QUINAZOLINES DERIVATIVES FOR ENHANCING ANTITUMOR ACTIVITY

Background of the Invention This invention relates to 2,4-diaminoquinazolineε and their use as sensitizers of tumor cells to anti¬ cancer agents.

In cancer chemotherapy the effectiveness of anticancer drugs is often limited by the resistance of tumor cells. Some tumors such as of the colon, pancreas, kidney and liver are generally innately resistant, and other responding tumors often develop resistance during the course of chemotherapy. The phenomena of multidrug resistance (MOR) is characterized by the tumor cell's cross-resistance to structurally unrelated drugs. The drugs which are the target of resistance include adriaraycin, daunomycin, vinblastine, vincristine, actinomycin D and etoposide. The resistance cells are often associated with over- expression of the mdrl gene. This gene product is a family of 140-220 kd trans-membrane phosphoglycoprotein (P-glycoprotein) which functions as an ATP-dependent efflux pump. Thus, it has been postulated that this efflux mechanism keeps the intracellular level of the anticancer drug low, allowing the tumor cells to survive.

In recent years various substances such as verapamil, nifedipine and diltiazem have been used in j _j i vitro experimental systems to reverse the MDR phenomena. More recently some of these agents have

been tested clinically as MDR reversing agents. Little efficacy has been observed with verapamil or trifluoro- perazine. Thus, there is a need for an effective MDR reversing agent.

The 2,4-diaminoquinazolines are prepared by known methods utilizing 2,4-dichloroguinazolines [Postovskii and Goncharova, Zh. Obshch. Khim. , 32, 3323 (1962)]. Curd et al. (J. Chem. Soc, 1947, 775) reported the synthesis of 2,4-dichloroquinazolines from the corresponding 2,4(IH, 3H)quinazolinedione. The Wellcome Foundation discloses 2,4-diaminoquinazolines of general structure D as antibacterials [GB patent 806772 (1958)3. Hess [US 3,511,836 (1970)] patented compounds of structures E, F, and G as antihypertensive agents. Wijbe [GB patent 1,390,014 (1975)] patented a process for compounds of structure H and these compounds are claimed to be antibacterials. Lacefield [US patent 3,956,495 (1976)] describes compounds of the general formula I as antithrombotic agents. Crenshaw

[US patent 4,098,788 (1978)] patented a process for the production of compounds of formula J. Hess [European Patent 0,028,473 (1981)] describes chloro- and alkoxy- substituted 2,4-diaminoquinazolines of formula K. Ife et al. describe compounds of general structur L as inhibitors of gastric acid secretion [WO 89/0527 (1989)]. Compounds of structures M and N were published as phosphodiesterase inhibitors [Miller, J. Med. Chem., 28, 12 (1985)]. Richter et al. published compounds of structur O as inhibitors of dihydrofolate reductase [J. Med. Chem., 17, 943 (1974)]. In search

of compounds with herbicidal activity Miki et al. reported the synthesis of 2,4-dialkglaminoquinazolines (P) (Chem. Phar . Bull. 30, 2313 (1982)]. Arylazido- prazosin (Q) has been shown to bind to P-glycoprotein [Safa et al., Biochem. Biophys. Res. Comm. 166, 259 (1990)].

H

K

M N

10

20

30

Summary of the Invention

The compound of the present invention are of the formula

or a pharmaceutically acceptable acid addition salt thereof where X and X ¹ are each hydrogen, alkyl of one to four carbon atoms, iodo, bro o, nitro, chloro, fluoro, ethylthio, amino, alkylamino of one to three carbon atoms, methy1- sulfinyl, aminomethyl, (CH ₃ ) ₂ S ^® , dialkylaxinomethyl of three to seven carbon atoms, hydroxymethyl, morpholino, thio- morpholino, benzoylamino, substituted benzoylamino wherein said substituent is azido, methoxy, methyl, fluoro, chloro or trifluoromethyl, alkanoylamino having two to four carbon atoms, 4-methylpiperazino, piperazino, piperidino, pyrroli- dino, dialkylamino of two to six carbon atoms or alkoxy of one to four carbon atoms; X ² is hydrogen, alkyl of one to four carbon atoms or alkoxy of one to four carbon atoms; X and X ¹ together are ethylenedioxy or methylenedioxy; R _x is alkyl having one to four carbon atoms, cycloalkyl of three to seven carbon atoms, alkoxyalkyl said alkoxy having one to three carbon atoms and said alkyl having two to three carbon atoms or benzodioxan-2-ylmethyl; Rj is hydrogen, alkyl of one to eight carbon atoms or benzyl; Rj and R ₂ when taken together with the nitrogen atom to which they are attached form

(a) a moiety of the formula

where Q is hydrogen, alkoxy of one to three carbon atoms, hydroxy, alkanoyla ino having two to four carbon atoms, alkyl of one to three carbon atoms, bromo, iodo, chloro, fluoro, nitro, morpholino, amino, alk la ino of one to three carbon atoms or dialkylamino of two to six carbon atoms, Q ¹ is hydrogen, fluoro, chloro, bromo, alkyl having one to three carbon atoms or alkoxy having one to three carbon atoms, Q ² is hydrogen or alkoxy of one to three carbon atoms, Q ¹ and Q ² together are methylenedioxy or ethylenedioxy, R is hydrogen, alkyl having one to four carbon atoms or alkoxy of one to three carbon atoms, jα is an integer of 0-2, p_ is an integer of 1-2, Εc- is hydrogen or dialkoxybenzyl said alkoxy having one to three carbon atoms and R and Rj together are alkylene having one to three carbon atoms,

(b) l, 2, 3, 4-tetrahydro-beta-carbol-2-yl or

(c) piper idino of the formula

•-o -

where e is pyridylmethoxy, alkoxyalkyleneoxy said alkoxy having one to three carbon atoms and said alkylene having two to three carbon atoms or benzoxazol-2-ylmethyl (d) octahydroisoindol-2-yl or (e) decahydroisoquinol-2-yl; R ₃ is

(a) cycloalkyl of three to seven carbon atoms,

(b) benzodioxan-2-ylmethyl

(c) aralkyl of the formula

wherein n is an integer of 1 or 0, W is O, S or a chemical bond, A is alkylene of one to four carbon atoms, Y is hydrogen, alkyl of one to three carbon atoms, fluoro, chloro, bromo, hydroxy, alkoxy of one to three carbon atoms, benzyloxy, nitro, dimethylamino or amino, Y ¹ is hydrogen, alkoxy of one to three carbon atoms, chloro, fluoro, hydroxy or benzyloxy, Y ² is hydrogen or alkoxy of one to three carbon atoms and Y and Y ¹ together are methylenedioxy or ethylene- dioxy,

(d) aralkyl of the formula

where , is hydroxy, alkoxy of one to three carbon atoms or C ₆ H ₅ (CH ₂ ) _t 0, n is 1, t is an integer of 1 or 0, A is alkylene of one to four carbon atoms, Q ³ and Q ⁴ are each hydrogen or alkoxy of one to three carbon atoms and Q ³ and Q ⁴ together are methylenedioxy or ethylenedioxy,

(e) pyridylalkyl said alkyl having one to four carbon atoms,

(f) alkoxyalkyl said alkoxy having one to three carbon atoms and said alkyl having two to three carbon atoms, (g) indolylalkyl of the formula

where A is alkylene of one to four carbon atoms, Q ³ and Q ⁴ are each hydrogen or alkoxy of one to three carbon atoms and Q ³ and Q ⁴ together are ethylenedioxy or methylenedioxy, (h) tetrahydronaphthalene of the formula

where A is alkylene of one to four carbon atoms, Q ³ and Q ⁴ are each hydrogen or alkoxy of one to three carbon atoms and Q ³ and Q ⁴ together are ethylenedioxy or methylenedioxy;

(i) aralkanol of the formula

OH

.£ -CHgCHCHg—

where W is O, S or a chemical bond and Q ³ is hydrogen or alkoxy of one to three carbon atoms,

(j) 2,3-dihydro-2-hydroxyinden-1-yl, (k) aracycloalkyl of the formula

wherein A is alkylene having one to four carbon atoms, Q ³ and Q ⁴ are each hydrogen or alkoxy having one to three carbon atoms and Q ³ and Q ⁴ together are ethylenedioxy or methylene¬ dioxy,

