5-substituted tetrahydrobenzimidazole compounds

Abstract

A process is provided for preparing a tetrahydrobenzimidazole derivative represented by Formula (Ib): ##STR1## wherein Het representa s heterocyclic group which may be substituted with 1 to 3 substituents selected from the group consisting of a lower alkyl group, a lower alkenyl group, a lower alkynyl group, a cycloalkyl-lower alkyl group, an aralkyl group, a lower alkoxycarbonyl group, and a halogen atom; and X.sup.2 represents a single bond connected to the carbon atom of the heterocyclic ring as represented by Het. The process comprises reacting a heterocyclic compound represented by Formula (IIIa): Het--X.sup.2 --H (IIIa) wherein Het and X.sup.2 are as defined above, with a carboxylic acid represented by Formula (II): ##STR2## or a reactive derivative thereof.

Dependencies are inferred from the claim text.