Benzazolin-2-thiones in the michael reaction. 1. Reaction of benzothiazolin- and benzoxazolin-2-thiones with acrylonitrile, acrylamide, and methylacrylate in the presence of acid catalysts

Abstract

The reaction of benzothiazolin- and benzooxazolin-2-thiones with acrylonitrile, acrylamide, and methylacrylate under conditions of acid catalysis takes place at the sulfur atom. The formation of minor amounts of N-derivatives is attributed to isomerization of the principal reaction products.