(1) indene of the formula

wherein Q ³ and Q ⁴ are each hydrogen or alkoxy of one to three carbon atoms and Q ³ and Q ⁴ together are ethylenedioxy or methylenedioxy,

(m) naphthyl or (n) l-methylpyrrol-2-yl;

R* is hydrogen or alkyl of one to eight carbon atoms and R ₃ and R* taken together with the nitrogen atom to which they are attached form

(a) a tetrahydroisoquinoline of the formula

where Q ³ and Q ⁴ are each hydrogen or alkoxy of one to three carbon atoms and Q ³ and Q ⁴ together are methylenedioxy or ethylenedioxy,

(b) piperidino of the formula

wherein R ₈ is benzyl, alkoxyalkyleneoxy said alkoxy having from one to three carbon atoms and said alkylene having two to three carbon atoms or alkyl sulfonamide of the formula

Ro RoS0 ₂ N I-

where Ro is alkyl of one to four carbon atoms

(c) 3-methyl-3-phenylpiperidino or

(d) piperazino of the formula

/—\ *ιo-N -

where Rι ₀ is hydrogen, alkoxycarbonyl of two to six carbon atoms, acyl of one to six carbon atoms, hydroxyalkoxy- carbonyl of three to six carbon atoms, furoyl, benzoxazol-2- yl, pyrimid-2-yl or benzodioxan-2-ylcarbonyl. A preferred group of compounds are those where X and X ¹ are each alkoxy of one to four carbon atoms, X ² is hydrogen, Ri and R ₂ when taken together with the nitrogen atom to which they are attached form a moiety of the formula

where Q ¹ is alkoxy of one to three carbon atoms, R and R ₅ are each hydrogen, p_ is 1, m is 0, R ₃ is aralkyl of the formula

where Y ¹ and Y ² are each methoxy, n is 0 , W is a chemical bond, A is ethylene and R, is hydrogen. Especially preferred within this group are the compounds where X is 6 -methoxy, X ¹ is 7-methoxy, Q is 5-hydroxy, Q ¹ is 6-methoxy, Q ² is hydro¬ gen, Y is hydrogen, Y ¹ is 2-methoxy and Y ² is 3 -methoxy, where X is 6-methoxy, X ¹ is 7 -methoxy, Q is 6-methoxy, Q ^l is 7 -methoxy, Q ² is hydrogen, Y is hydrogen, Y ¹ is 3 -methoxy and Y ² is 4 -methoxy, where X is 6-methoxy, X ¹ is 7 -methoxy, Q is 7-methoxy, Q ¹ is 8-methoxy, Q ² is hydrogen, Y is hydrogen, Y ¹ is 2 -methoxy and Y ² is 3 -methoxy, where X is 6 -methoxy, X ^! is 7-methoxy, Q and Q ² are each hydrogen, Q ¹ is 6-methoxy, Y is hydrogen, Y ¹ is 3-methoxy and Y ² is 4-methoxy, where X is 6-methoxy, X ¹ is 7 -methoxy, Q is 5-methoxy, Q ¹ is 6-methoxy, Q ² is hydrogen, Y is hydrogen, Y ¹ is 3 -methoxy and Y ² is 4 -methoxy, where X is 6-methoxy, X ¹ is 7 -methoxy, Q is 6-methoxy, Q ¹ is 7-methoxy, Q ² is hydrogen, Y is 2-bromo, Y ¹ is 4 -methoxy and Y ² is 5-methoxy, where X is 6-methoxy, X ¹ is 7-methoxy, Q is 6-methoxy, Q ¹ is 8-methoxy, Q ² is hydrogen, Y is hydrogen, Y ¹ is 3 -methoxy and Y ² is 4 -methoxy and where X is 6-methoxy, X ¹ is 7 -methoxy, Q is 7-methoxy, Q ¹ is 8-methoxy, Q ² is hydrogen, Y is hydrogen, Y ¹ is 3-methoxj and Y ² is 4 -methoxy.

A second group of preferred compounds are those where X ¹ and X ² are each hydrogen, Rj and Rj when taken together

with the nitrogen atom to which they are attached form a moiety of the formula

where Q and Q ¹ are each alkoxy of one to three carbon atoms, Q ² is hydrogen, R and R ₅ are each hydrogen, ^~ * is 1, m is 0, R ₃ is aralkyl of the formula

wherein Y ² is hydrogen, n is 0, W is a chemical bond and A is ethylene and R< is hydrogen. Especially preferred within this group are compound where X is 5-methoxy, Q is 6-methoxy, Q ¹ is 7-methoxy, Y is 2-chloro and Y ¹ is hydrogen, where X is 5-chloro, Q is 6-methoxy, Q ¹ is 7-methoxy, Y is 2-chloro and Y ¹ is hydrogen, where X is 5-methyl, Q is 6-methoxy, Q ¹ is 7-methoxy, Y is 3-methoxy and Y ¹ is 4-methoxy and where X is 6-dimethylamino, Q is 6-methoxy, Q ¹ is 7-methoxy, Y is 3-methoxy and Y ¹ is 4-methoxy.

A third group of preferred compounds are those where X and X ¹ are each alkoxy of one to four carbon atoms, X ² is

hydrogen, R _x and R-, when taken together with the nitrogen atom to which they are attached form a moiety of the formula

where Q ² is hydrogen, R ₅ is hydrogen, p_ is 1-2, R ₃ is aralkyl of the formula

where Y and Y ¹ are each alkoxy of one to three carbon atoms, Y ² is hydrogen, n is 0, W is a chemical bond, A is ethylene and R, is hydrogen. Especially preferred within this group are compounds where X is 6-methoxy, X ¹ is 7-methoxy, Q and Q ¹ are each hydrogen, p is 1, R is methoxy, m is 0, Y is 2-methoxy and Y ¹ is 3-methoxy, where X is 6-methoxy, X ¹ is 7-methoxy, Q and Q ¹ are each hydrogen, p is 2, R is hydrogen, in is 1, Y is 3-methoxy and Y ¹ is 4-methoxy and where X is 6-methoxy, X ¹ is 7-methoxy, Q is 7-amino, Q ¹ is hydrogen, R is hydrogen, m is 0, p is 1, Y is 3-methoxy and Y ¹ is 4-methoxy.

A fourth group of preferred compounds those where X and X ¹ are each alkoxy of one to four carbon atoms, R _! and R ₂ when

taken together with the nitrogen atom to which they are attached form a moiety of the formula

where Q and Q ¹ are each alkoxy of one to three carbon atoms, Q ² is hydrogen, R and R ₅ are each hydrogen, p_ is 1, m is 0, R ₃ is aralkyl of the formula

where Q ³ and Q ⁴ are each alkoxy of one to three carbon atoms, R ₇ is methoxy, β is 1, A is methylene and R« is hydrogen.

Especially preferred within this group is the compound where

X is 6-methoxy, X ¹ is 7-methoxy, Q is 6-fluoro, R is methoxy,

Q ³ is 2-methoxy and Q ⁴ is 3-methoxy.

A fifth group of preferred compounds are those where X ¹ is alkoxy of one to four carbon atoms, X ² is hydrogen, R _x and

R ₂ when taken together with the nitrogen atom to which they are attached form a moiety of the formula

where Q and Q ¹ are each alkoxy of one to three carbon atoms, Q ² is hydrogen, p is 1, m is 0, R ₃ is aralkyl of the formula

where Y ² is hydrogen, Q is 0, W is a chemical bond, A is ethylene and R, is hydrogen. Especially preferred within this group is the compound where X is 6-chloro, X ¹ is 7-methoxy, Q is 6-methoxy, Q ¹ is 7-methoxy, R and R ₅ are each hydrogen, Y is 3-methoxy and Y ¹ is 4-methoxy.

The present invention also includes a method of inhibiting a P-glycoprotein in a mammal in need of such treatment which comprises administering to said mammal a P-glycoprotein inhibiting amount of a compound of formula I. Preferred is the method where the mammal is a human suffer¬ ing from cancer and said compound is administered before, with or after the administration to said human of an anticancer effective amount of a chemotherapeutic agent.

Also included is a pharmaceutical composition for administration to a mammal which comprises a P-glycoprotein inhibiting amount of a compound of formula I, a pharmaceuti¬ cally acceptable carrier and, optionally, an anticancer effective amount of a chemotherapeutic agent.

