Lactam derivatives as antiarrhythmic agents

摘要

Lactam derivatives of the formula where X is -C(=O)NR3'-, -NR3'C(=O)-, -C(=NCN)NR3'-, -NR3'C(=NCN)-, -CH2NR3'-, -CH(alkyl)NR3'-, -CH(COOalkyl)NR3'-, -CH(CH2OH)NR3 -,-C(CH2Oalkyl)-; R' is halo, alkyl, cycloalkyl, alkyl(cycloalkyl), aryl, (aryl)alkyl, (aryl)alkenyl, (aryl)alkynyl, O-alkyl, O-alkenyl, O-aryl, O-alky(aryl), O-alkyl(heterocyclo), COO-alkyl, C)-alkyl, CO-amino, CO-substituted amino, alkyl-CO-amino, alkyl-CO-substituted amino, NHCO-alkyl, NHCO-aryl, NHCO-alkyl(aryl), NHCO-alkyl(heterocyclo), N(alkyl)CO-alkyl, N(alkyl)CO-aryl, N(alkyl)CO-heterocyclo, N(alkyl)CO-alkyl(aryl), N(alkyl)CO-alkyl(heterocyclo); R2 is hydrogen, alkyl, halo, aryl, (aryl)alkyl, O-alkyl, amino, substituted amino; R3 and R3'are the same or different and are independently selected from hydrogen, alkyl or alkyl(aryl); R4 which can be bonded to a ring carbon or nitrogen, is selected from hydrogen, alkyl, alkenyl, alky(aryl), alkyl(heterocyclo), cycloalkyl, alkyl(cycloalkyl), alkyl-(amino), alkyl-(substituted amino), alkyl-NHCO(alkyl), alkyl-NHCO(aryl), alkyl-NHCO(heterocyclo), alkyl-NHCO(alkylaryl), alkyl-NHCO(alkylheterocyclo); and n is an integer of 0 to 2. These compounds have been found to be useful in the treatment of arrhythmia.