 1H), 7.22 (s, 1H), 4.24 (d, J = 6.0 Hz, 2H), 1.39 (s, 9H).

6- (aminomethyl)-4-fluoro-1, 2-benzisoxazol-3-amine Example 157d: A solution of potassium tert-butoxide (1.08 g, 9.7 mmol) and acetoxime (707 mg, 9.7 mmol) in dry tetrahydrofuran (40 ml) was stirred at room temperature for 30 min. To this solution was added a solution of Example 157c, tert-butyl 4-cyano-3,5-difluorobenzylcarbamate (2.36 g, 8.8 mmol) in dry tetrahydrofuran (20 ml). The resulting reaction mixture was stirred at room temperature for 3 hours. The reaction was concentrated and partitioned between ethyl acetate (250 ml) and saturated aqueous ammonium chloride (150 ml). The ethyl acetate layer was separated and dried over magnesium sulfate. The solids were removed by filtration and the filtrate was concentrated. The residue was treated with 95% ethanol (40 ml), water (35 ml) and conc. HC1 (20 ml) and this mixture was heated at 80° C for 3 hours. The reaction mixture was concentrated and the pH was adjusted to-9 with 4 N sodium hydroxide. The solids obtained were extracted with ethyl acetate. The ethyl acetate layer was dried with magnesium sulfate, filtered and the filtrate concentrated to give 840 mg of Example 157d (53 %) as a tan solid.

MS (EI, 70ev): m/z 181 (M+, 100), 161 (85), 153 (37), 83 (37) Calcd for CeH8FN3O = 181.17 H NMR, 400 MHz, DMSO-d6 8 7.28 (s, 2H), 7.05 (s, 1H), 7.03 (s, 1H), 6.22 (s, 2H), 3.82 (s, 2H).

Example 157e: The carboxylic acid, [6- [3-amino-5- (trifluoromethyl) phenyl]-3- (isopropylamino)-2-oxopyrazin- 1 (2H)-yl] acetic acid, (890 mg, 2 mmol), the benzyl amine, 6- (aminomethyl-4-fluoro-1, 2-benzisoxazol-3-amine, Example 157d (400 mg, 2.2 mmol) and HOBT-H20 (2.7 g, 20 mmol) were placed in a flask. DMF (10 ml) and CH2Cl2 (40 ml) were added. To this stirred solution was added polymeric DCC resin (8.28 g, loading 1.38 mmol/g, 14 mmol) and triethylamine (1.39 ml) and the resulting mixture stirred over night. The resin was removed by filtration. The filtrate was concentrated and the residue was purified by prep HPLC (RP, 10-90% gradient, acetonitrile in 0.1 % TFA) to give 380 mg of Example 157e as light yellow solid.

LCMS (5-95% acetonitrile in 0.1% TFA over 14 min): Retention time = 4.15 min; (M+H) + =534 H-NMR, 400 MHz, DMSO-d6 6 8.71 (t, J=5.6 Hz, 1H), 7.14 (s, 1H), 6.90 (s, 1H), 6.78 (s 1H), 6.70 (s, 1H), 6.27 (s, 1H), 5.79 (s, 1H), 4.38 (d, J 6.0 Hz, 2H), 4.36 (s, 1H), 4.07 (m, 1H) 1.20 (d, J = 7.3 Hz, 6H).

Example 158 Example 158: The carboxylic acid, [3- (isopropylamino)- <BR> <BR> <BR> 6- [3- ( { [ (lS)-l-methylpropyl] amino} carbonyl)-5-aminophenyl]- 2-oxopyrazin-1 (2H)-yl] acetic acid (tan solid, M + H = 475) (400 mg, 0.84 mmol), the benzyl amine, 6- (aminomethyl)-4- fluor-1, 2-benzisoxazol-3-amine, Example 157d (236 mg, 0.93 mmol) and HOBt-H20 (153 mg, 1.00 mmol) were dissolved in DMF (16 mL) and CH2C12 (100 mL). To this gently stirred solution was added polymeric DCC resin (4.00 g, loading 1.38 mmol/g, 5.52 mmol) and triethylamine (0.5 mL) and the resulting mixture stirred over night. The resin was removed by filtration. The filtrate was concentrated and the residue was purified by prep HPLC (RP, acetonitrile gradient in 0. 1% TFA). Co-evaporation with 1N HCl afforded 120 mg of Example 158 (22%) as a white solid.

LCMS (RP, 15-50% gradient acetonitrile in 0. 1% ammonium acetate over 14 min): retention time = 5.72 ; (M+H) + = 565.

Example 159 2, 3-difluoro-4-methylbenzamide Example 159a: To a solution of NH40H (350 mL) and toluene (450 mL) at 0°C was added 2,3-difluoro-4- methylbenzoyl chloride (35 g, 184 mmol). The reaction mixture stirred for 16 hours at ambient temperature. The precipitate was filtered and dried to give Example 159a as a white solid.

