CROSS-REFERENCE TO RELATED APPLJCAT!ONS

[0001] This application claims the benefit of U.S. Provisional Appl. Ser. No.

62/206,054, filed August 17, 2015, which is incorporated by reference as if set forth herein in its entirety.

STATEME T OF GOVERNMENT SUPPORT

[00Θ2] This invention was made with government support under grant GM053386 awarded by the National Institutes of Health. The government has certain rights in the invention.

BACKGROUND OF THE SI ENTiG

[0003] The AIDS epidemic is one of the most challenging problems in medicine in the 21 st century. Among many strategies to combat this disease, highly active antiretroviral therapy (HAART) with HIV protease inhibitors (Pis) in combination with reverse transcriptase inhibitors (RTis) continues to be the first line treatment for control of HiV infection. Although such combination therapy has improved quality of life, enhanced HiV management, and halted the progression of the disease, there remain many challenges to treating this devastating disease, including decreasing both the toxicity and complexity of these treatment regimens. In addition, there is a growing population of patients that is developing multi-drug resistant strains of HiV. And there is ample evidence that these strains can be further transmitted,

[00Θ4] Even though HAART has had a major impact on the AIDS epidemic in industrially advanced nations, it has not achieved the eradication of human immunodeficiency virus type 1 {HIV 1), in part due to the viral reservoirs remaining in blood and infected tissues. The limitation of antiviral therapy of AIDS is also exacerbated by complicated regimens, the development of drug-resistant HIV-1 variants, and a number of inherent adverse effects. Further, efforts to bring about the optimal benefits of HAART have met with a number of challenges, including (i) drug-related toxicities; (ii) partial restoration of immunologic functions once individuals developed AIDS; (iii) development of various cancers as a consequence of survival prolongation ; (iv) flame-up of inflammation in individuals receiving HAART or immune re-construction syndrome (IRS); and (v) increased cost of antiviral therapy. Such limitations of HAART are exacerbated by the development of drug-resistant HIV-1 variant.

[0005] There Is presently a paucity of antiretroviral drugs or agents that are not only substantially specific for HIV-1 , but also devoid of toxicity or side effects in the therapy of AIDS.

SUMMARY OF THE INVENTION

[0006] Embodiments of the present invention are directed to potent HIV-1 protease inhibitors or asparty! protease inhibitors for the treatment of AIDS and HIV infections. HIV-1 protease inhibitors can be critical components of antiretroviral treatment of HIV/AIDS. HIV-1 protease inhibitors can also be components of antiretroviral treatment of HIV/AIDS In a monotherapy regimen, wherein the HIV-1 protease inhibitors or asparty! protease inhibitors of the various embodiments of the present invention are administered aione; that is, in the absences of, e.g. , RT!s.

[0007] The HiV-1 protease inhibitors or asparty! protease inhibitors of the various embodiments of the present invention represent a conceptually new class of HiV-1 protease inhibitors containing unprecedented substitution patterns that result in compounds that are surprisingly and unexpectedly nearly 100-fold more potent than, e.g. , darunavir in ce!i culture assay. In some embodiments, the HIV-1 protease inhibitors or asparty! protease inhibitors of the various embodiments of the present invention can have significant antiviral activity against darunavir-resistant HIV-1 variants.

DETAILED DESCRiPTSOIN! OF THE !IWENTiO i

[0008] Reference will now be made in detail to certain embodiments of the disclosed subject matter, examples of which are illustrated in part in the accompanying drawings. While the disclosed subject matter will be described in conjunction with the enumerated claims, it will be understood that the exemplified subject matter is not intended to limit the claims to the disclosed subject matter.

[0009] Values expressed in a range format should be Interpreted in a flexible manner to include not only the numerical values explicitly recited as the limits of the range, but also to Include ail the individual numerical values or sub-ranges encompassed within that range as if each numerical value and sub-range were explicitly recited. For example, a range of "about 0.1 % to about 5%" or "about 0.1 % to 5%" should be interpreted to include not just about 0.1 % to about 5%, but also the individual values (e.g. , 1 %, 2%, 3%, and 4%) and the sub-ranges (e.g. , 0,1 % to 0.5%, 1 .1 % to 2,2%, 3.3% to 4.4%) within the indicated range. The statement "about X to Y" has the same meaning as "about X to about Y," unless indicated otherwise. Likewise, the statement "about X, Y, or about Z" has the same meaning as "about X, about Y, or about Z," unless indicated otherwise.

[0010] In this document, the terms "a," "an," or "the" are used to include one or more than one unless the context, cieariy dictates otherwise. The term "or" is used to refer to a nonexclusive "or" unless otherwise indicated. In addition, it is to be understood that the phraseology or terminology employed herein, and not otherwise defined , is for the purpose of description only and not of limitation. Any use of section headings is intended to aid reading of the document and is not to be interpreted as limiting. Further, information that is relevant to a section heading may occur within or outside of that particular section. Furthermore, all publications, patents, and patent documents referred to in this document are incorporated by reference herein in their entirety, as though individually incorporated by reference, in the event of inconsistent usages between this document and those documents so incorporated by reference, the usage in the incorporated reference should be considered supplementary to that of this document; for irreconcilable inconsistencies, the usage in this document controls.

[0011] in the methods described herein, the steps can be carried out in any order without departing from the principles of the Invention, except when a temporal or operational sequence is explicitly recited. Furthermore, specified steps can be carried out concurrently unless explicit claim language recites that they be carried out separately. For example, a claimed step of doing X and a claimed step of doing Y can be conducted simultaneously within a single operation, and the resulting process will fail within the literal scope of the claimed process.

[0012] The term "about" as used herein can allow for a degree of variability in a value or range, for example, within 10%, within 5% , or within 1 % of a stated value or of a stated limit of a range,

[0013] The term "substantially" as used herein refers to a majority of, or mostly, as in at least about 50%, 60%, 70%, 80%, 90%, 95%, 96%, 97%, 98%, 99%, 99.5%, 99.9% , 99,99%, or at least about 99.999% or more.

