| abstract |
New heterocyclylcarboxylic acid derivatives which are acylated in the nucleus, especially benz-acyl-benzimidazole-2-carboxylic acid derivatives of the formula <IMAGE> (I) in which R is a free, esterified or amidated carboxyl group or a free, etherified or esterified hydroxymethyl group, R1 is an aliphatic, cycloaliphatic, aromatic, araliphatic, heterocyclic or heterocyclic-aliphatic radical, R2 is hydrogen or an aliphatic radical and Ph is a 1,2-phenylene group containing the radical R1-C(=O)-, with the proviso that R1 contains at least 2 carbon atoms if Ph is otherwise unsubstituted, R2 is ethyl and R is acetoxymethyl, and salts of such compounds having salt-forming properties, are useful as anti-allergic agents.n[US4141982A] |