Quinazoline derivatives and therapeutic use thereof

1. A method for treating a tumor comprising administering a composition comprising a compound of the formula:

wherein:

n=1 or 2;

when n=1, (R 1 ) 1 is selected from 6-NHCH 2 R 3 , H, 6-nitro, 6-bromo, 6-iodo, 7-fluoro, and 5-methyl;

when n=2, (R 1 ) 2 is selected from 6,7-dimethoxy, 6,7-diethoxy, and imidazol[4,5-g]-; and

wherein R 3 is selected from the group consisting of —CH(CH 3 ) 2 , and Ar, where Ar is selected from

(a) 4-substituted phenyl, wherein the 4-substiuent is selected from —CH(CH 3 ) 2 , —OCH 2 Ph, —OCH 2 CH 2 CH 3 , and -Ph;

(b) 3-substituted phenyl, wherein the 3-substiuent is selected from methoxy, 4-chlorophenoxy, benzyloxy, 4-methoxyphenoxy, 4-methylphenoxy, 3-trifluoromethylphenoxy and methyl;

(c) 2-substituted phenyl, wherein the 2-substiuent is selected from methyl, nitro, and benzyloxy;

(d) disubstituted phenyl selected from 2, 4-dimethoxyphenyl, 2,6-dimethoxyphenyl, 2,5-dimethoxyphenyl, 3,5-dimethoxyphenyl, 2,5-dimethylphenyl, and 4,4-ethylenedioxy;

(e) pyridine-3-yl; and

(f) naphthylen-1-yl, optionally substituted with methoxy in the 2-position; and

(i) when (R 1 ) n is 6-NHCH 2 R 3 , then R 2 is selected from 3-bromophenyl, 3-chloro-4-fluorophenyl, and

(ii) when (R 1 ) 1 is 6-nitro, 6-bromo, 6-iodo, 7-luoro, or 5-methyl, then R 2 is selected from

(a) cyclohexyl;

(b) a substituted phenyl, selected from 2,4,6-trimethylphenyl, 2-fluoro-4-chlorophenyl, 4-fluorophenyl, and 2-chlorophenyl;

(c) CH 2 Ar, wherein Ar is selected from naphthylen-1-yl;

2-trifluoromethylphenyl, and 3-trifluoromethylphenyl;

(d) (CH 2 ) 2 Ar, wherein Ar is selected from phenyl, 3-fluorophenyl, and 4-fluorophenyl;

(e) α-methylbenzyl; and

(f) 4-phenylbutyl;

(iii) when (R 1 ) 2 is 6,7-dimethoxy then R 2 is selected from

(a) (CH 2 ) m Ar, wherein, m is 1, 2 or 4 and, when m=1, Ar is selected from 2-chlorophenyl, 4-chlorophenyl, 2-fluorophenyl, 2-chloro-6-fluorophenyl, and 3-trifluoromethylphenyl; when m=2 then Ar is selected from phenyl and 3-fluorophenyl and when m=4, Ar is phenyl; and

(iv) when (R 1 ) 2 is 6,7-diethoxy, then R 2 is selected from

(a) (CH 2 ) m Ar, wherein, m is 1, 2 or 4 and, when m=1, Ar is selected from 2-chlorophenyl, 4-chlorophenyl, 2-fluorophenyl, 2-chloro-6-fluorophenyl, 3-trifluoromethylphenyl, and 3,5-dimethoxyphenyl; when m=2 then Ar is selected from phenyl and 3-fluorophenyl and when m=4, Ar is phenyl; and

(b) α-methylbenzyl; and

(v) when (R 1 ) 1 is H, then R 2 is selected from

(a) cyclohexyl;

(b) a substituted phenyl, selected from 2,4,6-trimethylphenyl, 2-fluoro-4-chlorophenyl, 4-fluorophenyl, and 2-chlorophenyl;

(c) CH 2 Ar, wherein Ar is selected from naphthylen-1-yl;

2-trifluoromethylphenyl, and 3-trifluoromethylphenyl;

(d) (CH 2 ) 2 Ar, wherein Ar is selected from phenyl, 3-fluorophenyl, and 4-fluorophenyl; and

(e) 4-phenylbutyl;