As previously indicated, the compounds of formula I form pharmaceutically acceptable acid addition salts. Said pharmaceutically acceptable acid addition salts include, but are not limited to, those with HCl, HBr, HN0 ₃ , H ₂ S0 ₄ , H ₃ P0 ₄ , CH ₃ SO ₃ H, p-CHsC^SOsH, CH ₃ C0 ₂ H, gluconic acid, tartaric acid, maleic acid and succinic acid. In the case of those compounds of the formula (I) which contain a further basic nitrogen, it will, of course, be possible to form diacid addition salts (e.g., the dihydrochloride) as well as the usual monoacid addition salt.

As one skilled in the art recognized, compounds of formula I have the potential for containing asymmetric carbon atoms. All these potential isomers are considered within the scope of the present invention. The terms "alkyl" and "alkylene" are meant to embrace both straight chained and branched members.

Detailed Description of the Invention Compounds of the present invention are prepared with the reaction of a 2,4-dichloroquinazoline with an equivalent of an appropriate amine, R-R-NH, followed by the reaction of the product, a 2-chloro-4-amino- quinazoline derivative, with a second equivalent of an appropriate amine, R.R.NH.

In a more detailed description of the procedure, one molar equivalent of an optionally substituted

2,4-dichloroquinazoline and one molar equivalent of a tertiary amine-acid scavenger, such as triethylamine, N-methylmorpholine or diethylisopropylamine and one molar equivalent of an amine, R-R-NH, are combined in an anhydrous solvent such as dimethylaceta ide, dioxane or N-methyl-2-pyrrolidone and maintained at from 0°C to about 25°C for a period of 1 to 48 hours.

The reaction mixture can be filtered and the filtrate concentrated to dryness in vacuo, or the reaction mixture can be quenched in water and the intermediate product either filtered or extracted with a water immiscible solvent such as methylene chloride or ethyl acetate. Removal of the extracting solvent provides the desired product. Frequently, the residual can be induced to crystallize by trituration with an organic solvent, and further purified by recrystal- lization or column chromatography.

The second step of the sequence leading to the products of the present invention consists of combining one molar equivalent of the appropriate 2-chloro-4- aminoquinazoline with either two molar equivalents of

an amine, R.R.NH, or one equivalent of said amine and one equivalent of a tertiary amine-acid scavenger as described above in a reaction-inert solvent such as ethoxyethoxyethanol, butanol, amyl alcohol or cyclohexanol for a period of 5 minutes to several hours at reaction temperatures of 100-200°C.

The reaction mixture can be cooled to room temper¬ ature and treated with a 1-N solution of an appropriate acid, such as hydrochloric acid to give a precipitate of the desired product as the hydrochloride salt. Other acids would give the corresponding acid addition salt. In instances where the acid addition salt does not precipitate the free base product can be isolated by chromatographing the crude material on silica gel using an eluant such as chloroform, ethyl acetate, diethyl ether, methanol methylene chloride, ethanol or mixtures thereof and subsequently converted to the acid addition salt product. The products are isolated by removing the eluting solvents in vacuo. Purification of the product can be done by recrystallization.

Generation of the free base from an acid addition salt can readily be carried out by treating an aqueous solution or suspension of the salt with at least one equivalent of an organic or inorganic base followed by extraction of the free base product with a water immiscible solvent such as ethyl acetate or methylene chloride. Removal of the solvent gives the desired base. Compounds of formula I are inhibitors of the functions of P-glycoprotein, particularly human dr 1 protein or P-glycoprotein related and membrane associate proteins which are participating in the

transport of xenobiotics or proteins across membranes e.g., cell membranes of eukariotic and proeukariotic origin e.g., pmfdr, however not exclusive or restricted to these examples.

Compounds enclosed in general formula I are useful in combination chemotherapy of cancer, malaria, viral infections such as AIDS, in therapy of septic shock syndrome or inflammation and may be useful in enhancing the tissue penetration of drugs where the penetration of these xenobiotics is limited due to the presence of P-glycoprotein or P-glycoprotein related functional proteins. Compounds of formula I increase the activity/efficacy of adriamycin, daunomycin, etoposide, epipodophyllotoxin congoners, actinomycin D, emetin, vincristin, vinblastin, chloroquine, antracyclin antibiotics and of drugs which are structurally and functionally related to the above mentioned examples, in particular when the activity of these drugs has been shown to be limited due to the presence and function of P-glycoprotein, e.g. human mdr 1 protein or P-glycoprotein related proteins.

The compounds of the present invention are evaluated as potentiators of chemotherapeutic agents using a Cellular Drug Retention Assay. This assay was designed to study the effect of compounds on cellular retention of radiolabeled drug. In this case 14C-adriamycin retention by multidrug resistant human carcinoma cells, KBV1, is measured. KBV1 cells are routinely grown in tissue culture as monolayers in DMEM high glucose medium containing

1 ug/ml vinblastine 10% heat inactivated fetal calf serum and supplemented with Glutamine, Pen-Strep and Garamycin.

The assay protocol (described below) should be applicable, with minor modifications, to a wide variety of cell lines grown in tissue culture.

Assay Protocol:

(1) Seed replicate 6-well tissue culture plates with 1.2 x 10E6 cells per 2 ml per well in absence of Vinblastine;

(2) Incubate 24 hrs at 37 degrees in humidified incubator (5% C02) ;

(3) Aspirate off the spent media and overlay monolayers with 2 ml/well of fresh medium that is 2 uM in Adriamycin (2 uM unlabeled Adriamycin + 20000 cpm of 14C-Adr) and the test agent at concentrations varying from 0 to 100 uM;

(4) Following incubation for 3 hours at 37 degrees in humidified incubator, remove media and wash mono¬ layers twice with 2 ml of ice-cold buffered saline;

(5) Detach monolayers using 0.5 ml of trypsin/EDTA, collect detached cells and transfer to scintillation vial. Rinse wells once with 0.5 ml of buffered saline and add to same vial containing cells;

(6) Add 5 ml of Beckman Ready-Safe scintillation fluid to vial, vortex and determine radioactivity per sample using a scintillation counter (10 minutes per sample) ; (7) For background control: pre-incubate monolayers at 4 degrees for 15 minutes then remove

media and add fresh ice-cold media containing Adr (see step 3) . Following incubation for 3 hours at 4 degrees remove media and wash monolayers twice with 2 ml ice-cold buffered saline, then proceed as in step 5; (8) Results are expressed as T/C and ED3x values as defined below:

T/C = pmoles Adr per 10E6 cells treated with test agent/ pmoles Adr per 10E6 untreated cells

ED3x ^** = concentration of test agent that produces a 3 fold increase in cellular accumulation of radiolabeled Adr, i.e. T/C = 3. Calculations:

Specific cpm = [sample cpm - background cpm] Specific activity *= [cpm/total cone, of Adr] pmoles Adr ^** = [specific cpm/specific activity] pmoles Adr per 10E6 cells = [ (pmoles Adr per well/number of cells per well) x 10E6 cells]

As previously mentioned compounds of the present invention and salts thereof are useful in potentiating the anticancer effects of chemotherapeutic agents. Such agents can include adriamycin, daunomycin, aclacinomycin A, actinomycin C, actinomycin D, mithramycin, toyomycin, vinblastine, maytansine, bruceantin, ho oharintonin, anguindin, neocarcino- statin, mitomycin C and anthramycin.

The compounds of the present invention can be administered with, 24 hours before or up to 72 hours after the administration of the chemotherapeutic

agents. When administered with said agents, they can be taken either separately or coadministered in the same formulation. The compounds of the present invention whether taken separately or in combination with an anti-cancer agent, are generally administered in the form of pharmaceutical compositions comprising at least one of the compounds of formula I and optionally a chemo- therapeutic agent, together with a pharmaceutically acceptable vehicle or diluent. Such compositions are generally formulated in a conventional manner utilizing solid or liquid vehicles or diluents as appropriate to the mode of desired administration: for oral admini- stration, in the form of tablets, hard or soft gelatin capsules, suspensions, granules, powders and the like, and, for parenteral administration, in the form of injectable solutions or suspensions, and the like.

For use in the potentiation of anti-cancer agents in a mammal, including man, a compound of formula I is given in an amount of about 0.5-100 mg/kg/day, in single or divided doses. A more preferred dosage range is 2-50 mg/kg/day, although in particular cases, at the discretion of the attending physician, doses outside the broader range may be required. The preferred route of administration is generally oral, but parenteral administration (e.g. intramuscular, intravenous, intradermal) will be preferred in special cases, e.g., where oral absorption is impaired as by disease, or where the patient is unable to swallow.

