A Simple Synthesis of 2-Substituted 1-Benzothiophenes and 3- Substituted 2H-1-Benzothiopyrans

Abstract

The reaction of (2-mercaptophenyl)methyltriphenylphosphonium bromide (2) with acyl chlorides or α-haloketones in the presence of a base gives rise to 2-substituted 1-benzothiophenes 4 and 3-substituted 2H-1-benzothiopyrans 6 (2H-1-benzothiines), respectively, in moderate to good yields.