(vi) when (R 1 ) n is imidazol[4,5-g]- then R 2 is selected from

(a) isopropyl;

(b) phenyl, optionally substituted in the 2-position with a methyl group or in the 4-position with a substituent selected from methoxy, ethyl, isopropyl, and n-butyl;

(c) 2,4,6-trimethylphenyl;

(d) CH 2 Ar, wherein Ar is selected from 3-fluorophenyl and 2,5-difluorophenyl;

(e) (CH 2 ) m Ar, wherein m is 2 or 4 and, when m=2, Ar is selected from phenyl, 3-fluorophenyl, 4-methylphenyl and when m=4, Ar is phenyl; and

(f) α-methylbenzyl.

or a pharmaceutically acceptable salt thereof to a subject in need of such treatment, thereby treating the tumor wherein treating does not embrace prevention.

2. The method of claim 1 , wherein the compound is selected from the group of compounds wherein:

(A) R 2 is 3-chloro-4-fluorophenyl or 3-bromophenyl and (R 1 ) n is 6-NHCH 2 R 3 , wherein R 3 is selected from 4-isopropylphenyl, 2-methylphenyl and 2,4-dimethoxyphenyl;

(B) (R 1 ) 1 is 6-nitro, 6-bromo, 6-iodo, 7-fluoro, or 5-methyl and R 2 is selected from 2-(3-fluorophenyl)ethyl, 2-phenylethyl, naphthylen-1-ylmethyl, 2-trifluoromethylphenylmethyl, 2-(4-fluorophenyl)ethyl, 2-fluoro-4-chlorophenyl, 3-trifluoromethylphenylmethyl, cyclohexyl, 2-chlorophenyl, 2,4,6-trimethylphenyl, α-methylbenzyl, and 4-phenylbutyl;

(C) (R 1 ) 2 is 6,7-dimethoxy or 6,7-diethoxy and R 2 is selected from 2-chlorophenylmethyl and 2-chloro -6-fluorophenylmethyl;

(D) (R 1 ) 2 is imidazol[4,5-g] and R 2 is selected from isopropyl, 4-phenylbutyl, 3-fluorophenylmethyl, 2-(2-fluorophenyl)ethyl, 2-(3-fluorophenyl)ethyl or phenyl that is optionally substituted in the 4-position with a substituent selected from hydrogen, butyl, isopropyl, ethyl, and methoxy; and

(E) (R 1 ) 1 is H, and R 2 is selected from 2-(3-fluorophenyl)ethyl, 2-(4-fluorophenyl)ethyl, 2-fluoro -4-chlorophenyl, 2-chlorophenyl, 2,4,6-trimethylphenyl, and 4-phenylbutyl; and

a pharmaceutically acceptable salt thereof.

3. The method of claim 1 , wherein the compound is selected from the group of compounds wherein:

(A) R 2 is - 3-bromophenyl and (R 1 ) n is 6-NHCH 2 R 3 , wherein R 3 is 2-methylphenyl;

(B) (R 1 ) 1 is H and R 2 is 4-phenylbutyl;

(C) (R 1 ) 1 is 6-iodo and R 2 is 2-phenylethyl;

(D) (R 1 ) 2 is 6,7-diethoxy and R 2 is selected from 2-chlorophenylmethyl and 2-chloro-6-fluorophenylmethyl; and

(E) (R 1 ) 2 is imidazol[4,5-g] and R 2 is isopropyl; and a pharmaceutically acceptable salt thereof.

4. The method of claim 1 , said composition further comprising a pharmaceutically acceptable carrier or diluent.

5. The method of claim 1 , said tumor selected from tumors of the ovary, hormone-dependant tumors of the ovary, tumors of the breast, cervical tumors, tumors of the prostate, tumors of the liver, lung tumors, kidney tumors, colon tumors, pancreatic tumors, brain tumors, stomach tumors and melanoma.