[0014] The term "substituted" or "substituent" as used herein refers to a group that can be or is substituted onto a molecule or onto another group. Examples of substituents include, but are not limited to, a halogen (e.g., F, Gi, Br, and I), OR, OC(0)N(R) ₂ , CN, NO, N0 ₂ , ON0 ₂ , azido, CF3, OCF3, R, O (oxo), S (thiono), C(O), S(O), methylenedioxy, ethylenedioxy, N(R) ₂ , SR, SOR, SO2R, S0 ₂ N(R) ₂ , SO3R, -(CH ₂ )o- ₂ P(0)(OR) ₂ , C(0)R, C(0)C(0)R, C(0)CH ₂ C(0)R, C(S)R, C(0)OR, OC(0)R, C(0)N(R) ₂ , 0C(0)N(R) ₂ , C(S)N(R) ₂ , (CH ₂ )o-2N(R)C(0)R, (CH ₂ )o- ₂ N(R)C(0)OR, (CH ₂ )o- ₂ N(R)N(R) ₂ , N(R)N(R)C(0)R, N(R)N(R)C(0)OR, N(R)N(R)CON(R) ₂ , N(R)S0 ₂ R, N(R)S0 ₂ N(R) ₂ , N(R)C(0)OR, N(R)C(0)R, N(R)C(S)R, N{R)C{0)N(R) ₂ , N(R)C(S)N(R) ₂ , N{COR)COR, N{OR)R, C(=NH)N(R) ₂ , C(0)N(OR)R, or C(=NOR)R wherein R can be hydrogen, alkyi, acyi, cyc!oaiky!, aryl, ara!kyl, heterocyclyi, heteroary!, or heteroarylalkyi, wherein any alkyi, acyl, cycloa!kyl, aryl, aralkyi, heterocyciyi, heteroaryi, or heteroarylalkyi or two R groups bonded to a nitrogen atom or to adjacent nitrogen atoms can together with the nitrogen atom or atoms form a heterocyclyi, which can be mono- or independently multi-substituted.

[0015] The term "alkyi" as used herein refers to substituted or unsubstituted straight chain and branched alkyi groups and cycioalkyl groups having from 1 to 40 carbon atoms (C-i-C o), 1 to about 20 carbon atoms (Ci-C ₂ o), 1 to 12 carbons (Ci-Ci ₂ ), 1 to 8 carbon atoms (C-i-Ce), or, in some embodiments, from 1 to 6 carbon atoms (C i-Ce). Examples of straight chain aikyl groups include those with from 1 to 3 carbon atoms such as methyl, ethyl, n- propyl, n-butyl, n-pentyi, n-hexyl, n-heptyi, and n-octyl groups. Examples of branched alkyi groups include, but are not limited to, isopropyl, iso-butyl, sec-butyl, t-butyi, neopentyi, isopentyi, and 2,2-dlmethylpropyl groups. As used herein, the term "aikyl" encompasses n- aikyl, isoalky!, and anteisoalkyl groups as well as other branched chain forms of alkyi. Representative substituted aikyl groups can be substituted one or more times with any of the groups listed herein, for example, amino, hydroxy, cyano, carboxy, nitro, thio, alkoxy, and halogen groups.

[0016] The term "aikenyl" as used herein refers to substituted or unsubstituted straight chain and branched monovalent groups having from 2 to 20 carbon atoms(C ₂ -C ₂ o), 2 to 12 carbons (C ₂ -Ci ₂ ), 2 to 8 carbon atoms (C ₂ -Ce) or, in some embodiments, from 2 to 4 carbon atoms (C ₂ -C,) and at least one carbon-carbon double bond. Examples of straight chain aikenyl groups include those with from 2 to 8 carbon atoms such as -CH=CH ₂ , -CH=CHCH3~, and the like. Examples of branched a!keny! groups include, but are not limited to, -CH=CH(CH ₃ ) and the like.

[0017] The term "hydroxyaikyl" as used herein refers to alky! groups as defined herein substituted with at least one hydroxyl (-OH) group,

[0018] The term "cycloaikyi" as used herein refers to substituted or unsubstituted cyclic aikyl groups such as, but not limited to, cyclopropyi, cyclobutyi, cyciopentyi, cyclohexyl, cyciohepfyl, and cyclooctyl groups, in some embodiments, the cycloaikyi group can have 3 to about 8-12 ring members, whereas in other embodiments the number of ring carbon atoms range from 3 to 4, 5, 6, or 7, In some embodiments, cycloaikyi groups can have 3 to 6 carbon atoms (Ca-Cs). Cycloaikyi groups further include polycyclic cycloaikyi groups such as, but not limited to, norbornyl, adamantyl, bornyi, camphenyl, isocamphenyl, and carenyl groups, and fused rings such as, but not limited to, decalinyl, and the like.

[0019] The term "cycioalkyialkyi" as used herein refers to substituted or unsubstituted alkyi groups as defined herein in which a hydrogen or carbon bond of an alkyl group as defined herein is replaced with a bond to a cycloaikyi group as defined herein . Representative cycioalkyialkyi groups include, but are not limited to, cyclopentylalkyl.

[0020] The term "aikylcycioalkyl" as used herein refers to substituted or unsubstituted cycloaikyi groups as defined herein in which a hydrogen of a cycloaikyi group as defined herein is replaced with a bond to an alkyi group as defined herein. Representative aikylcycioalkyl groups include, but are not limited to, alkyicyciopropyl.

[0021] The term "acyi" as used herein refers to a group containing a carbonyl moiety wherein the group is bonded via the carbonyl carbon atom. The carbonyl carbon atom is also bonded to another carbon atom, which can be part of a substituted or unsubstituted aikyl, aryi, aralkyl cycloaikyi, cycioalkyialkyi, heterocyciyi, heterocyclylalkyl, heteroaryl, heteroarylalkyl group or the like. In the special case wherein the carbonyl carbon atom is bonded to a hydrogen, the group is a "formy!" group, an acyi group as the term is defined herein. An acyi group can include 0 to about 12-40, 6-10, 1 -5 or 2-5 additional carbon atoms bonded to the carbonyl group. An acryloyi group is an example of an acyi group. An acyi group can also include heteroatoms within the meaning here. A nicotinoyl group (pyridyl-3- carbonyl) is an example of an acyi group within the meaning herein. Other examples include acetyl, benzoyl, phenyiacetyi, pyridylacetyl, cinnamoyl, and acryloyi groups and the like. When the group containing the carbon atom that is bonded to the carbonyl carbon atom contains a halogen, the group is termed a "haloacyi" group. An example is a trifiuoroacetyi group.

[0022] The term "heterocyciylcarbonyl" is an example of an acyi group that is bonded to a substituted or unsubstituted heterocyciyi group, as the term "heterocyciyi" is defined herein. An example of a heterocyciylcarbonyl group is a prolyl group, wherein the prolyl group can be a D- or an L-prolyl group,

[0023] The term "aryi" as used herein refers to substituted or unsubstituted cyclic aromatic hydrocarbons that do not contain heteroatoms in the ring. Thus aryi groups include, but are not limited to, phenyl, azulenyl, heptaienyi, biphenyl, indacenyl, fluorenyl, phenanthrenyi, triphenyienyi, pyrenyl, naphthacenyl, chrysenyl, bipheny!enyi, anthracenyl, and naphthyl groups, in some embodiments, aryi groups contain about 6 to about 14 carbons (CO-C M) or from 6 to 1 0 carbon atoms (Ce-do) in the ring portions of the groups. Aryi groups can be unsubstituted or substituted, as defined herein. Representative substituted aryi groups can be mono-substituted or substituted more than once, such as, but not limited to, 2-, 3-, 4-, 5-, or e-substituted phenyl or 2-8 substituted naphthyl groups, which can be substituted with carbon or non-carbon groups such as those listed herein.

