A Novel Synthesis of [1]Benzothieno[3,2-b][1]benzofuran

Abstract

A new synthesis of the title compound based on the formation of the furan ring in the key step was elaborated. Methyl 2-methoxy[1]benzothieno[3,2- b][1]benzofuran-7-carboxylate ( 15) was prepared by this methodology as a new type of a core for liquid crystal synthesis.