Anti-ulcer pyridyloxy derivatives, their preparation and uses.

摘要

Compounds of formula (I) : <CHEM> [wherein: R<1> is a cyclic amino group, or a dialkylamino group; R<2> is a group of formula -NHCHR<3>R<4>, wherein R<3> and R<4> are each alkyl, aryl or aralkyl, or together form a cycloalkyl group, or R<2> is an aromatic heterocyclic group, or a group of formula -B-S(O)m-R<5>, wherein R<5> is a substituted alkyl group, or an aromatic heterocyclic group; B is an alkylene or alkylidene group; m is 0, 1 or 2; A is a group of formula -CH=CH- or -(CH2)n-, where n is 1, 2 or 3]; and salts thereof have valuable anti-ulcer activity.