[0024] The term "araikyi" and "aryialkyl" as used herein refers to a!kyi groups as defined herein in which a hydrogen or carbon bond of an alkyl group is replaced with a bond to an aryi group as defined herein. Representative aralkyl groups include benzyl and phenylethyl groups and fused (cycioalky!aryi)aikyi groups such as 4-ethyl-indanyl. Aralkenyl groups are alkenyi groups as defined herein in which a hydrogen or carbon bond of an alkyl group is replaced with a bond to an aryi group as defined herein.

[0025] The term "heierocyciyi" as used herein refers to substituted or unsubstituted aromatic and non-aromatic ring compounds containing 3 or more ring members, of which, one or more is a heteroatom such as, but not limited to, N, O, and S. Thus, a heterocyciyi can be a cycioheteroaikyl, or a heteroaryl, or if poiycyclic, any combination thereof. In some embodiments, heterocyciyi groups Include 3 to about 20 ring members, whereas other such groups have 3 to about 5 ring members, in some embodiments, heterocyciyi groups include heierocyciyi groups that include 3 to 8 carbon atoms (Cs-Cs), 3 to 6 carbon atoms (Ce-Ce) or 8 to 8 carbon atoms (Ce-Ce). A heterocyciyi group designated as a Cz-heterocyclyl can be a 5-ring with two carbon atoms and three heteroatoms, a 6-ring with two carbon atoms and four heteroatoms and so forth. Likewise a Ci-heterocyciyl can be a 5-ring with one heteroatom, a 8-ring with two heteroatoms, and so forth. The number of carbon atoms plus the number of heteroatoms equals the total number of ring atoms, A heterocyciyi ring can also include one or more double bonds. A heteroaryl ring is an embodiment of a heterocyciyi group. The phrase "heterocyciyi group" includes fused ring species including those thai include fused aromatic and non-aromatic groups. Representative heterocyciyi groups include, but are not limited to pyrroiidinyl, azetidinyi, piperidynyi, piperazinyl, morphoiinyl, chromanyl, indolinonyl, isoindolinonyl, furanyi, pyrroiidinyl, pyridinyl, pyrazinyl, pyrimidinyl, triazinyl, thiophenyl, tetrahydrofuranyi, pyrroiyi, oxazoly!, oxadiazoiy!, imidazoiyl, iriazyoiyi, tetrazo!yi, benzoxazolinyl, benzthiazolinyl, and benzimidazolinyl groups. Examples of Indolinonyl groups include groups having the general formula: , wherein R Is as defined herein.

Examples of isoindolinonyl groups include groups having the general formula: , wherein R is as defined herein.

Examples of benzoxazolinyl groups include groups having the general formula:

, wherein R is as defined herein.

zthiazolinyl groups include groups having the general formula: , wherein R is as defined herein.

in some embodiments, the group R in benzoxazolinyl and benzthiazolinyl groups is an N(R)2 group. In some embodiments, each R is hydrogen or alkyi, wherein the alkyl group is substituted or unsubstituted. In some embodiments, the alkyl group is substituted with a heterocyclyi group (e.g. , with a pyrrolidinyl group).

[0026] The term "heterocyc!yla!kyi" as used herein refers to alkyl groups as defined herein in which a hydrogen or carbon bond of an alkyl group as defined herein is replaced with a bond to a heterocyclyi group as defined herein. Representative heferocyclyiaikyl groups include, but are not limited to, furan-2-y! methyl, furan-3-y! methyl, pyridine-3-yl methyl, tetrahydrofuran-2-yl methyl, and indoi-2-yi propyl.

[0027] The term "heterocyc!yla!kyioxy" as used herein refers to alkyi groups as defined herein in which a hydrogen or carbon bond of an aikyl group as defined herein is replaced with a bond to a heterocyclyi group as defined herein and the alkyl group is attached to an oxygen . Representative heterocyciylalkyloxy groups include, but are not limited to, -O- (Chfejqheterocyclyl, wherein q is an integer from 1 to 5. In some embodiments, heterocyciylalkyloxy groups include -0-(CH2)qmorpholinyl such as -G-CHsCHz-morphoiine.

[0028] The term "heteroaryialky!" as used herein refers to alkyi groups as defined herein in which a hydrogen or carbon bond of an alkyl group is replaced with a bond to a heteroaryl group as defined herein.

[0029] The term "alkoxy" as used herein refers to an oxygen atom connected to an alky! group, including a cycioaikyl group, as are defined herein. Examples of linear alkoxy groups include but are not limited to meihoxy, ethoxy, propoxy, butoxy, pentyioxy, hexyloxy, and the like. Examples of branched alkoxy include but are not limited to isopropoxy, sec- bufoxy, tert-butoxy, isopentyloxy, isohexyloxy, and the like. Examples of cyclic alkoxy include but are not limited to cyc!opropyloxy, cyclobutyioxy, cyciopentyioxy, cyclohexy!oxy, and the like. An alkoxy group can include one to about 12-20 or about 12-40 carbon atoms bonded to the oxygen atom, and can further Include double or triple bonds, and can also include heteroatoms. For example, an ailyioxy group is an alkoxy group within the meaning herein. A methoxyethoxy group is also an alkoxy group within the meaning herein, as is a methy!eneciioxy group in a context where two adjacent atoms of a structure are substituted therewith.

[0030] The term "amine" as used herein refers to primary, secondary, and tertiary amines having, e.g. , the formula N(group)3 wherein each group can independently be H or non-H, such as alkyi, aryl, and the like. Amines include but are not limited to R-NHs, for example, alkyiamines, arylammes, alkylarylamines; R2NH wherein each R is independently selected, such as dialkylamines, diarylamines, aralkylamines, heterocyclylamines and the like: and R3N wherein each R is independently selected, such as triaikylamines, dialkylarylamines, alkyldiarylamines, triarylamines, and the like. The term "amine" also includes ammonium ions as used herein.

[0031] The term "amino group" as used herein refers to a substltuent of the form -

NH2, -NHR, -NR2, -NR?, ⁺ , wherein each R is independently selected, and protonated forms of each, except for -NR3 ⁺ , which cannot be protonated. Accordingly, any compound substituted with an amino group can be viewed as an amine. An "amino group" within the meaning herein can be a primary, secondary, tertiary, or quaternary amino group. An "alkylamino" group includes a monoalkylamino, dialkylamino, and triaikylamino group.

