GB9126260D0 — Therapeutic agents

USPTO Abstract

PCT No. PCT/EP92/02746 Sec. 371 Date May 6, 1994 Sec. 102(e) Date May 6, 1994 PCT Filed Nov. 27, 1992 PCT Pub. No. WO93/12095 PCT Pub. Date Jun. 24, 1993.Compounds of formula: <IMAGE> (I) and pharmaceutically acceptable salts thereof wherein R1 is H, C1-C4 alkyl, C1-C4 alkoxy or CONR5R6; R2 is H or- C1-C4 alkyl; R3 is C2-C4 alkyl; R4 is H, C2-C4 alkanoyl optionally substituted with NR7R8, (hydroxy)C2-C4 alkyl optionally substituted with NR7R8, CH=CHCO2R9, CH=CHCONR7R8, CH2CH2CO2R9, CH2CH2CONR7R8, SO2NR7R8, SO2NH(CH2)nNR7R8 or imidazolyl; R5 and R6 are each independently H or C1-C4 alkyl; R7 and R8 are each independently H or C1-C4 alkyl, or together with the nitrogen atom to which they are attached form a pyrrolidino, piperidino, morpholino or 4-(NR10)-1-piperazinyl group wherein any of said groups is optionally substituted with CONR5R6; R9 is H or C1-C4 alkyl; R10 is H, C1-C3 alkyl or (hydroxy)C2-C3 alkyl; and n is 2, 3 or 4; with the proviso that R4 is not H when R1 is H, C1-C4 alkyl or C1-C4 alkoxy; are selective cGMP PDE inhibitors useful in the treatment of cardiovascular disorders such as angina, hypertension, heart failure and atherosclerosis.