The present invention is illustrated by the following examples, but is not limited to the details or scope thereof.

EXAMPLE 1

2-(N-Methyl-3,4-dimethoxyphenethylamino)-4-(1,2,3,4- tetrahydro-6,7-dimethoxyisoquinol-2-yl)-6,7-dimethoxy- JJ quinazoline hydrochloride (I: X = 6-CH..O; X = 7-CH-O; X ² = H; -^N = 6,7-(CH ₃ 0) ₂ -l,2,3,4-tetrahydroiso- quinol-2-yl; R_ = 3,4 (CH ₃ 0) _phenethyl; and R. = CH.)

A. 2-chloro-4-(1,2,3,4-tetrahydro-6,7~dimethoxy- isoquinol-2-yl)-6,7-dimethoxyquinazoline To 26.59 g of 2,4-dichloro-6,7-dimethoxyquina- zoline and 20.39 g of triethylamine in 250 ml of warm dimethylacetamide was added 23.1 g of 1,2,3,4-tetra- hydro-6,7-dimethoxyisoquinoline in 300 ml of dry dimethylacetamide and the reaction mixture stirred at room temperatures under exclusion of moisture for 16 hours. The precipitate was filtered and the filtrate concentrated to dryness under reduced pressure. The residual product was recrystallized from methanol, 40.6 g, m.p. 183-186 ^β C.

B. 2-(N-methyl-3,4-dimethoxyphenethylamino)-4- (1,2,3,4-tetrahydro-6,7-dimethoxyisoquinol-2-yl)-

6,7-dimethoxyquinazoline hydrochloride

A mixture of 840 mg of the product of Example IA and 1.28 g of N-methyl-3,4-dimethoxyphenethylamine in 1 ml of ethoxyethoxyethanol was stirred under an inert atmosphere for 1 hour at 150°C. The reaction mixture was cooled to room temperature and passed through a column packed with 30 g of silica gel under 2.5 atmosphere of nitrogen pressure with 500 ml of chloroform. The product was eluted with 2% (V:V) methanol in chloroform. The fraction containing the

product (Rf 0.47 10% methanol in chloroform on silica) was concentrated in_ vacuo and the crude residue crystallized from IN hydrochloric acid in methanol- water (1:1, V:V) , 271 mg, m.p. 190-192°C, M ⁺ = 575.40.

EXAMPLES 2-71 Employing the procedure of Example 1 and starting with the appropriate starting reagents, the following compounds were prepared as their hydrochloride salt unless otherwise indicated:

Example 4: X = 6-C ₂ H _ς O; X ¹ » 7-C ₂ H ₅ 0; X ² = H; R, R _ή , R ₅ = H; Q = 6-CH ₃ 0; Q = 7-CH _j O; Q ² = H; A = -(CH^-; = (-); n = 0; Y = 3-CH ₃ 0; Y~ = 4-CH ₃ 0; and Y ² = H; m.p. 121-122 ^β C, M ⁺ 588.30.

Example 5: X = 6-CH ₃ 0; X ¹ = 7-CH..O; X ^{2 «} H; R, ₄ , R ₅ = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² •= H; A = - ⁽ CH ₂ ⁾ ₂ -; W = (-); n = 0; Y, Y ¹ and Y ² = H; m.p. 219-226 ^β C, M ⁺ 500.20. Example 6: X = 6-CH ₃ 0; X ¹ = 7-CH..O; X ² = H; R, R ₄ ,

R _c - H; Q, Q ¹ , Q ² = H; A = -(CH ) -; W = (-) ; n = 0; Y ₍ f 2 "+'- ~~~

Y and Y = H; m.p. 199-201°C, M 440.20.

Example 7: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R, R ₄ ,

R ₅ = H; Q, Q ¹ , Q ² = H; A = -(CH ₂ ) ₂ -; W = (-) ; n = 0; Y = 2-CH ₃ 0; Y ¹ and Y ² = H; m.p. 140-142°C, M ⁺ 471.00.

Example 8: X = 6-CH..O; X ¹ = 7-CH ₃ 0; X ² = H; R, R ₄ ,

R ₅ = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH _j O; Q ² = H; A = - ⁽ CH ₂ ⁾ ₂ -;

_W = (-) ; n = 0; Y = 2-CH ₃ 0; Y and Y ² = H; m.p. 232.5-234°C, M ⁺ 531.00. Example 9: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X = H; R, R ₄ ,

R ₅ = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H;

A = -CH ₂ CH(CH ₃ )-; W = 0; n = 1; Y, Y ¹ and Y ² = H ^; m.p. 105-107°C, M ⁺ 545.00.

Example 10: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² * H ^; R, R ₄ , ₅ = H; Q **= 6-CH ₃ 0; Q* = 7-CH ₃ 0; Q ² = H; A = - ⁽ CH ₂ ⁾ ₂ ^* -

W = 0; n = 0; Y = 2-1; Y ¹ = 4-1; and Y ² = 6-1; m.p. 175-18

Example 11: H; R, R ₄ ,

R ₅ = H; _Q = = - ⁽ CH ₂ ⁾ ₂ ~; w = (-); n m.p. 113-11

533.2. Example 18: X = 6-CH,0; X ¹ = 7-CH-,0; X ² = H; R, ₄ ,

R ₅ = H; Q = 6-CH ₃ 0; Q~ = 7-CH ₃ 0 Q = H; A = -(CH ₂ ) ₂ -; W = (-) ; n = 0; Y = 4-N0 ₂ ; Y ¹ and Y ² = H; m.p. 210-213°C, M ⁺ 546.3.

Example 26: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R, R ₄ , R ₅ = H; Q = 6-CH ₃ 0; Q = 7-CH _? 0; Q ² = H; A = -(CH ₂ ) ₂ -; W = (-) ; r = 0; Y = 3-CH ₃ 0; Y and Y ² = H;

- m.p. 109-lll ^β C, M ⁺ 531.00. Example 27: X = 6-CH ₃ 0; X 1 = 7-CH ₃ 0; X2 = H; R, R ₄ ,

R ₅ - H; Q = 6-CH ₃ 0; Q~ = 7-CH ₃ 0; Q ² = H; A = -(CH ₂ ) ₂ -;

W = (-); n = 0; Y = 2-Br; Y ¹ = 4-CH ₃ 0 and Y ² = 5-CH ₃ 0; m.p. 176-179 ^β C, M ⁺ 641.10.

_I0 Example 28: X, X ¹ , X ² = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0;

Q ² = H; R, R ₄ , R ₅ = H; A = -(CH^-; W = (-) ; n = 0;

Y = 2-CH ₃ 0; Y ¹ « 3-CH ₃ 0; and Y ² = H; m.p. 208-209°C, M ⁺ 501.10.

Example 29: X = 6-CH ₃ 0 X ^{1 *} = 7-CH ₃ 0; X ² = H; R, R ₄ , 15 R ₅ = H; Q = 6-CH ₃ 0 Q ¹ = 7-CH ₃ 0; Q ² = H; A ^~ - -(CH ₂ ) ₂ ~;

W = (-); n = 0; Y = 3-C1; Y ¹ = 4-C1; and Y ² = H; m.p. 135-138°C, M ⁺ 569.30.

Example 30: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R,

R. = H; R_ = 3,4-(CH-0)C,.H,CH--; Q = 6-CH-O; 20 Q = 7-CH ₃ 0; ζT = H; A = -(CH^-; W = (-) ; n = 0;

Y = 3-CH ₃ 0; Y ¹ = 4-CH ₃ 0; and Y ² = H; m.p. 156-159°C,

M ⁺ 711.40.

Example 31: .7,-„C„H ₃ 0 _Λ ; „X2 = H; R, R ₄ , R ₅ = H; Q = ₃ 0; Q = H; A = -(CH ₂ ) ₂ ~

25 W = O; n = 0 d Y ² = H; m.p.

126.5-128°C, M ⁺ 535.00.

Example 32: X = 6-CH.-.0; X = 7-CH ₃ 0; X = H; R, ₄ , ₅ = H; Q = 6-CH ₃ 0; X = 7-CH ₃ 0; Q = H; A = -(CH ₂ ) ₂ -; W = 0; n = 0; Y = 4-C1; Y ¹ and Y ² = H; m.p . 218-219°C,

30 M ⁺ 535.00.

SUBSTITUTE

Example 33 : X = 6-CH ₃ 0; X = 7-CH-O; X = H; R, R ₄ , ₅ = H; Q = 6-CH ₃ 0; Q~ * 7-CH ₃ 0; Q ² = H; A = - (CH^-;

W = 0; n = 0; Y = 4-C1; Y and Y~ = H; m.p. 120-122°C,

M ⁺ 551.30.