[0032] The terms "halo," "halogen," or "halide" group, as used herein, by themselves or as part of another substltuent, mean, unless otherwise stated, a fluorine, chlorine, bromine, or iodine atom.

[0033] The term "haioaikyl" group, as used herein, includes mono-halo alkyi groups, poly-halo aikyl groups wherein ail halo atoms can be the same or different, and per-halo alkyi groups, wherein all hydrogen atoms are replaced by halogen atoms, such as fiuoro. Examples of haioaikyl Include trifluoromethyl, 1 , 1 -dichioroethyi, ,2-dlchloroethyl, 1 ,3- dibromo-3,3-difluoropropyl, perfiuorobuty!, ~CF(CH3)2 and the like.

[0034] As used herein, the term "salts" and "pharmaceutically acceptable salts" refer to derivatives of the disclosed compounds wherein the parent compound Is modified by making acid or base salts thereof. Examples of pharmaceutically acceptable salts include, but are not limited to, mineral or organic acid salts of basic groups such as amines; and alkali or organic salts of acidic groups such as carboxyhc acids. Pharmaceutically acceptable salts include the conventional non-toxic salts or the quaternary ammonium salts of the parent compound formed, for example, from non-toxic inorganic or organic acids. For example, such conventional non-toxic salts include those derived from inorganic acids such as hydrochloric, hydrobromic, sulfuric, sulfamic, phosphoric, and nitric; and the salts prepared from organic- acids such as acetic, propionic, succinic, glycolic, stearic, lactic, malic, tartaric, citric, ascorbic, pamoic, maleic, hydroxymaleic, phenylacetic, glutamic, benzoic, salicylic, suifanilic, 2-acetoxybenzoic, fumaric, toluenesulfonic, methanesulfonic, ethane disuifonic, oxalic, and isethionic, and the like.

[0035] Pharmaceutically acceptable salts can be synthesized from the parent compound which contains a basic or acidic moiety by conventional chemical methods. In some instances, such salts can be prepared by reacting the free acid or base forms of these compounds with a stoichiometric amount of the appropriate base or acid in water or in an organic solvent, or in a mixture of the two; generally, nonaqueous media like ether, ethyl acetate, ethanol, isopropanol, or acetonitrile are preferred. Lists of suitable salts are found in Remington's Pharmaceutical Sciences, 17th ed., Mack Publishing Company, Easton, Pa. , 1985, the disclosure of which is hereby incorporated by reference.

[0036] The term "solvate" means a compound, or a salt thereof, that further includes a stoichiometric or non-stoichiometric amount of solvent bound by non-covaient intermoiecuiar forces. Where the solvent is water, the solvate is a hydrate.

[0037] The term "prodrug" means a derivative of a compound that can hydro!yze, oxidize, or otherwise react under biological conditions (in vitro or in vivo) to provide an active compound, particularly a compound of the invention. Examples of prodrugs include, but are not limited to, derivatives and metabolites of a compound of the invention that include biohydrolyzable moieties such as biohydrolyzable amides, biohydrolyzable esters, biohydroiyzable carbamates, biohydrolyzable carbonates, biohydrolyzable ureides, and biohydrolyzable phosphate analogues. Specific prodrugs of compounds with carboxyl functional groups are the lower aikyl esters of the carboxyiic acid. The carboxy!ate esters are conveniently formed by esterifying any of the carboxyiic acid moieties present on the molecule. Prodrugs can typically be prepared using well-known methods, such as those described by Burger's Medicinal Chemistry and Drug Discovery 6th ed. (Donald J. Abraham ed. , 2001 , Wiley) and Design and Application of Prodrugs (H. Bundgaard ed., 1985, Harwood Academic Publishers GmbH).

[0038] Various embodiments of the present invention are directed to a compound of the formula (I):

or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or ciathrate thereof, wherein: n is an integer from 0 to 3; X and X ¹ are each, independently, (-Chfe- wherein m is 1 or 2; R ¹ is ~-N3 or -NR¾, wherein each R ⁵ is, independently, H, unsubstituted or substituted aikyl, unsubstituted or substituted aikenyl or a nitrogen protecting group, such as an alkyioxycarbonyl group, Including a t-butyl oxycarbonyl group; R ⁷ is H or unsubstituted or substituted alkyi or R ¹ and R ⁷ , together with the carbon atom to which they are attached, form a heterocycie; R ² is unsubstituted or substituted aikyl, unsubstituted or substituted aikenyl, unsubstituted or substituted aikoxy, unsubstituted or substituted hydroxyalkyl, halo, unsubstituted or substituted heterocyclylalkyloxy, -Q-(CH2)o-2p(0)(OR ⁶ )2, wherein each R ⁶ is independently H or unsubstiuted or substituted alkyi or substituted or unsubstituted aryl or R ¹ is -NR ⁵ 2, wherein one R ⁵ and one R ² are joined to represent the group - (CH2)p(CHCH)d(CH2)qO- wherein p is an integer from 0 to 5, d is 0 or 1 , and q is an integer from 0 to 5; R ³ is substituted or unsubstituted a!kyi; and R ⁴ is unsubstituted or substituted aryi, unsubstituted or substituted benzthiazoie, unsubstituted or substituted benzoxazoie, unsubstituted or substituted benzofuranyl or unsubstituted or substituted indoiyi.

[0039] In some examples, R ² is unsubstituted or substituted alkyi, unsubstituted or substituted a!kenyi, unsubstituted or substituted aikoxy, unsubstituted or substituted hydroxyalkyi, halo, unsubstituted or substituted heterocyciylalkyioxy: and R ⁴ is unsubstituted or substituted benzthiazoie, unsubstituted or substituted benzoxazoie, unsubstituted or substituted benzofuranyl or unsubstituted or substituted indo!yi. In other examples, R is - NR ⁵ 2.

[0040] Various other embodiments of the present invention are directed to a compound of the formula (la):

(la) or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or ciathrate thereof, wherein n, X, X ¹ , R ¹ , R ² , R ⁴ , and R ⁷ are as defined herein.

[0041] All diastereomers of the compounds of the formula (I) and (la) are contemplated herein, including compounds of the formula (lb) and (lc):

(!c)

wherein n, X, X ¹ , R ¹ , R ² , R ³ , R ⁴ , and R ⁷ are as defined herein.

