Broadly Applicable Synthesis of Heteroarylated Dithieno[3,2- b :2′,3′- d ]pyrroles for Advanced Organic Materials – Part 1: Conducting Electropolymers

Herein, a novel and versatile method for the synthesis of N-heteroarylated dithieno[3,2-b:2,3’-d]pyrroles (DTP) is reported. By microwave-assisted Cu-catalyzed coupling of parent H-DTP 1 with 5- and 6-membered heteroaromatic halides a variety of novel N-functionalized DTPs was obtained. Supported by quantum chemical calculations and X-ray structure analysis, structural and optoelectronic properties of the π-conjugated systems were investigated and led to valuable structure-property relationships. Selected derivatives were electropolymerized to corresponding conducting DTP-polymers.