LCMS (RP, 15-90% gradient acetonitrile in 0.1% ammonium acetate): retention time = 3.43 ; (M+H) + = 172 'H NMR, 300 MHz, DMSO-d6 5 7.62-7. 78 (broad m, 2 H), 7.36- 7.30 (m, 1H), 7.17-7. 11 (m, 1H), 2.29 (d, J = 2.10-long range F-coupling, 3H).

2, 3-difluoro-4-methylbenzonitrile Example 159b: To 2,3-difluoro-4-methylbenzamide, Example 159a (28.9g, 169 mmol) in CH2Cl2 (1 L) and TEA (47.1 mL, 338 mmol) at 0°C was added triflic anhydride (45.4 mL, 338 mmol) dropwise. The reaction was allowed to reach ambient temperature overnight. The mixture was quenched with brine and H20 (1 L each), the organic layer was separated followed by extraction of the aqueous layer with CH2Cl2 (3 X 1 L). The organic layers were combined, dried over MgSO4, filtered and concentrated. The mixture was filtered through silica gel with 10: 1 hexane/ethyl acetate.

The product which eluted first, was collected and concentrated to give Ex-23b. LCMS (RP, 15-90% acetonitrile gradient in 0. 1% ammonium acetate over 14 min): retention time = 6.43 min; (M+MeOH+H) 186.

4- (bromomethyl)-2, 3-difluorobenzonitrile Example 159c: To 2, 3-difluoro-4-methylbenzonitri. le, Example 159b (3.23 g, 21.1 mmol) in CC14 (75 mL) was added benzoyl peroxide (1.05 g, 4.22 mmol) and N-bromosuccinimide (4.55 g, 25.3 mmol) and the resulting mixture was heated to reflux for 8 hours. The reaction was allowed to cool, diluted with CH2Cl2 (75 mL), washed with H20 and brine (75 mL each). The organic layer was separated and dried over MgS04, filtered and concentrated. The crude material was purified by flash chromatography (Merck 230-400 mesh SiO2, 80: 1 hexane/ethyl acetate) to give Example 159c as a white solid.

LCMS (RP, 15-90% acetonitrile gradient in 0.1% ammonium acetate over 14 min): retention time = 6.83 min; (M+H) + 232 lH-NMR, 300 MHz, CDC13 8 7.42-7. 27 (m, 2H), 4.49 (d, J = 1.2 Hz-'long range F-coupling, 2H). di (tert-butyl) 4-cyano-2,3-difluorobenzylimidodicarbonate Example 159d: To a solution of NaH (1.09 g, 27.2 mmol) and di-tert-butyliminodicarboxylate in THF (50 mL) was added 4- (bromomethyl)-2, 3-difluorobenzonitrile, Example 159c (5.73g, 24.7 mmol) in THF (50 mL). The reaction was stirred at ambient temperature for 16 hours and concentrated. The residue was taken up in ether (100 mL) and washed with H20 and brine (100 mL each). The organic layer was dried over MgSO4, filtered and concentrated. The material was purified by flash chromatography (Merck 230-400 mesh SiO2, 100: 1 CHCl3/MeOH) to give Example 159d as a white solid.

LCMS (RP, 15-90% acetonitrile gradient in 0.1% ammonium acetate over 14 min): retention time = 9.19 min; negative ion mode (M-H)-= 367 H-NMR, 300 MHz, CDC13 8 7.37-7. 32 (m, 1H), 7.13-7. 08 (m, 1H) 4.89 (s, 2H), 1.46 (s, 18H).

19F-NMR, 282 MHz, CDC13 5-131. 40 (m, 1F),-140. 09 (m, 1F). di (tert-butyl) (3-amino-7-fluoro-1, 2-benzisoxazol -6-yl) methylimidodicarbonate Example 159e: A solution of acetohydroxamic acid (2. 46 g, 32.8 mmol) and Potassium tert-butoxide (3.87 g, 32.8 mmol) in DMF (150 mL) was stirred at ambient temperature for 0.5. To this mixture was added di (tert-butyl) 4-cyano-2,3- difluorobenzylcarbamate, Example 159d, in DMF (20 mL) and the reaction was stirred for 16 hours at room temperature.

The mixture was diluted with brine (20 mL) and ethyl acetate (20 mL). The organic layer was separated and the aqueous layer extracted with ethyl acetate (3 X 20 mL). The organic layers were combined dried over magnesium sulfate, filtered and concentrated to give Example 159e.

LCMS (RP, 15-90% acetonitrile gradient in 0.1% ammonium acetate over 14 min): retention time = 8.24 ; (M+H) + = 382 HRMS (M+Na) + 404. 1594 found for C18H24FN30sNa ; 404.1592 calc'd.