6. A compound of the formula:

wherein:

n=1 or 2;

when n=1 (R 1 ) 1 is selected from 6-NHCH 2 R 3 , H, 6-nitro, 6-bromo, 6-iodo, 7-fluoro, and 5-methyl;

when n=2, (R 1 ) 2 is selected from 6,7-dimethoxy, 6,7-diethoxy, and imidazol[4,5-g]-; and

wherein R 3 is selected from the group —CH(CH 3 ) 2 , and Ar, where Ar is selected from

(a) 4-substituted phenyl, wherein the 4-substiuent is selected from —CH(CH 3 ) 2 , —OCH 2 Ph, —OCH 2 CH 2 CH 3 , and -Ph;

(b) 3-substituted phenyl, wherein the 3-substiuent is selected from methoxy, 4-chlorophenoxy, benzyloxy, 4-methoxyphenoxy, 4-methylphenoxy, 3-trifluoromethylphenoxy and methyl;

(c) 2-substituted phenyl, wherein the 2-substiuent is selected from methyl, nitro, and benzyloxy;

(d) disubstituted phenyl selected from 2, 4-dimethoxyphenyl, 2,6-dimethoxyphenyl, 2,5-dimethoxyphenyl, 3,5-dimethoxyphenyl, 2,5-dimethylphenyl, and 4,4-ethylenedioxy;

(e) pyridine-3-yl; and

(f) naphthylen-1-yl, optionally substituted with methoxy in the 2-position;

and wherein

(i) when (R 1 ) 1 is 6- NHCH 2 R 3 , then R 2 is selected from 3-bromophenyl, 3-chloro-4-fluorophenyl;

(ii) when (R 1 ) 1 is 6-nitro, 6-bromo, 6-iodo, 7-fluoro, or 5-methyl, then R 2 is selected from

(a) cyclohexyl;

(b) a substituted phenyl, selected from 2,4,6-trimethylphenyl, 2-fluoro-4-chlorophenyl, 4-fluorophenyl, and 2-chlorophenyl;

(c) CH 2 Ar, wherein Ar is selected from naphthylen-1-yl;

2-trifluoromethylphenyl, and 3-trifluoromethylphenyl;

(d) (CH 2 ) 2 Ar, wherein Ar is selected from phenyl, 3-fluorophenyl, and 4-fluorophenyl;

(e) α-methylbenzyl; and

(f) 4-phenylbutyl;

(iii) when (R 1 ) 2 is 6,7-dimethoxy, then R 2 is selected from

(a) (CH 2 ) m Ar, wherein, m is 1, 2 or for 4, and, when m=1, Ar is selected from 2-chlorophenyl, 4-chlorophenyl, 2-fluorophenyl, 2-chloro-6-fluorophenyl, and 3-trifluoromethylphenyl; when m=2 then Ar is selected from phenyl and 3-fluorophenyl; and when m=4, Ar is phenyl; and

(b) α-methylbenzyl; and

(iv) when (R 1 ) 2 is 6,7-diethoxy, then R 2 is selected from

(a) (CH 2 ) m Ar, wherein, m is 1, 2 or 4 and, when m=1, Ar is selected from 2-chlorophenyl, 4-chlorophenyl, 2-fluorophenyl, 2-chloro-6-fluorophenyl, 3-trifluoromethylphenyl, and 3,5-dimethoxyphenyl; when m=2 then Ar is selected from phenyl and 3-fluorophenyl and when m=4, Ar is phenyl; and

(b) α-methylbenzyl; and

(v) when (R 1 ) 1 is H, then R 2 is selected from

(a) a substituted phenyl, selected from 2,4,6-trimethylphenyl, 2-fluoro-4- chlorophenyl, 4-fluorophenyl, and 2-chlorophenyl;

(b) (CH 2 ) 2 Ar, wherein Ar is selected from phenyl, 3-fluorophenyl, and 4-fluorophenyl; and(vi)when (R 1 ) 2 is imidazol[4,5-g]-, then R 2 is selected from

(a) isopropyl;

(b) phenyl, optionally substituted in the 2-position with a methyl group or in the 4-position with a substituent selected from methoxy, ethyl, isopropyl, and n-butyl;

(c) CH 2 Ar, wherein Ar is selected from 3-fluorophenyl and 2,5-difluorophenyl;

(d) (CH 2 ) m Ar, wherein m is 2 or 4 and, when m=2, Ar is selected from phenyl, 3-fluorophenyl, 4-methylphenyl and when m=4, Ar is phenyl;