.

-;

-

_l0 -

15 -;

-) ; 20

25

30

Example 50: X = 6-F; X ¹ = 7-F; X ² = H; R, R _ή , g = H;

Q = 6-CH ₃ 0; Q ¹ = 7-CH..O; Q ² = H; A = -(CH ₂ ) ₂ -; W = (-) ; n = 0; Y = 3-CH ₃ 0; Y ¹ = 4-CH ₃ 0; and Y ² = H; m.p. 112-114°C, M ⁺ 537.3.

Example 51: X = 6-CHjO; X ¹ = 7-CH-O; X ² = H; R, R ₄ ,

R ₅ = H; Q = 6-CH ₃ 0; Q ^f = 7-CH ₃ 0 Q ² = H; A = -(CH^-; W = (-); n = 0; Y = 4-F; Y ¹ and Y ² = H; m.p. 225-227°C,

M ⁺ 519.30.

Example 52: X * 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R,

R ₅ « H; ₄ = C ₂ H ₅ ; Q = 6-CH ₃ ; Q ¹ = 7-CH ₃ 0; Q ² = H;

A = -CH ₂ -; W = (-); n = 0; Y = 4-C ₂ H ₅ 0; Y ¹ and Y ² = H; m.p. 201-203°C, M ⁺ 545.40.

Example 53: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R,

R ₅ = H; R ₄ = C ₂ H ₅ ; Q, Q ¹ , Q ² = H; A = -CH ₂ -; W = (-) ; n = 0; Y = 4-C ₂ H ₅ 0-; Y ¹ and Y ² = H; m.p. 167-168°C,

M ⁺ 485.30.

Exa ple 54: X = 6-CH _j O; X ¹ = 7-CH ₃ 0; X ² = H; R, R ₄ , R ₅ = H; Q « 6-CH ₃ 0; Q~ = 7-CH ₃ 0; Q ² = H; A = -(CH^-; W = (-); n = 0; Y = 4-OH; Y ¹ and Y ² = H; m.p. 151-153 ^β C, M ⁺ 517.30. Example 55: X = 6-CH ₃ 0; X 1 = 7-CH ₃ 0; X2 = H; R, R ₄ ,

R ₅ = H; Q = 6-N0 ₂ ; Q ¹ , Q ² = H; A = -(CH ₂ ) ₂ -; W = (-) ; n = 0; Y = 3-CH ₃ 0; Y ¹ = 4-CH ₃ 0; and Y ² = H; m.p. 212-214°C, M ⁺ 546.30. Example 56: X, X ¹ = H; X ² = 8-CH ₃ 0; R, R ₄ , R. = H;

Q = 6-CH ₃ 0; Q ¹ = 7-CH. _j O; Q ² = H; A = -(CH ₂ ) ₂ -; W = (-) ; n = 0; Y = 2-CH ₃ 0; Y ¹ = 3-CH ₃ 0; and Y ² = H; m.p. 90-92°C (free base), M ⁺ 531.30.

Example 57: X = 6-CH ₃ ; X ¹ , X ² = H; R, R ₄ R^ = H; Q « 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; A = -(CH^-; W = (-) ; n = 0; Y == 2-C1; Y ¹ and Y ² = H; m.p. 212-214°C,

M ⁺ 489.00

Example 58: X = 6-CH ₃ <D X ¹ = 7-CH ₃ 0; X ² = H; R, R ₄ ,

R ₅ = H; Q = 6-CH ₃ 0; Q*, Q ² = H; A = -(CH^-; W = (-) ; n = 0; Y = 3-CH ₃ 0 Y ¹ = 4-CH ₃ 0; and Y ² = H; m.p. 160-162°C, M ⁺ 531.00.

Example 59: X = β-CHjO; X ¹ = 7-CH ₃ 0 X ² = H; R, R ₄ ,

R ₅ = H; Q = 5-CH ₃ 0; Cj , Q ² = H; A = -(CH^-; W = (-) ; n = 0; Y = 3-CH ₃ 0; Y ¹ = 4-CH ₃ 0; and Y ² = H; m.p. 197-198.5°C, M ⁺ 531.00.

Example 60: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R, ₄ , ₅ - H; Q = 6-CH ₃ 0; Q = 8-CH ₃ 0, Q = H; A = -(CH ₂ ) ₂ ~; W = (-); n = 0; Y = 3-CH ₃ 0; Y = 4-CH ₃ 0; and Y ² = H; m.p. 146-149 ^C C, M ⁺ 561.30.

Example 68 : X = H; X ¹ = 7-CH ₃ 0; X ² = 8-CH ₃ 0; R, R ₄ ,

R ₅ = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH _j O; Q ² = H; A » - (CH^-;

W = (-) ; n = 0 ; Y = 3-CH ₃ 0; Y = 4-CH ₃ 0; and Y ² = H ; m.p. 138-140°C , M ⁺ 561 . 40.

Example 69 : X = 6-CH ₃ 0; X ¹ = 7-CH-O; X ² = H; R, R ₄ ,

R ₅ = H; Q = 6-CH ₃ 0; Q = 7-CH ₃ 0; Q ² = 8-CH ₃ 0

A = -(CH ₂ ) ₂ -; W = (-); n = 0; Y = 3-CH ₃ 0; Y ¹ = 4-CH ₃ 0; and Y ² = H; m.p. 157-158 ^β C, M ⁺ 591.30.

Example 70: X = H; X ¹ = 7-CH ₃ 0; X ² = 8-CH ₃ 0; R, R ₄ ,

R ₅ » H; Q = 6-CH ₃ 0; Q ¹ = 7-CH-O; Q ² = H; A - -(CH ₂ ) ₂ -;

W = (-); n = 0; Y = 3-CH ₃ 0; Y = 4-CH ₃ 0; and Y ² = H; m.p. 147.5-151°C, M ⁺ 561.40.

Example 71: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0 X ² = H; R, R ₄ ,

R ₅ = H; Q, Q ¹ , Q ² = H; A = -(CH^-; W = (-) ; n = 0;

Y = 3-CH ₃ 0; Y ¹ = 4-OH; and Y ² = H; m.p. 169-171.5°C,

M 487.20

EXAMPLES 72-106 Using the procedure of Example 1, and starting with the requisite reagents, the following compounds were prepared as their hydrochloride salts unless

indicated otherwise:

Q ^J

Example 72: X = 6-CH O; X ¹ = 7-CH ₃ 0; X = H; Q, Q

2 ^{J J}

Q = H;

1 2 1

Example 73: X = 6-CH ₃ 0; X = 7-CH ₃ 0; X = H; Q, Q ,

Q ² = H;

R 5°C 3-NR 4- 22

Example 74: X 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; Q = 6-CH ₃ 0; Q ¹ 7-CH ₃ 0; Q ² = H;

3 4 229°C

Example 75: X = 6-CH. _j O; X ¹ = 7-CH ₃ 0; X ² = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H;

76: X = 6-CH,0; X 7-CH ₃ 0; X" = H; Q, Q ¹ ,

Example 77: X 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ^{2 ~~} H; Q = 6-CH ₃ 0; Q ¹ 7-CH ₃ 0; Q ² = H;

Example 78: X = 6-CH ₃ 0; X 7-CH ₃ CH ₂ CH ₂ 0; X = H;

Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² H;

Example 79: X 6-C ₂ H ₅ 0; X ^A = 7- ^• C ₂ H ₅ 0; X ^~ = H; Q = 6-CH ₃ 0; Q ¹ 7-CH ₃ 0; Q = H;

Example 80: X 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; Q = 6-CH ₃ 0; Q ¹ 7-CH ₃ 0; Q ² = H;

Example 81: X 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; Q = 6-CH ₃ 0; Q ¹ 7-CH ₃ 0; Q ² = H;

'/

R,NR ^■ CH ^■ O m.p 133-135.5°C

M ⁺ 555.00

1 2 Example 82: X = 6-CH ₃ 0; X = 7-CH ₃ 0; X = H;

Q = 6-CH ₃ 0; Q ¹ = 7-CH. _j O; Q ² = H;

