A Facile Regioselectively Synthesis of 2‐Alkenylbenzo[1,2‐b:4,5‐b’]dithiophene by Pd/Cu/Ag‐Catalyzed C‐H Functionalization

Abstract

In this work, several alkenylated benzo [1,2-b:4,5-b']dithiophene were synthesized by Pd-catalyzed CÀ H functionalization of benzo [1,2-b:4,5-b']dithiophene with various alkenes. This direct alkenylation took place regioselectively at the C-2 position of the fused heterocycle. The obtained compounds were structur-ally characterized by NMR and MS spectroscopic methods. Moreover, DFT calculations have been employed to shed light on the regioselectivity of the reaction as well as on the geometry and electronic properties of the newly formed C=C double bonds.