[0042] In some embodiments, the substituted ary! groups represented by R ⁴ herein can be selected from the rou consistin of:

[0043] in some embodiment

wherein R ³ is Ci-Ce aikyl, Ci ~Ce aikylamino, Ca-Ce cycloalkylamino, C3-C5 cycioaikyl-Cs-Ce heterocycloamino, Ca-Ce heterocyclo-Ca-Ce cycloalkylamino o Cs-Ce heterocyc!oamino; X ² S, O or NR ⁹ , wherein R ⁹ is H, alkiyi, cyicoalkyi or alkylaryl; and X ³ is S, O, NR ⁹ or GR ⁹ wherein R ⁹ is H, alkiyi, cyicoalkyi or alkylaryl. Non-limiting examples of R ⁴ include -NHCH3,

NHCH(CH ₃ )2, -NHcyclopropyl, -NHCH ₂ CH(CH3) ₂ , -NHC(CH ₃ )s, and

[0044] Examples of the compounds of the formula (I) and (ia)-(ic) include, but are not limited to:

U 2016/047381

 47381





Ο- ^ ΗΐΐΘ

or a pharmaceuiicaiiy accepiable salt, polymorph, prodrug, solvate or clathrate thereof.

[0045] Examples of the compounds of the formula (I) and (la)-(lc) also include, but are not limited to:



30

31

or a pharmaceutically acceptable salt, poiymorph, prodrug, solvate or ciathrate thereof, [0046] Examples of the compounds of the formula (I) and (la)-(lc) also include, but are not limited to:

or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or ciathrate thereof; wherein e is 0 or 1 ; and R' Is H or unsubstituted or substituted aikyi (e.g., methyl).

[0047] Examples of the compounds of the formula (I) and (la)-(lc) also include, but are not limited to:

or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or clathrate thereof; wherein e is Q or 1 (e.g. , 0); and X ⁷ is:

[0048] Examples of the compounds of the formula (I) and (!a)-(ic) also include, but are not limited to:

or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or clathrate thereof; wherein e is 0 or 1 (e.g., 0); R' is H or unsubstituted or substituted alkyi (e.g., methyl); each R" is independently H or halo (e.g. , F); X" is CH or N; and X ⁵ is CM or N. In some examples, R' is H; oniy one of R ^! " Is halo (e.g. , 3-F or 4-F); and only one of X ⁴ and X ⁵ Is N (e.g. , X ⁴ is N). in other examples, R' is H; both R" groups are H; and oniy one of X ⁴ and X ⁵ Is N (e.g. , X ⁵ Is N).

[0049] Examples of the compounds of the formula (I) and (ia)-(ic) also include, but are not limited to:

or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or clathrate thereof; wherein e is 0 or 1 (e.g. , 0); R' is H or unsubstituted or substituted alkyi (e.g., methyl); and X ⁵ is:

In some examples, R' is H.

[0050] Examples of the compounds of the formula (I) and (ia)-(ic) also include, but are not limited to:

or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or clathrate thereof; wherein f is 0, 1 , 2, 3, 4 or 5; and R ⁸ is C1-C5 aikyi, C1-C5 alkylamino, C3-C5 cycloalkyiamino (e.g. , isopropyi or cyclopropyi), Ca-Cs cycloalky!-Cs-Cs heterocycloamino, C3~Ce heterocyc!o- C3 cycloalkyiamino or Ca-Ce heterocycloamino.

[0051] Examples of the compounds of the formula (I) and (!a)-(ic) also include, but are not limited to:

or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or clathrate thereof; wherein f is 0, 1 , 2, 3, 4 or 5.

[0052] Various embodiments of the present invention are directed to a compound of the formula (II):

or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or clathrate thereof, wherein: n is an integer from 0 to 3; X and X ¹ are each, independently, (-CH2- wherein m is 1 or 2; R ⁵ is, unsubstituted or substituted aikyi; R ^? is H or unsubstituted or substituted alkyl; R ^z is unsubstituted or substituted aikyi, unsubstituted or substituted alkenyi, unsubstituted or substituted aikoxy, unsubstituted or substituted hydroxyaikyl, halo, unsubstituted or substituted heterocyciylalkyioxy, ~0-(CH2)o 2P(Q)(OR ⁶ )2, wherein each R ⁶ is independently H or unsubstiuted or substituted aikyi or substituted or unsubstituted aryi; R ³ Is substituted or unsubstituted aikyi; and R ⁴ is unsubstituted or substituted ary!, unsubstituted or substituted benzthlazo!e, unsubstituted or substituted benzoxazoie, unsubstituted or substituted benzofuranyl or unsubstituted or substituted indoiyi .

[0053] Various other embodiments of the present invention are directed to a compound of the formula (!la):

or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or clathrate thereof, wherein n, X, X ¹ , R ² , R ⁴ , R ⁵ , and R ⁷ are as defined herein.

[0054] All diastereomers of the compounds of the formula (I I) and (l!a) are contemplated herein, including compounds of the formula (l ib) and (He):

[0Q583 In some embodiment

wherein R ⁸ is C-i-Ce alky!, C-i-Ce alkylamino, Ca-Ce cycloaikylamino, C3-C6 cycioaikyi-C3-Cs heterocycioamino, C ₃ -Ce heterocyeio-Ca-Ce cycloaikylamino or d-Ce heterocycioamino; X ² is S, O or NR ⁹ , wherein R ⁹ is H, aikiyl, cyicoaikyl or alkylaryl; and X ³ is S, O, NR ⁹ or CR ⁹ wherein R ^s is H, alklyi, cyicoaikyl or alkylaryl. Non-limiting examples of R ⁴ include -NHCH3, -

NHCH(CH ₃ ) ₂ , -NHcyclopropyi, -NHCH ₂ CH(CH3) ₂ , -NHC(CH ₃ )3, and .

[0Q57] Various embodiments of the present invention also contemplate pharmaceutical compositions comprising one or more compounds of the various embodiments of the present invention (e.g. a compound of the formula (i), (ia)-(ic), (II), and (i la)-(l ic)) and one or more pharmaceutically acceptable carriers, diluents, excipients or combinations thereof. A "pharmaceutical composition" refers to a chemical or biological composition suitable for administration to a subject (e.g. , mammal). Such compositions may be specifically formulated for administration via one or more of a number of routes, including but not limited to buccal, cutaneous, epicutaneous, epidural, infusion, Inhalation, intraarterial, intracardiac intracerebroventricular, intradermal, intramuscular, intranasal, intraocular, intraperitoneal, intraspinal, intrathecal, intravenous, oral, parenteral, pulmonary, rectally via an enema or suppository, subcutaneous, subdermai, sublingual, transdermal, and transmucosal. In addition, administration can by means of capsule, drops, foams, gel, gum, injection, liquid, patch , pill, porous pouch, powder, tablet, or other suitable means of administration.