Example 83: X = 6-CH ₃ 0; X ¹ = 7-CH..O; X ^~ H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H;

R 221°C (dec)

Example 84: X = 6-CH ₃ 0; X ^x = 7-CH ₃ 0; X = H; Q = 6-CH ₃ 0; Q ¹ - 7-CH ₃ 0; Q ² = H;

R 188°C

Example 85: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X = H;

Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0;. Q ² = H;

R 5-204.5°C

Example 86: X, X ¹ , X ² = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H;

M ⁺ 484.53

Example 87: X = 6-CH ₃ 0; X 7-CH ₃ 0; X = 8-CH ₃ 0;

Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H;

Example 88: X, X , X = H; Q = 6-CH,0; Q » 7-CH 0;

2

Q = H;

Example 89: X = 6-CH ₃ 0 X ¹ = 7-CH ₃ 0; X ² = H;

Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H;

Example 90: X = 6-CH ₃ 0; = 7-CH.-0; X~ = H; Q = 6-CH ₃ 0; Q ¹ 7-CH ₃ 0; Q' = H;

Example 91: X = 6-CH ₃ 0; X ¹ - 7-CH ₃ 0; X = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H;

Example 92: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X = H ^; Q = 6-CH..O; Q ¹ = 7-CH ₃ 0; Q ² = H;

Example 93: X = 6-CH ₃ ; X ¹ , X ² = H; Q = 6-CH. _j O; Q ¹ = 7-CH ₃ 0; Q ² = H;

1 2 1 Example 94: X = 6-CH ₃ 0; X = 7-CH ₃ 0; X = H; Q, Q ₍

Q ² = H;

R ₃ NR ₄ = C ₂ H ₅ 0C0N Γ. ΛN- m.p. 155-156°C M ⁺ 478.00

Example 95: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; Q, Q ¹ , Q ² = H;

Example 96: X 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; Q = 6-CH ₃ 0; Q ¹ 7-CH ₃ 0; Q ² = H;

R,NR. C ₂ H ₅ 0(CH ₂ ) ₂ NH m.p. 185-186°C 3 4 M ⁺

Example 97: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ^' = H;

Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H;

Example 98: X 6-CH ₃ 0; X 7-CH ₃ 0; X' = H; Q = 6-CH ₃ 0; Q ¹ 7-CH ₃ 0; Q~ = H;

Example 99: X 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; Q = 6-CH-0; Q ¹ 7-CH ₃ 0; Q ² = H;

Example 100: X = 6-CH-O; X ¹ = 7-CH ₃ 0; X ² = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H;

R ₃ NR ₄ 30°C

Example 101: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; Q = 6-CH ₃ 0; Q ¹ = 7-O-L..0; Q ² = H;

SUBS

Example 102: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X = H; Q, Q ,

Q = H;

Example 103: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; Q = H; Q ¹ = 7-CH ₃ 0; Q ² = 8-CH ₃ 0;

1 2

Example 104: X = 6-CH ₃ 0 X = 7-CH ₃ 0; X - H;

Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H;

R,NR, = -C0N(CH ₂ ) ₂ NH M 548.30 3 4 CH.,

Example 105 : ^" X = 6-CH ₃ 0 ; X ¹ = 7-CH ₃ 0 ; X ² = H; Q = 6-CH ₃ 0 ; Q ¹ = 7-CH ₃ 0; Q ² = H;

R ₃ NR ₄ = (CH ₃ ) ₂ ?C ^H CH ₂ OCON / ^~ N- m.p. 168-170°C

M ⁺ 582. 30

Example 106 : X = 6-CH ₃ 0; X ¹ = 7-CH O; X ² = H;

Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H;

R ₃ NR ₄ = (CH ₃ OCH ₂ CH ₂ ) ₂ ) - m.p .

M 513 . 00

EXAMPLE 107 2-(3,4-Dimethoxyphenethylamino)-4-(2,3,4,5-tetrahydro— 2-benzoazep-2-yl)-6,7-dimethoxyquinazoline hydro- chloride (I: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; ^N = 2,3,4,5- tetrahydro-2-benzazep-2-yl; R ₃ = 3,4-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ -; and R ₄ = H)

A. 2-chloro-4-(2,3,4,5-tetrahydrobenzazep-2-yl)-6,7- dimethoxyquinazoline

A mixture of 1.0 g of 2,3,4,5-tetrahydro-2- benzazepine, 1.76 g of 2,4-dichloro-6,7-dimethoxyquina- zoline and 1.0 g of triethylamine in 25 ml of methylene chloride was stirred at room temperature under nitrogen for three hours. An additional 290 mg of the benzazepine was added and stirring continued over 48

hours. The reaction mixture was diluted with 100 ml of methylene chloride and the organic solution washed successively with IN hydrochloric acid (3 x 75 ml) , JJ water (2 x 75 ml) , a saturated sodium bicarbonate solution (2 x 75 ml) , water (2 x 75 ml) and a brine solution (1 x 75 ml) . The organic phase was separated, dried over sodium sulfate and concentrated to a foam, 2.15 g. The residue was treated with reluxing methanol and cooled in a refrigerator. The resulting solids were filtered and dried, 1.84 g. A small sample was recrystallized from methanol, m.p. 164-165°C. B. 2-(3,4-dimethoxyphenethylamino)-4-(2,3,4,5-tetra- hydrobenzazep-2-yl)-6,7-dimethoxyquinazoline hydrochloride

A mixture of 1.109 g of the product of Example 107A, 543 mg of 3,4-dimethoxyphenethylamine and 387 mg of diisopropylethylamine in 1.1 g ethoxyethoxyethanol was stirred under nitrogen at 170°C for five hours. The reaction mixture was cooled to room temperature and diluted with 5 ml of methylene chloride. This solution was chromatographed without pressure on 60 g of silica gel using methylene chloride as the eluant, taking 15 fractions. Fractions 3-6 were combined and the elution continued under pressure with 2% methanol-methylene chloride, taking 14 fractions. Fractions 8-12 were combined and concentrated to give an oil which was dissolved in 6 ml of IN hydrogen chloride in methanol. The resulting solids were filtered and dried, 679 mg, m.p. 226-228°C. Fractions 3-6 when carried through the same procedure gave 170 mg of the hydrochloride salt.

Anal. Calc'd for C3 ₀ ^H 34 ^N 4 ^O 4 ^* HCl: C, 65.4; H,

10.2; N, 6.4..

Found: C, 65.3; H, 10.1; N, 6.5. EXAMPLES 108-138

Employing the procedure of Example 107 and starting with the appropriate reagents, the following compounds were prepared:

Example 108: X = 6-CH ₃ 0; X ¹ = 7-CH. _j O; X ² = H; R,

R ₅ = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H, m = 0; p = 1;

m.p. 205-206°C M ⁺ 531.2.

,J. - _Λτ , _Λ „z

Example 109: X = 6-CH-O; X = 7-CH ₃ 0 X = H; R, ₅ = H; Q, Q ¹ = H; Q ² = 8-CH ₃ 0; m = 0; p = 1;

R _{3 4} N = 3,4-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 187-188°C M ⁺ 531.0.

Example 110: X = 6-CH ₃ ; X ¹ , X ² = H; R, R ₅ = H;

Q = 6-CH ₃ 0; Q ¹ = 7-CH.jO; Q ² = H; m = 0; p = 1;

R-R.N = 2-C1C-H. (CH-)-NH 3 4 6 4 2 2 m.p. 156-157°C M ⁺ 489.0.

Example 111: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R, R ₅ = H; Q = 5-CH ₃ 0; Q ¹ = 6-CH ₃ 0; Q ² = H; m = 0; p = 1 ; R ₃ R ₄ N = 3,4-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 175-177°C

M ⁺ 561.1. Example 112: X = 6-C1; X ¹ , X ² = H; R, R _§ = H; Q = 6-CH ₃ 0; Q ¹ - 7-CH ₃ 0; Q ² = H; m = 0; p = 1; _{3 4} N = 2-ClCgH ₄ (CH ₂ ) ₂ NH m.p. 241-242°C

M ⁺ 509.03.

Example 113: X = 5-C1; X ¹ , X ² = H; R, R _g = H;

Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; = 0; p = 1;

R-R.N = 2-ClC _c H. (CH-)-NH 3 4 6 4 2 2 m.p. 166-167°C

M ⁺ 509.0. Example 114: X = 6-CH. _j O; X ¹ = 7-CH ₃ 0; X ² = H; Q = 5-CH ₃ 0; Q ¹ » 6-CH ₃ 0; Q ² = H; R, R ₅ = H; m = 0; p = 1; R _{3 4} = 2,3-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 209°C

M ⁺ 561.27.

