Self-condensation of N-substituted (4 H -thieno[3,2- b ]-pyrrol-5-yl)methanols into bis(thienopyrrolyl)methanes

New polymers based on thieno[3,2-b]pyrrole derivatives and their electrochemical properties

“…Previously, we observed the formation of insoluble polymeric materials in the reactions of NBS with unsymmetrical thienopyrromethanes 1 . 20 In the current work, polymers P1a,b and new polymers P2a–c from symmetrical bis(thienopyrro)methanes 2a–c 21 were synthesized mainly using the Br 2 –dioxane complex (Scheme 2).…”

“…In the current work, we have studied new monomers, thieno [3,2-b]pyrrole derivatives 1 and 2, in oxidative polymerization reactions with N-bromosuccinimide (NBS) and Br 2 (Scheme 2). 20,21 These monomers contain two reactive aromatic fragments separated by a methylene group. Thus, oxidative polymerization reactions can occur in several directions: separated reactions for both fragments, joint participation of the fragments with the formation of a linear chain, or chaotic variants of chain growth leading to the formation of branched polymers.…”