[0Q58] A "pharmaceutical excipient" or a "pharmaceutically acceptable exclpient" comprises a carrier, sometimes a liquid, in which an active therapeutic agent is formulated. The excipient generally does not provide any pharmacological activity to the formulation, though it may provide chemical and/or biological stability, and release characteristics. Examples of suitable formulations can be found, for example, in Remington, The Science And Practice of Pharmacy, 20th Edition, (Gennaro, A. R., Chief Editor), Philadelphia College of Pharmacy and Science, 2000, which is incorporated by reference in its entirety,

[0059] As used herein "pharmaceutically acceptable carrier" or "excipient" includes any and all solvents, dispersion media, coatings, antibacterial and antifungal agents, isotonic and absorption delaying agents that are physiologically compatible. In one embodiment, the carrier is suitable for parenteral administration . Alternatively, the carrier can be suitable for intravenous, intraperitoneal, intramuscular, sublingual, or oral administration. Pharmaceutically acceptable carriers include sterile aqueous solutions or dispersions and sterile powders for the extemporaneous preparation of sterile injectable solutions or dispersion. The use of such media and agents for pharmaceutically active substances is well known in the art. Except insofar as any conventional media or agent is incompatible with the active compound, use thereof in the pharmaceutical compositions of the invention is contemplated. Supplementary active compounds can also be incorporated into the compositions,

[0060] Pharmaceutical compositions may be sterile and stable under the conditions of manufacture and storage. The composition can be formulated as a solution, microemulsion, liposome, or other ordered structure suitable to high drug concentration. The carrier can be a solvent or dispersion medium containing , for example, water, ethanol, polyol (e.g. , glycerol, propylene glycol, and liquid polyethylene glycol), and suitable mixtures thereof. The proper fluidity can be maintained , for example, by the use of a coating such as lecithin , by the maintenance of the required particle size in the case of dispersion and by the use of surfactants.

[0061] in many cases, if will be preferable to include isotonic agents, for example, sugars, polyalcohois such as mannitol, sorbitol, or sodium chloride in the composition . Prolonged absorption of the injectable compositions can be brought about by including in the composition an agent which delays absorption, for example, monostearate salts and gelatin . Moreover, the compounds described herein can be formulated in a time release formulation, for example in a composition that includes a slow release polymer. The active compounds can be prepared with carriers that will protect the compound against rapid release, such as a controlled release formulation, including implants and microencapsulated delivery systems. Biodegradable, biocompatible polymers may be used, such as ethylene vinyl acetate, poiyanhydrldes, polygiycoiic acid, collagen, polyorthoesters, polylactic acid and polylactic, polygiycoiic copolymers (PLG). Many methods for the preparation of such formulations are known to those skilled in the art.

[0062] Oral forms of administration are also contemplated herein. The pharmaceutical compositions of the present invention may be orally administered as a capsule (hard or soft), tablet (film coated, enteric coated or uncoated), powder or granules (coated or uncoated) or liquid (solution or suspension). The formulations may be conveniently prepared by any of the methods well-known in the art. The pharmaceutical compositions of the present invention may include one or more suitable production aids or excipients including fillers, binders, disintegrants, lubricants, diluents, flow agents, buffering agents, moistening agents, preservatives, colorants, sweeteners, flavors, and pharmaceutically compatible carriers.

[0063] For each of the recited embodiments, the compounds can be administered by a variety of dosage forms as known in the art. Any biologically-acceptable dosage form known to persons of ordinary skiii in the art, and combinations thereof, are contemplated . Examples of such dosage forms Include, without limitation, chewable tablets, quick dissolve tablets, effervescent tablets, reconstitutabie powders, elixirs, liquids, solutions, suspensions, emulsions, tablets, multi-layer tablets, bl-layer tablets, capsules, soft gelatin capsules, hard gelatin capsules, caplets, lozenges, chewable lozenges, beads, powders, gum, granules, particles, micropartic!es, disperslble granules, cachets, douches, suppositories, creams, topicais, inhalants, aerosol inhalants, patches, particle inhalants, Implants, depot implants, ingestibles, injectab!es (including subcutaneous, intramuscular, intravenous, and intradermal), infusions, and combinations thereof.

[0064] Other compounds which can be included by admixture are, for example, medically inert ingredients (e.g. , solid and liquid diluent), such as lactose, dextrosesaccharose, cellulose, starch or calcium phosphate for tablets or capsules, olive oil or ethyl oleate for soft capsules and water or vegetable oil for suspensions or emulsions; lubricating agents such as silica, talc, stearic acid , magnesium or calcium stearate and/or polyethylene glycols; gelling agents such as colloidal clays; thickening agents such as gum tragacanth or sodium alginate, binding agents such as starches, arable gums, gelatin, methyicellulose, carboxymethylceiiuiose or polyvinylpyrrolidone; disintegrating agents such as starch, alginic acid, alginates or sodium starch giycolate; effervescing mixtures; dyestuff; sweeteners; wetting agents such as lecithin , polysorbates or iaurylsuiphates; and other therapeutically acceptable accessory Ingredients, such as humectants, preservatives, buffers and antioxidants, which are known additives for such formulations.

[0Q65] Liquid dispersions for oral administration can be syrups, emulsions, solutions, or suspensions. The syrups can contain as a carrier, for example, saccharose or saccharose with glycerol and/or mannitol and/or sorbitol. The suspensions and the emulsions can contain a carrier, for example a natural gum, agar, sodium alginate, pectin , methyicellulose, carboxymethylceiiuiose, or polyvinyl alcohol.

[OG683 The amount of active compound in a therapeutic composition according to various embodiments of the present invention may vary according to factors such as the disease state, age, gender, weight, patient history, risk factors, predisposition to disease, administration route, pre-existing treatment regime (e.g. , possible interactions with other medications), and weight of the individual. Dosage regimens may be adjusted to provide the optimum therapeutic response. For example, a single bolus may be administered, several divided doses may be administered over time, or the dose may be proportionally reduced or increased as indicated by the exigencies of therapeutic situation.

[0067] "Dosage unit form," as used herein, refers to physically discrete units suited as unitary dosages for the mammalian subjects to be treated; each unit containing a predetermined quantity of active compound calculated to produce the desired therapeutic- effect in association with the required pharmaceutical carrier. The specification for the dosage unit forms of the invention are dictated by and directly dependent on the unique characteristics of the active compound and the particular therapeutic effect to be achieved, and the limitations inherent in the art of compounding such an active compound for the treatment of sensitivity in individuals, in therapeutic use for treatment of conditions in mammals (e.g. , humans) for which the compounds of the present invention or an appropriate pharmaceutical composition thereof are effective, the compounds of the present invention may be administered in an effective amount. The dosages as suitable for this invention may be a composition, a pharmaceutical composition or any other compositions described herein.

