Isoquinoline derivatives, their preparation and pharmaceutical compositions containing these compounds.

摘要

Intermediate-duration reversible neuromuscular blocking agents of the formula (I) <CHEM> wherein B and C are preferably para or may be meta and are each <CHEM> where W is CH2 or most preferably CH = CH R1, R2, R3 and R4 are the same or different and are each hydrogen or lower alkoxy of 1 to 4 carbon atoms and preferably methoxy, Y is lower alkyl of 1 to 4 carbon atoms and preferably methyl, Z is hydrogen, lower alkyl of 1 to 4 carbon atoms, cyclopentyl, cyclohexyl, benzyl or <CHEM> where ALKYL has 1 to 4 carbon atoms preferably where the O-ALKYL is at the 2, 3, 4 or 5 positions such as 4-methoxy benzyl and is most preferably 3,4-dimethoxy benzyl or 3, 4, 5-trimethoxybenzyl, n is 2, 3 or 4, mos preferably 2 or 3 provided that at least one of R1 to R4 is lower alkoxy and most preferably where R1 and R4 is hydrogen and R2 and R3 are methoxy and X is a pharmaceutically acceptable anion. The neuromuscular blocking agents of formula I are useful for administration to a patient to cause skeletal muscle relaxion during surgery and are normally administered intravenously in a pharmaceutically acceptable carrier.