(e) α-methylbenzyl; and

(f) 2,4,6-trimethylphenyl;

or a pharmaceutically acceptable salt thereof, with the proviso that

(a) when R 2 is (CH 2 ) 2 Ph or benzyl, (R 1 ) n is not 6-nitro, 6-bromo, or 6-iodo;

(b) when (R 1 ) 1 is Br, R 2 is not α-methylbenzyl;

(c) when (R 1 ) 2 is 6,7-dimethoxy and R 2 is (CH 2 ) m Ar, then

(i) when m=1, Ar is not 2-chlorophenyl or 3-trifluoromethylphenyl; and

(ii) When m=2, Ar is not phenyl.

7. The compound of claim 6 selected from the group having:

(A) R 2 =3-chloro-4-fluorophenyl or 3-bromophenyl and (R 1 ) 1 =6-NHCH 2 R 3 , wherein R 3 is selected from 4-isopropylphenyl, 2-methylphenyl and 2,4-dimethoxyphenyl;

(B) (R 1 ) 1 =6-nitro, 6-bromo, 6-iodo, 7-fluoro, or 5-methyl and R 2 selected from 2-(3-fluorophenyl)ethyl, , naphthylen-1-ylmethyl, 2-trifluoromethylphenylmethyl, 2-(4-fluorophenyl)ethyl, 2-fluoro-4-chlorophenyl, 3-trifluoromethylphenylmethyl, cyclohexyl, 2-chlorophenyl, 2,4,6-trimethylphenyl, and 4-phenylbutyl;

(C) (R 1 ) 2 =6,7-dimethoxy or 6,7-diethoxy and R 2 selected from 2-chlorophenylmethyl and 2-chloro -6-fluorophenylmethyl;

(D) (R 1 ) 2 =imidazol[4,5-g] and R 2 selected from isopropyl, 4-phenylbutyl, 3-fluorophenylmethyl, 2-(2-fluorophenyl)ethyl, 2-(3-fluorophenyl)ethyl or phenyl that is optionally substituted in the 4-position with a substituent selected from hydrogen, butyl, isopropyl, ethyl, and methoxy; and

(E) (R 1 ) 1 is H, and R 2 is selected from 2-(3-fluorophenyl)ethyl, 2-(4-fluorophenyl)ethyl, 2-fluoro -4-chlorophenyl, and 2-chlorophenyl, 2,4,6-trimethylphenyl; and a pharmaceutically acceptable salt thereof.

8. The compound of claim 6 selected from the group having:

(A) R 2 =3-bromophenyl and (R 1 ) =6-NHCH 2 R 3 , wherein R 3 =2-methylphenyl;

(B) (R 1 ) 2 =6,7-diethoxy and R 2 selected from 2-chlorophenylmethyl and 2-chloro-6-fluorophenylmethyl; and

(C) (R 1 ) 2 =imidazol[4,5-g] and R 2 =isopropyl; and

a pharmaceutically acceptable salt thereof.

9. A pharmaceutical composition comprising a therapeutically effective amount of a compound of claim 6 and a pharmaceutically acceptable carrier or diluent.

10. The compound of claim 6 having an IC 50 of not greater than 10 μM as determined by the Sulforhodamine B (SRB) method, with respect to at least one cell line for a tumor selected from tumors of the ovary, tumors of the breast, cervical tumors, tumors of the prostate, tumors of the liver, lung tumors, kidney tumors, colon tumors, pancreatic tumors, brain tumors, stomach tumors and melanoma.

11. The compound of claim 10 , wherein said cell line is selected from Human OVCAR-3for tumors of the ovary; MCF-7, Hs 578T and MDA-MB-231 for tumors of the breast; HeLa for cervical tumors; PC3 for tumors of the prostate; HepG2 for tumors of the liver; A549 for lung tumors; Caki-1 or UMRC2 for kidney tumors; HT-29 and HCT116 colon tumors;

PANC-1 for pancreatic tumors; U251 for brain tumors; MKN-45 for stomach tumors; and Lox IMVI for melanoma.

12. The compound of claim 10 having an IC 50 of not greater than 1.0 μM as determined by the SRB method.

13. The compound of claim 10 having an IC 50 of not greater than 0.5 μM as determined by the SRB method.