[0068] For each of the recited embodiments, the dosage is typically administered once, twice, or thnce a day, although more frequent dosing intervals are possible. The dosage may be administered every day, every 2 days, every 3 days, every 4 days, every 5 days, every 6 days, and/or every 7 days (once a week), in one embodiment, the dosage may be administered daily for up to and including 30 days, preferably between 7-10 days, in another embodiment, the dosage may be administered twice a day for 10 days. If the patient requires treatment for a chronic disease or condition, the dosage may be administered for as long as signs and/or symptoms persist. The patient may require "maintenance treatment" where the patient Is receiving dosages every day for months, years, or the remainder of their lives. In addition, the composition of this invention may be to effect prophylaxis of recurring symptoms. For example, the dosage may be administered once or twice a day to prevent the onset of symptoms in patients at risk, especially for asymptomatic patients.

[0069] The compositions described herein may be administered in any of the following routes: buccal, epicutaneous, epidural, infusion, inhalation, intraarterial, intracardial, intracerebroventricular, intradermal, intramuscular, intranasal, Intraocular, intraperitoneal, intraspinal, intrathecal, intravenous, oral, parenteral, pulmonary, rectaiiy via an enema or suppository, subcutaneous, subdermal, sublingual, transdermal, and transmucosai. The preferred routes of administration are buccal and oral. The administration can be local, where the composition is administered directly, close to, in the locality, near, at, about, or in the vicinity of, the site(s) of disease, e.g. , inflammation, or systemic, wherein the composition is given to the patient and passes through the body widely, thereby reaching the slte(s) of disease. Local administration can be administration to the cell, tissue, organ, and/or organ system, which encompasses and/or Is affected by the disease, and/or where the disease signs and/or symptoms are active or are likely to occur. Administration can be topical with a local effect, composition is applied directly where its action is desired. Administration can be enteral wherein the desired effect is systemic (non-local), composition is given via the digestive tract. Administration can be parenteral, where the desired effect is systemic, composition is given by other routes than the digestive tract.

[0070] In some embodiments, the various embodiments of the present invention contemplate compositions comprising a therapeutically effective amount of one or more compounds of the various embodiments of the present invention (e.g. , a compound of the formula (I), (ia)-(lc), (II), and (lla)-(l ic)). In some embodiments, the compositions are useful in a method for treating an HIV (e.g. , HIV-1) infection or AIDS, the method comprising administering a therapeutically effective amount of one or more compounds of any preceding claim to a patient in need thereof. In some aspects, the various embodiments of the present invention contemplate a compound of the formula (I), (la)-(lc), (II), and (i!a)-(i ic) for use as a medicament for treating a patient in need of relief from an HIV infection or AIDS.

[0071] The term "therapeutically effective amount" as used herein, refers to that amount of one or more compounds of the various embodiments of the present invention (e.g. , a compound of the formula (I), (la)-(lc), (II), and (l la)-(l lc)) that elicits a biological or medicinal response in a tissue system, animal or human, that is being sought by a researcher, veterinarian, medical doctor or other clinician, which includes alleviation of the symptoms of the disease or disorder being treated, in some embodiments, the therapeutically effective amount is that which may treat or alleviate the disease or symptoms of the disease at a reasonable benefit/risk ratio applicable to any medical treatment. However, if is to be understood that the total daily usage of the compounds and compositions described herein may be decided by the attending physician within the scope of sound medical judgment. The specific therapeutically-effective dose level for any particular patient will depend upon a variety of factors, including the condition being treated and the severity of the condition; activity of the specific compound empioyed; the specific composition employed ; the age, body weight, general health, gender and diet of the patient: the time of administration, route of administration, and rate of excretion of the specific compound employed; the duration of the treatment; drugs used in combination or coincidentally with the specific compound employed; and like factors well known to the researcher, veterinarian, medical doctor or other clinician. It is also appreciated that the therapeutically effective amount can be selected with reference to any toxicity, or other undesirable side effect, that might occur during administration of one or more of the compounds described herein.

[0072] in some embodiments, the compounds of the various embodiments of the present invention have an HiV-1 protease inhibition constant ( ;) of from about 1 f to about 200 n (e.g. , about 100 fM to about 200 n , about 100 fM to about 100 pM, about 250 fM to about 100 pM, about 500 fM to about 5 pM, about 5 p!vi to about 100 pM, about 50 pM to about 250 pM, about 500 pM to about 1 00 nM or about 300 pM to about 75 nM).

[0073] in other embodiments, the compounds of the various embodiments of the present invention have an antiviral activity in vitro against a wild-type laboratory strain, HiV- 1 with half-maxima! inhibitory concentration (ICso) of from about 1 fM to about 200 nM (e.g ., about 100 fM to about 200 nM, about 100 fM to about 100 pM, about 250 fM to about 100 pM, about 500 fM to about 5 pM, from about 10 pM to about 50 nM, about 10 pM to about 500 pM, about 100 pM to about 750 pM, about 500 pM to about 1 nM or about 500 pM to about 50 nM).

[0074] In still other embodiments, the compounds of the various embodiments of the present Invention have a d a runavir- esistant HIV-1 variants (e.g. , NL4-3R, DRVRP20, DRVRPSO, and DRVRP51) antiviral ICso of from about 200 fM to about 100 nM (e.g. , from about 200 fM to about 600 fM, about 200 fM to about 50 pM, about 500 fM to about 500 pM, about 300 fM to about 1 pM). In yet other embodiments, the compounds of the various embodiments of the present invention have a darunavir-resistant HIV-1 variants (e.g. , NL4- 3R, DRVRP20, DRVRPSO, and DRVRP51) ICSO of from about 50 pM to about 50 nM (e.g. , from about 100 pM to about 50 nM or about 500 pM to about 10 nM). in still other embodiments, the compounds of the various embodiments of the present Invention have a larunavir- resistant HIV-1 protease (e.g., NL4-3R, DRV _R P20, DRVRPSO, and DRV _R P51) antiviral ICso of from about 1 n to about 100 n (e.g., from about 0 nM to about 75 nM or about 10 n to about 75 nM).

