Synthesis of 4,4 '-dimethoxy-3,3 '-bithiophene

摘要

Reaction between 3,3'-dibromothiophene and sodium methylate/methanol in the presence of KI/CuO afforded 3-bromo-4-methoxythiophene as a major product. It was transformed into 4,4'-dimethoxy-3,3'-bithiophene by using Pd(OAc)(2) as a catalyst and agarose as a ligand. The conditions of the reaction were mild with an acceptable yield of 20 %. The product was characterized by MS, H-1 NMR, and its spectra of UV-Vis and cyclic voltammetry were given.