Example 115: X = 5-C1; X ¹ , X ² - H; R, ₅ ^* = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; m = 0; p = 1; ₃ R ₄ N = 3,4-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 106-107°C

M ⁺ 535.3. Example 116: X = 5-C1; X ¹ , X ² * H; R, R ₅ = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; m = 0; p = 1; ₃ R ₄ N = 2,3-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 200-202°C

M ⁺ 535.20. Example 117: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R, R ₅ = H; Q = H; Q ¹ = 7-CH ₃ 0; Q ² = 8-CH ₃ 0; m - 0; p = 1; R ₃ R ₄ ^~ - 2,3-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 194.5-195.5°C

M ⁺ 561.0. Example 118: X = 5-C1; X ¹ , X ² = H; R, R _ς = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; m = 0; p = 1; R ₃ R ₄ N = 3,4-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 197-198°C

M ⁺ 531.4. Example 119: X = 6-C1; X ¹ , X ² = H; R, R ₅ = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; - 0; p = 1; R ₃ R ₄ N = 2,3-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 214-215°C

M ⁺ 535.40. Example 120: X = 5-C1; X ¹ , X ² = H; R, R ₅ = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; m = 0; p = 1; R ₃ R ₄ N = 2,3-(CH ₃ 0) ₂ C _g H ₃ (CH ₂ ) ₂ NH m.p. 178-179°C

M ⁺ 531.4.

Example 121: X = 5-C1; X , X ² = H; R, R = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; = 0; p = 1; R ₃ R ₄ N = 2-ClCgH ₄ (CH ₂ ) ₂ NH m.p. 178-179°C

M ⁺ 505.3. Example 122: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R, ₅ = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; m = 0 ; p = 1 ; R _{3 4} N = 2-I-4,5-(CH ₃ 0) ₂ CgH ₂ (CH ₂ ) ₂ NH m.p. 216-217°C (free base)

M ⁺ 687.0. Example 123: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R, R ₅ = H; Q = H; Q ¹ = 7-CH ₃ 0 Q ² = 8-CH ₃ 0; m = 0; p = 1; R _{3 4} N ^* = 2-ClC _g H ₄ (CH ₂ ) ₂ NH m.p. 197-198°C

M ⁺ 547.1. Example 124: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R = CH ₃ 0; R ₅ = H; Q ^* = 6-F; Q ¹ , Q ² = H; m = 0; p = 1 ; R ₃ R ₄ N = 3,4-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 215-217°C

M ⁺ 548.6. Example 125: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ^{2 ~} H; R, R ₅ = H; Q, Q ¹ = H; Q ² = ⁷ ~CH ₃ ; = 0; p = 1; R ₃ R ₄ N = 3,4-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 182-183°C

M ⁺ 515.3. Example 126: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R, R ₅ = H; Q, Q ¹ , Q ² = H; m = 1; p = 1; R _{3 4} N = 2,3-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 222-223°C

M ⁺ 515.3.

Exa ple 127: X = 6-CH ₃ 0; X = 7-CH..0; X ² = H; R, R ₅ = H; Q, Q ¹ , Q ² = H; m = 1; p = 1;

R R ₄ = 2-ClC _g H ₄ (CH ₂ ) ₂ NH m.p. 218-219°C M ⁺ 489.2.

Example 128: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² - H; R,

R ₅ = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; m = 0; p = 1;

R ₃ R ₄ N = 3,4,5-(CH ₃ 0) ₃ CgH ₂ (CH ₂ ) ₂ NH m.p. 142-150°C

M ⁺ 591.4.

Example 129: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R = H;

R ₅ = 3,4-(CH ₃ 0) ₂ CgH ₃ CH ₂ ; Q = 6-CH ₃ 0 Q ¹ = 7-CH ₃ 0;

Q = H; m = 0; p = 1; R ₃ R ₄ N = 2-ClCgH ₄ (CH ₂ ) ₂ NH m.p. 234-235°C

M ⁺ 671.2.

Example 130: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ^{2 *} -= H; R = H;

R ₅ = 3,4-(CH ₃ 0) ₂ CgH ₃ CH ₂ ; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; ζT = H; m = 0; p = 1; R ₃ R ₄ = 2,3- ⁽ CH ₃ 0) ₂ ^C ₆ ^H ₃ ( ^CH ₂ ⁾ 2 ^NH m.p. 144-145°C

M ⁺ 697.3.

Example 131: X = 6-CH-O; X ¹ = 7-CH ₃ 0; X ² = H;

R = CH ₃ 0; R ₅ = H; Q, Q , Q ² = H; m = 0; p = 1;

R ₃ R ₄ N = 2,3-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 120-123°C

M ⁺ 531.2.

R ₃ R ₄ N = 3,4-(CH ₃ 0) ₂ C ₆ H ₃ (CH ₂ ) ₂ H m.p. 206-208°C

M ⁺ 531.6.

Example 133: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R, ₅ = H; Q, Q ¹ , Q ² = H; m = 1; p -= 1;

R ₃ R ₄ N = 3,4-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 217-219°C M ⁺ 515.5.

Example 134: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = ^■ H; R, R ₅ = H; Q, Q ² = H; Q ¹ = 7-NH ₂ ; m = 1; p = 1; R ₃ R ₄ N = 3, -(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 213-217°C (free base) M ⁺ 530.2.

Example 135: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R = H; R-. = 3,4-(CH ₃ 0) ₂ CgH ₃ CH ₂ ; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; m = 0; p = 1; R^N = 3,4- (CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 208-209°C

M ⁺ 711.4. Example 136: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R = CH ₃ 0; R ₅ = H; Q = H; Q ¹ = 7-CH ₃ 0; Q ² = 8-CH ₃ 0; m - 0; p = 1; R ₃ R ₄ = 3,4- (CH ₃ 0) ₂ C _g H ₃ CH(CH ₃ 0) (CH ₂ ) ₂ NH m.p. 159-161°C (free base)

M ⁺ 621.4. Example 137: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R, R ₅ = H; Q = 5-OH; Q ^{1 *} = 6-CH ₃ 0; Q ² = H; m = 0; p = 1; R ₃ R ₄ N = 2,3-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 190-200°C

M ⁺ 547.0. Example 138: X = 6-CH ₃ 0 X ¹ = 7-CH ₃ 0; X ² = H; R, R ₅ = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; m =- 0; p = 1; R ₃ R ₄ N = 2-Br-4,5-(CH ₃ 0) ₂ CgH ₂ (CH ₂ ) ₂ NH m.p. 176-179°C

M ⁺ 641.0.

Example 139: X = 5-CH ₃ X ¹ , X ² = H; R, R ₅ = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; m = 0; p = 1;

R ₃ R ₄ N = 3,4-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH m.p. 141-142°C M ⁺ 515.0.

EXAMPLES 140-147 Using the procedure of Example 107 and starting with the necessary reagents, the following compounds were prepared:

Example 140: X-CH ₃ 0; X ¹ - 7-CH ₃ 0; X ² = H; ^R 1 ^R 2 ^N

m.p. 204-207°C M ⁺ 545.2.

Example 141: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R ₁ R ₂ N

C ₂ H ₅ 0(CH ₂ )0- N-; R ₃ R ₄ = 2,4- (CH ₃ 0) ₂ CgH ₃ CH ₂ NH;

m.p. 117-119° (free base) M ⁺ 527.0. Example 142: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R-^N

R _{3 4} N = 2,4-(CH ₃ 0) ₂ CgH ₃ CH ₂ NH; m.p. 146-147°C (free base) M ⁺ 621.4.

Example 143: X, X .1 , „ X2 = H; -^N = CgH-^ H-; ₃ R ₄ N = CgH _ι;L NH; m.p. 162-165°C (free base)

M 325.0.

Example 144: X = 6-CH ₃ 0; X ¹ = 7-CH.-0; X = H; R^N

m.p. 215-217°C (free base) M ⁺ 591.0.

Example 145: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R-^

-N- CH ₂ 0- R-R.N = CH I _3A CCOONN r ^~ \ 3 4 _Λ m.p. 220°C; M ⁺ 507.0.