6- (aminomethyl)-7-fluoro-1, 2-benzisoxazol-3-amine dihydrochloride Example 159f: A solution of di (tert-butyl) 4-cyano-2,3 difluorobenzylimidodicarbonate, Example 159e, and 4 N HCl in dioxane was stirred at room temperature for 16 hours. The reaction was concentrated to give Ex-23f as a white solid.

LCMS (RP, 5-90% acetonitrile gradient in 0. 1% TFA over 14 min): retention time = 1.14 min; (M+H) 182. HRMS (M+H) +=82. 0734 found for C8HgFN30 ; 182.0724 calc'd.

Example 159g: The carboxylic acid, [3-amino-5- (trifluoromethyl) phenyl]-3- (isopropylamino)-2-oxopyrazin- 1 (2H)-yl] acetic acid, (461 mg, 1.00 mmol) and HOBt-H20 (153 mg, 1.00 mmol) were placed in a flask. DMF (20 mL) and CH2Cl2 (100 mL) were added. To this gently stirred solution was added polymeric DCC resin (4 g, loading 1.4 mmol/g, 5.6 mmol). The mixture was allowed to stir for 1 hour at ambient temperature followed by addition of the benzyl amine, 6-(aminomethyl)-7-fluoro-1, 2-benzisoxazol-3-amine dihydrochloride, Example 159f (350 mg, 1.40 mmol) in DMF (75 mL), CH2Cl2 (25 mL) and excess TEA (3 mL). The resulting mixture was stirred over night followed by gentle heating to 40°C for 1 hour. The resin was filtered and the residue was purified by prep HPLC (RP, acetonitrile gradient in 0.1% TFA) to afford 261 mg (34%) of Example 159g as an amorphous solid.

LCMS (RP, 15-90% acetonitrile in 0. 1% ammonium acetate over 14 min): retention time: 6.72 min; (M+H) += 534, Negative Ion mode (M-H)-= 532.

Example 160 Example 160 : 1H NMR (400 MHz, DMF-d7) # 9.51 (br s, 2H), 8.56 (t, J = 5.9 Hz, 1H), 8.06-8. 00 (m, 3H), 7.48-7. 31 (m, 7H), 7.14-7. 11 (m, 2H), 6.87 (s, 1H), 6.78 (s, 1H), 5.55 (br s, 2H), 5. 21 (s, 2H), 4.59 (s, 2H), 4.46 (d, J = 5. 6 Hz, 2H), 4.05-3. 98 (m, 1H), 2.90-2. 85 (m, 1H), 1.63-1. 49 (m, 2H), 1.17 (d, J = 6.6 Hz, 3H), 0.89 (t, J = 7.4 Hz, 3H), 0.78-0. 65 (m, 4H); 13C NMR (100 MHz, DMF-d7) 5 167.95, 167.50, 166.9, 165.0, 152.15, 151.95, 149.9, 144.3, 138.2, 137.4, 134.1, 133.8, 130.4, 129.0, 128.59, 128.49, 128.38, 127.7, 122.0, 117.8, 116.7, 114.2, 66.9, 48.6, 47.4, 42.9, 29.8, 24.4, 20.5, 11.0, 6.7 ; HRMS (ES) calcd for C36H4, N, O, 665.3194, found 665.3230.

Example 161 Example 161: 1H NMR (400 MHz, DMF-d7) 8 9.50 (br s, 1H), 9.12 (br s, 1H), 8.56 (t, J = 5.8 Hz, 1H), 8.07-8. 01 (m, 4H), 7.48-7. 31 (m, 7H), 7.13 (s, 1H), 6.85 (s, 1H), 6.75 (s, 1H), 6.25 (s, 1H), 5.53 (s, 2H), 5.21 (s, 2H), 4.60 (s, 2H), 4.46 (d, J = 5.8 Hz, 2H), 4.06-3. 96 (m, 1H), 1. 64-1. 44 (m, 11H), 1.17 (d, J = 6.7 Hz, 3H), 0.89 (t, J = 7.5 Hz, 3H) ; 13C NMR (100 MHz, DMF-d7) 8 168.0, 167.45, 166.95, 165.2, 152.5, 150.0, 149.9, 144.3, 138.3, 137.4, 134.1, 133.9, 129.81, 129.01, 128.58, 128.51, 128.37, 127.7, 121.6, 117.9, 116.6, 114.2, 66.9, 51.5, 48.8, 47.4, 43.0, 29.8, 28.5, 20.5, 11.0 ; HRMS (ES) calcd for C37H45N805 681.3507, found 681.3498.

