Substituted diphenylmethane derivatives as analgesic or anti-inflammatory agents

Abstract

A compound of formula I or a pharmaceutically acceptable salt thereof ##STR1## where --R.sub.1 is hydrogen or methyl; --X-- is --CO-- or --CH.sub.2 --; --Y-- is >CH--A or its vinylogous group >C.dbd.CH--CH.sub.2 --A, wherein --A is a --NR.sub.4 R.sub.5 group, where each R.sub.4 and R.sub.5, equal or different between them, is C.sub.1 -C.sub.4 -alkyl or a phenyl-substituted C.sub.1 -C.sub.4 -alkyl; or --A is the N-radical of a 5- or 6-membered, uncharged (i.e. neither quaternary nor zwitterionic) monocyclic ring, either aromatic or non-aromatic, said ring containing one N atom, two N atoms, three N atoms or an N/O pair of atoms, all other atoms in the ring being carbon, and said ring being optionally mono- or di-substituted by groups selected from C.sub.1 -C.sub.4 -alkyl, benzyl, 2-furanylmethyl and 2-thienylmethyl; --R.sub.2 is hydrogen or a radical C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, di-(C.sub.1 -C.sub.4 -alkyl)amino, nitro or halogen, said radical being attached at the 2, 3 or 4 substitution positions of the phenyl ring; --R.sub.3 is hydrogen, phenyl, C.sub.1 -C.sub.10 -alkyl, a C.sub.3 -C.sub.10 -alkenyl or alkynyl group with the double or triple bond non-adjacent to the O--C bond, --(CH.sub.2 CH.sub.2 O).sub.n --H with n=1, 2 or 3, --(CHOH).sub.m --H with m=2, 3 or 4, or --when X is CO-- the radical I-bis where Y is defined as above-useful as analgesic or anti-inflammatory agents.

Dependencies are inferred from the claim text.