Phenylacetamide compounds and an analgesic composition containing them.

摘要

A phenylacetamide compound of the general formula: <CHEM> wherein R1 is an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group having 2 to 4 carbon atoms, R2 is an alkenyl group having 3 to 6 carbon atoms, a cycloalkyl group having 4 to 7 carbon atoms, a cycloalkylalkyl group having 4 to 7 carbon atoms or tetrahydrofurfuryl group, X is an alkoxy group having 1 to 3 carbon atoms, n is an integer of 0 to 2, Y is <CHEM> in which R3 is a hydrogen atom, a hydroxyl group or an alkoxyl group having 1 to 3 carbon atoms, m is zero or 1, l is an integer of 3 to 5; and the pharmaceutically acceptable salts thereof have a strong analgesic activity and hence are useful as thereapeutically active agents for various types of pain.