From-Core and From-End Direct CH Arylations: A Step-Saving New Synthetic Route to Thieno[3,4-c]pyrrole-4,6-dione (TPD)-Incorporated D---A--D Functional Oligoaryls

摘要

In contrast to the traditional multistep synthesis, herein an efficient and fewer-steps new synthetic strategy is demonstrated for the facile preparation of organic-electronically important D--A--D-type oligoaryls through sequential direct CH arylations. This methodology has shown that the synthesis of thieno[3,4-c]pyrrole-4,6-dione (TPD)- or furano[3,4-c]pyrrole-4,6-dione (FPD)-centred target molecules could be accessed step-economically either from the core structure (acceptor) or from the end structure (donor), which supplied a more flexible and succinct new synthetic alternative to the preparation of the -functional small-molecule semiconducting materials. In addition, optical and electrochemical properties of the synthesized oligoaryls were examined.