Synthesis and Characterization of Dithia[3.3](2,6)pyridinophane-Containing Polymers:  Application to the Palladium-Catalyzed Heck Reaction

Abstract

We synthesized zigzag polymers consisting of dithia[3.3](2,6)pyridinophane units that were flipped rapidly as a result of syn-[anti]-syn isomerization. Pyridinophane units were fixed in the syn form by complexation with palladium, and the resulting polymer complex exhibited a high catalytic activity for the Heck coupling reaction