ANELATED BETTA-CARBOLINES Russian patent published in 2001 - IPC

FIELD: medicine. SUBSTANCE: described are anelated β carbolines of formula I: β wherein is R³ or group(s): -CO-R¹, is R¹- alkoxy; C₁-C₆ is R², H₂, alkyl, C₁-C₄ alkoxy-C₁-C₄ alkyl, A is 5 or 6 membered unsaturated cycle in which 1 or 2 atoms are substituted by N, O and/or S and which is substituted by C₁-C₂ or R⁵; R⁶ and R⁵ are identical or different and are H, R⁶, alkyl, C₁-C₆ alkyl which is substituted by hydroxyl or NR⁷R⁸, C₁-C₆ alkoxyl; phenyl, 5 or 6 membered heteroaryl residue which contains one or two N, O or S atoms, and phenyl and heteroaryl residue is substituted by C₁-C₄ alkyl, C₁-C₄ alkoxyl, halogen or C₁-C₄ together are R⁵ and R⁶ wherein n=4; (CH₂)_n, are h, R⁷ and R⁸ alkyl, acyl, and also isomers, tautomers and salts thereof. Compounds I are useful for improving cognitive functions. EFFECT: improved properties of the title compounds. 5 cl, 17 ex