Example 146: X = 6-N(CH ₃ ) ₂ ; X ^* = H; R- _j ^N =

R _{3 4} N = 3,4-(CH ₃ 0) ₂ CgH ₃ (CH ₂ ) ₂ NH;

m.p. 193.5-194.5°C M ⁺ 544.3. Example 147: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R^N =

m.p. 156-158°C M ⁺ 579.3.

PREPARATION A

Employing the procedure of Example IA and starting with appropriate reagents, the following intermediates were prepared:

Compound 1: X = 6-CH ₃ 0; X ¹ = 7-C ₃ H _? 0; X = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; R, R ₅ = H; m.p. 120-121°C.

Compound 2: X = 6-C ₂ H ₅ 0; X ¹ = - 7-C ₂ H ₅ 0; X ² = H;

Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; R, R ₅ - n; m.p.

161-162°C.

Compound 3: X « 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; Q, Q ¹ ,

Q ^{2 *} = H; R, Rς = H; m.p. 169-171°C.

Compound 4: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H;

Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; R, R ₅ = H; m.p.

183-186°C.

Compound 5: X, X ¹ , X ² = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0;

Q ² = H; R, R ₅ = H;; m.p. 126-126.5°C.

Compound 6: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = 8-CH..0; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; R, R ₅ = H; m.p.

130-131°C.

Compound 7: X = 6-CH...0 X" -= -7-C-H--O;- X --- ^■ = H;

2

Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0 Q = H;

R ₅ = 3,4-(CH ₃ 0) ₂ CgH ₃ CH ₂ R = H; m.p. 154-156.5°C.

Compound 8: X = 6-CH ₃ 0 X ¹ = 7-CH ₃ 0; X ² = H; Q = H;

Q ¹ = 7-CH ₃ 0; Q ² = 8-CH ₃ 0; R, R-. = H; m.p. 162-163 ^β C. Compound 9: X = 6-CH ₃ 0; X ¹ , X ² = H; Q = 6-CH ₃ 0;

Q ¹ = 7-CH ₃ 0; Q ² - H; R, R ₅ = H; m.p. 132-134°C.

Compound 10: X = 6-CH ₃ ; X ¹ , X ² = H; Q = 6-CH...0;

Q ¹ = 7-CH ₃ 0; Q ² = H; R, R ₅ = H; m.p. 133-135°C.

Compound 11: X, X ¹ , X ² = H, Q, Q ¹ , Q ² = H; R, R ₅ = H; m.p. 130-131°C.

Compound 12: X = 6-F; X ¹ = 7-F; X ² = H; Q = 6-CH..0;

Q ¹ = 7-CH ₃ 0; Q ² = H; R, R ₅ = H; m.p. 219-220°C.

Compound 13: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ^{2 *■} * H; Q,

Q ² = H; Q ¹ = 7-N0 ₂ ; R, R ₅ - H; m.p. 210-212°C. Compound 14: X, X ¹ = H; X ² = 8-CH ₃ 0; Q ^« 6-CH ₃ 0;

Q ¹ = 7-CH ₃ 0; Q ² = H; R, R ₅ = H; m.p. 147-149°C.

Compound 15: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H;

Q = 6-CH ₃ 0; Q ¹ , Q ² = H; R, R ₅ = H; m.p. 181-184°C.

Compound 16: X •= 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; Q = 5-CH ₃ 0; Q ¹ = 6-CH ₃ 0; Q ² = 7-CH ₃ 0; R, R ₅ = H; m.p.

152-153°C.

Compound 17: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H;

Q = 5-CH ₃ 0; Q ¹ , Q ² = H; R, R ₅ = H; m.p. 144.5-146°C.

Compound 18: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; Q = 7-NH ₂ ; Q ¹ , Q ^2' = H; R, R ₅ = H; m.p. 123-126°C.

Compound 19: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² - H;

Q = 7-C1; Q ¹ , Q ² = H; R, R ₅ = H; m.p. 187-189°C.

Compound 20: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = 8-CH ₃ 0; R = C^O;

R ₅ = H; m.p. 150-153°C.

Compound 21: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; Q = H;

Q ¹ = 7-CH ₃ 0; Q ² = 8-CH ₃ 0; R = CH..O; R ₅ = H; m.p.

138-140 ^β C. Compound 22: X = 6-CH ₃ 0; X ¹ = 7-CH..O; X ² = H;

Q = 6-CH ₃ 0; Q ¹ , Q ² = H; R = C ₂ H ₅ 0; R ₅ = H; m.p.

140-142°C.

Compound 23: X = 6-CH..0; X ¹ = 7-CH ₃ 0; X ² = H; Q = H;

Q ¹ = 7-CH ₃ 0; Q ² = 8-CH ₃ 0; R - C ₂ H,-0; R ₅ = H; m.p. 161-164°C.

Compound 24: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H;

Q = 6-CH ₃ 0; Q ¹ = H; Q ² = 8-CH ₃ 0; R, R ₅ = H; m.p.

159-161°C.

Compound 25: X = H; X ¹ = 7-CH ₃ 0; X ² = 8-CH..0; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0 Q ² = H; R, R ₅ = H; m.p.

143-143.5°C.

1 2

Compound 26: X = 6-CH ₃ 0; X = 7-CH ₃ 0; X = H;

Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = 8-CH ₃ 0; R, R _g = H; m.p.

152-153°C.

1 2 Compound 27: X = 6-CH ₃ 0; X = 7-CH ₃ 0; X = H;

Q = 7-CH ₃ ; Q ¹ , Q ² = H; R, R _g = H; m.p. 169-170°C.

Compound 28: X = 5-Cl; X ¹ , X ² = H; Q = 6-CH ₃ 0;

Q ¹ = 7-CH-O; Q ² = H; R, R _ς = H; m.p. 161-162°C.

Compound 29 : X = 6-Cl ; X~ , X~ = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q ² = H; R, ₅ = H ; m. p . 144-145°C .

Compound 30: X = 6-CH ₃ 0 X ^* = 7-CH ₃ 0 X ² = H;

Q - 5-CH ₃ 0; Q ¹ = 6-CH ₃ 0; Q ² = H; R, R ₅ = H; m.p. 138.5-139°C. Compound 31: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0 X ² = H;

Q = 5-OH; Q ¹ = 6-CH ₃ 0; Q ² = H; R, R,. = H; m.p. 221-223°C.

Compound 32: X = 5-CH ₃ ; X ¹ , X ² = H; Q = 6-CH.-.0;

Q ¹ - 7-CH ₃ 0; Q ² - H; R, R ₅ = H; m.p. 174-175°C. Compound 33: X = 6-CH. _j O; X ¹ = 7-CH ₃ 0; X ² = H; Q = H;

Q ¹ = 7-CH ₃ 0; Q ² = 8-CH ₃ 0; R ^* = CH ₃ 0; R,. = H; m.p. 138-140°C.

Compound 34: X = 6-CH ₃ 0; X ¹ = 7- -L-.0; X ² = H; Q,

Q ¹ = H; Q ² = 8-CH ₃ 0; R, ₅ = H; m.p. 204-205°C. Compound 35: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; Q, Q ¹ ,

Q ² = H; R = CH ₃ 0; R _f . = H; m.p. 162-165°C.

Compound 36: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; Q = 6-F;

Q ¹ , Q ² = H; R = CH ₃ 0; R ₅ = H; m.p. 155-157°C.

Compound 37: X = 6-N(CH ₃ ) _2? X ¹ , X ² = H; Q = 6-CH ₃ 0; Q ¹ = 7-CH ₃ 0; Q = H; R, R _j = H; amorphous.

Compound 38: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0 X ² = H; Q = 6-F;

Q ¹ , Q ² = H; R = CH ₃ 0 R ₅ = H; m.p. 195-197°C.

PREPARATION B

The procedure of Example IA was repeated starting with the required materials to give the following intermediates :

Compound 39 : X = 6-CH ₃ 0 ; X ¹ = 7-CH ₃ 0 ; X ² - H; R _χ R ₂ N

Compound 40 : X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H;

Compound 41 : X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; R ₁ R ₂ N=

Co pound 42: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X = H; R-^N

COO-

Compound 43: X = 6-CH ₃ 0; X ¹ = 7-CH. _j O; X ² = H; R^N

Compound 4

Co pound 45: X = 6-CH ₃ 0; X ¹ = 7-CH ₃ 0; X ² = H; JRJN

Compound 46: X, X ¹ , X ² = H, R^N = CgH ₁₁ NH; m.p. 85-89°C.