Example 162 Example 162: 1H NMR (400 MHz, DMF-d7) 89. 50 (br s, 1H), 9.11 (br s, 1H), 8. 56 (t, J = 5.8 Hz, 1H), 8. 07-8. 00 (m, 4H), 7.48-7. 30 (m, 11H), 7.13 (s, 1H), 6.85 (s, 1H), 6.25 (s, 1H), 5. 52 (s, 2H), 5. 21 (s, 2H), 4.60 (s, 2H), 4.46 (d, J = 5.8 Hz, 2H), 4.07-3. 96 (m, 1H), 1.64-1. 44 (m, 11H), 1.17 (d, J = 6.7 Hz, 3H), 0.89 (t, J = 7.4 Hz, 3H); 13C NMR (100 MHz, DMF-d7) 8 168.0, 167.45, 166.96, 165.2, 152.5, 150.02, 149.93, 144.3, 138.3, 137.4, 134.1, 133.9, 129.82, 129.02, 128.58, 128.52, 128.38, 127.8, 121.6, 117.9, 116.6, 114.2, 66.9, 51.5, 48.8, 47.4, 43.0, 29.8, 28.5, 20.5, 11.0 ; HRMS (ES) calcd for C37H45N805 681.3507, found 681.3494.

Example 163 Example 163a: To a stirred mixture of di-Boc-4-amino- hydroxybezamidine (3.0 g, 8.2 mmol) and pyridine (3.3 ml) in dichloromethane (9 ml) cooled in an ice bath was added trichloroacetic acid anhydride (3.3 ml, 18.1 mmol) slowly in three portion over 5 minutes. The reaction was stirred at ambient temperature for 20 hours. The reaction was purified by silica gel chromatography 80-100% dichloromethane/hexane) to give 3.17 g colorless solid. 1HNMR (300 MHz, CDCl3) 8 1.51 (s, 18H), 4.89 (s, 2H), 7.47 (d, J = 8.4 Hz, 2H), 8.12 (d, J = 8.1 Hz, 2H).

Example 163b: To a solution of Example 163a (3.07 g, 6.2 mmol) in dioxane (60 ml) was added 4 N hydrogen chloride/dioxane (40 ml) with stirring at ambient temperature for three hours. The reaction was concentrated in vacuo to give 2.05 g of an off-white solid. lHNMR (300 MHz, DMSO-d6) 8 4.2 (s, 2H), 7.77 (d, J = 8. 4 Hz, 2H), 8.13 (d, J = 8.1 Hz, 2H), 8.64 (br s, 3H).

Example 163c: To a stirred solution of free acid (0.3 g, 0.77 mmol), Example 163b (0.317 g, 0.86 mmol), and N- methylmorpholine (0.3 ml, 2.73 mmol) in N, N- dimethylformamide (3 ml) was added TBTU (0. 31 g, 0. 96 mmol).

Stirring was continued at ambient temperature for 18 hours.

The reaction was diluted with water and the resulting solid was collected by vacuum filtration, washed with water, and air-dried. The solid was crystallized from ethyl acetate/chloroform/hexane to give 0.15 g (30% yield) of an off-white solid. 1HNMR (300 MHz, DMSO-d6) b 1.15 (d, J = 6.6 Hz, 6H), 1.24 (d, J = 6. 3Hz, 6H), 4.04-4. 19 (m, 2H), 4.40 (d, J = 5.4 Hz, 2H), 4.45 (s, 2H), 6.69 (s, 1H), 6.72 (s, 1H), 7.01 (s, 1H), 7.12 (s, 1H), 7.45 (d, J = 8.4 Hz, 2H), 8.00-8. 08 (m, 3H), 8.66 (t, J = 5.7 Hz, 1H). HRMS (ES) calcd for C29H32N804C13 (M+H) : 661. 1607. Found: 661.1633.

Anal. Calcd for C29H32N8O4Cl3 : C, 52.62 ; H, 4.72 ; N, 16.93.

Found: C, 52.86 ; H, 4.74 ; N, 16.17.

Example 164 Example 164: To a 25mL RBF was added free amidine (1.3g, 2. 59mmol) triethylamine (lmL) and hydroxylamine hydrochloride (0. 191g, 2.75mmol). The reaction was refluxed in ethanol (lOmL) overnight. The resulting solution was diluted to 50 mL with water and methanol. The reaction was purified using reverse phase chromatography to afford the title compound (1. 21g) as a TFA salt in 87% yield.

NMR (400MHZ, CDCL3) : 1H 1.4 ppm (3H, d), 3.34 ppm (1H, m), 4.11 ppm (lH, q), 4.5 ppm (2H, d), 4.51 ppm (1H, s), 6.72 ppm (1H, s), 6. 91 ppm (2H, m), 7.08 ppm (1H, s), 7.29 ppm (1H, d), 7.31 ppm (1H, s), 7.6 ppm (2H, m).

Found C: 44.30 H: 3.71 N: 13.09 Calc. C: 53.83 H: 4.71 N: 18.31