[0075] The present invention provides for the following Clauses, the numbering of which is not to be construed as designating levels of importance:

[0076] Clause 1 relates to a compound of the formula (I):

(I)

or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or clathrate thereof, wherein: n is an integer from 0 to 3; X and X ¹ are each, independently, (-CHz- wherein m is 1 or 2; R ¹ is -N3 or -NR¾, wherein each R ⁵ is, independently, H, unsiibstituted or substituted aikyi, unsiibstituted or substituted aikenyl or a nitrogen protecting group, such as an aiky!oxycarbonyl group, Including a t-butyl oxycarbonyl group; R ⁷ is H or unsubstituted or substituted alkyi or R and R ⁷ , together with the carbon atom to which they are attached, form a heterocycle; R ^:: is unsubstituted or substituted aikyl, unsiibstituted or substituted aikenyl, unsubstituted or substituted alkoxy, unsubstituted or substituted hydroxyalkyl, halo, unsubstituted or substituted heterocyclylaikyloxy, -G~(CH2)o-2p(0)(OR ⁸ )2, wherein each R ⁶ is independently H or unsubstiuted or substituted alkyi or substituted or unsubstituted aryl or R ¹ is -NR ⁵ 2, wherein one R ⁵ and one R ² are joined to represent the group - (CH2)p(CHCH)d(CH2)qO- wherein p is an integer from 0 to 5, d is 0 or , and q is an integer from 0 to 5; R ³ Is substituted or unsubstituted alkyi; and R ⁴ Is unsubstituted or substituted aryl, unsubstituted or substituted benzthiazole, unsubstituted or substituted benzoxazoie, unsubstituted or substituted benzofuranyl or unsubstituted or substituted indolyl.

[0077] Clause 2 relates to the compound of Clause 1 or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or clathrate thereof, wherein: R ² is unsubstituted or substituted aikyl, unsubstituted or substituted aikenyl, unsubstituted or substituted alkoxy, unsubstituted or substituted hydroxyalkyl, halo, unsubstituted or substituted heterocyclylaikyloxy; and R ⁴ is unsubstituted or substituted benzthiazole, unsubstituted or substituted benzoxazoie, unsubstituted or substituted benzofuranyl or unsubstituted or substituted Indolyl.

[0078] Clause 3 relates to the compound of Ciaues 1 -2 or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or clathrate thereof, wherein R ⁴ Is unsubstituted or substituted benzthiazole,

[0079] Clause 4 relates to the compound of Clauses 1 -3, wherein R ¹ is -NR ⁵ 2.

[0080] Clause 5 relates to the compound of Clauses 1 -4, wherein the compound is:

44



or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or c!athrafe thereof.

[0081] Clause 6 relates to the compound of Clause 1 , wherein the compound of formula (I) is a compound of the formula:

or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or c!athrafe thereof; wherein e is 0 or 1 ; and R' is H or unsubstituted or substituted alky!.

[0082] Clause 7 relates to the compound of Clause 1 , wherein the compound of formula (I) is a compound of the formula:

or a pharmaceuticaiiy acceptable sait, polymorph, prodrug, solvate or clathrate thereof; wherein e is 0 or 1 ; and R' is H or unsubstituted or substituted alky!.

[0083] Clause 8 relates to the compound of Clause 1 , wherein the compound of formula (i) is a compound of the formula:

or a pharmaceutically acceptable sait, polymorph, prodrug, solvate or clathrate thereof; wherein e is 0 or 1 ; and X ⁷ is:

[0084] Clause 9 relates to the compound of Clause 1 , wherein the compound of formula (i) is a compound of the formula:

or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or clathrate thereof; wherein e is 0 or 1 ; R' is H or unsubstituted or substituted aikyl; each R" is independently H or halo; X ⁴ is CH or N; and X ⁵ is CH or N.

[0085] Clause 10 relates to the compound of Clause 9, wherein R' is H; only one of R" is halo; and only one of X ⁴ and X ^s is N,

[0088] Clause 1 1 relates to the compound of Clause 9, wherein R' is H; both R" groups are H; and only one of X* and X ⁵ is N. [0087] Clause 12 relates to the compound of Clause 1 , wherein the compound of formula (!) is a compound of the formula:

or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or ciathraie thereof; wherei ' is H or unsubstituted or substituted aikyl; and X ^s is:

[0088] Clause 13 relates to the compound of Clause 12, wherein R' is H.

[0089] Clause 14 relates to the compound of Clause 1 , wherein the compound of formula (!) is a compound of the formula:

or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or ciathraie thereof; wherein f is 0, , 2, 3, 4 or 5; and R ^e is Ci-Ce alkyl, Ci-Cs alkylamino, Ca-Ce cycioa!kyiamino (e.g. , isopropyi or cyc!opropyi), C3 cycioa!ky!-Ca-Ce heterocycloamino, Ca-Ce heterocyclo Ca-Ce cycloalkylamino or C3-Cs heterocycloamino.

[0090] Clause 15 relates to the compound of Clause 1 , wherein the compound of formula ( is a compound of the formula:

or a pharmaceutically acceptable salt, polymorph, prodrug, solvate or clathrate thereof; wherein f is 0, 1 , 2, 3, 4 or 5,

[0091] Clause 16 relates to a compound of the formula (II):

or a pharmaceuiicaiiy acceptable salt, polymorph, prodrug, solvate or ciathraie thereof, wherein:

n is an integer from 0 to 3;

X and X ¹ are each, independently, (-CH2-)m, wherein m is 1 or 2;

R ⁵ is, unsubstituted or substituted aikyl:

R ⁷ is H or unsubstituted or substituted aikyl; R ² is unsubstituted or substituted aikyl, unsubstituted or substituted aikenyl, unsubstituted or substituted a!koxy, unsubstituted or substituted hydroxyaikyl, halo, unsubstituted or substituted heterocyciylaikyioxy, -0-(CH2)o- 2p(0)(OR ^s )2, wherein each R ⁸ is independently H or unsubstiuted or substituted alkyi or substituted or unsubstituted aryi;

R ³ is substituted or unsubstituted aikyl; and

R ⁴ is unsubstituted or substituted ary!, unsubstituted or substituted benzthiazole, unsubstituted or substituted benzoxazoie, unsubstituted or substituted benzofuranyl or unsubstituted or substituted indolyl.

[0092] Clause 17 relates to the compound of Clauses 1 -16, wherein the compound has an HIV-1 protease inhibition constant (Ki) of from about 1 fWI to about 200 nM.

[0G93] Clause 18 relates to the compound of Clauses 1 -17, wherein the compound has an antiviral activity in vitro against a wild-type laboratory strain, HIV-1 LAI with half-maximal inhibitory concentration (ICso) of from about 1 f to about 200 nM.

[0094] Clause 19 relates to a pharmaceutical composition comprising a compound Clauses 1 -18 and one or more pharmaceutically acceptable excipients.

[0095] Clause 20 relates to a method for treating an HIV infection comprising administering a therapeutically effective amount of one or more compounds of clauses 1 -18 or a pharmaceutical composition of Clause 8 to a patient In need thereof.

[0098] Clause 21 relates to a compound of Clauses 1 -18 for use as a medicament for treating a patient in need of relief from an HIV infection.