GB0128499D0 — Therapeutic agents

USPTO Abstract

The present invention provides a pharmaceutical composition providing a compound of formula I or a pharmaceutically acceptable salt thereof in a pharmaceutically acceptable excipient: (I), in which: X and Y independently represent CH or N, with the proviso that if X is CH then Y is also CH; R<SUP>1 </SUP>represents hydrogen, hydrocarbon, a heterocyclic group, halogen, cyano, trifluoromethyl, nitro, -OR<SUP>a</SUP>, -SR<SUP>a</SUP>, -SOR<SUP>a</SUP>, -SO<SUB>2</SUB>R<SUP>a</SUP>, -SO<SUB>2</SUB>NR<SUP>a</SUP>R<SUP>b</SUP>, -NR<SUP>a</SUP>R<SUP>b</SUP>, -NR<SUP>a</SUP>COR<SUP>b</SUP>, -NR<SUP>a</SUP>CO<SUB>2</SUB>R<SUP>b</SUP>, -COR<SUP>a</SUP>, -CO<SUB>2</SUB>R<SUP>a</SUP>, -CONR<SUP>a</SUP>R<SUP>b </SUP>or CR<SUP>a</SUP>-NOR<SUP>b</SUP>; R<SUP>a </SUP>and R<SUP>b </SUP>independently represent hydrogen, hydrocarbon or a heterocyclic group; V and W are independently selected from H, halogen, C<SUB>11-6</SUB>alkyl, OH and C<SUB>-1-6</SUB>alkoxy; Z represents H, halogen, CN, NO<SUB>2</SUB>, CF<SUB>3</SUB>, OCF<SUB>3</SUB>, CF<SUB>2</SUB>H, SCF<SUB>3</SUB>, R<SUP>2</SUP>, OR<SUP>3</SUP>, SR<SUP>3</SUP>, (CH<SUB>2</SUB>)pN(R<SUP>3</SUP>)<SUB>2</SUB>, O(CH<SUB>2</SUB>)pN(R<SUP>3</SUP>)<SUB>2</SUB>, SO<SUB>2</SUB>R<SUP>2</SUP>, SO<SUB>2</SUB>N(R<SUP>3</SUP>)<SUB>2</SUB>, COR<SUP>4</SUP>, CO<SUB>2</SUB>R<SUP>3</SUP>, CON(R<SUP>3</SUP>)<SUB>2</SUB>, NHCOR<SUP>4</SUP>, NR<SUP>1</SUP>(CH<SUB>2</SUB>)<SUB>n</SUB>heteroaryl or O(CH<SUB>2</SUB>)<SUB>n</SUB>heteroaryl the heteroaryl is optionally substituted by one, two or three groups chosen from C<SUB>1-6</SUB>alkyl, benzyl, (CH<SUB>2</SUB>)pN(R<SUP>3</SUP>)<SUB>2</SUB>, halogen and CF<SUB>3</SUB>, R<SUP>1 </SUP>is C<SUB>1-6</SUB>alkyl, where n is 1 or 2 and p is 0, 1 or 2; with the proviso that at least one of V, W and Z is other than H; R<SUB>2 </SUB>represents C<SUB>1-6</SUB>alkyl, C<SUB>3-6</SUB>cycloalkyl, C<SUB>3-6</SUB>cycloalkylC<SUB>1-4</SUB>alkyl, C<SUB>2-6</SUB>alkenyl, C<SUB>2-6</SUB>alkynyl or heteroaryl, any of which may bear a substituent selected from halogen, CN, NO<SUB>2</SUB>, CF<SUB>3</SUB>, OCF<SUB>3</SUB>, CF<SUB>2</SUB>H, SCF<SUB>3</SUB>, OH, C<SUB>1-4</SUB>alkoxy, C<SUB>1-4</SUB>alkoxycarbonyl, amino, C<SUB>1-4</SUB>alkylamino, or di(C<SUB>1-4</SUB>alkyl)amino; R<SUP>3 </SUP>represents H or R<SUP>2</SUP>; or two R<SUP>3 </SUP>groups bonded to the same nitrogen atom may complete a 5-7 membered nonaromatic heterocyclic ring; and R<SUP>4 </SUP>represents R<SUP>3 </SUP>or heteroaryl; the compounds are ligands for GABA-A receptors containing the alpha 5 subtype and thus are useful for enhancing cognition in individuals suffering from conditions such as Alzheimer's Disease.