A Novel Synthesis of Dithieno[2,3-b:3′,2′-d]thiophene and its Bromo Derivatives

Two new approaches to multigram synthesis of dithieno[2,3-b:3′,2′-d]thiophene are described. Various mono-, di-, tri- and tetrabromides of dithieno[2,3-b:3′,2′-d]thiophene are prepared in good yield.