Dialkylation of diethyl 3,4-dihydroxythiophenedicarboxylate followed by ester hydrolysis and acid decarboxylation provides a general route to 3,4-dialkoxythiophenes.
Electrochemical and Nonlinear Optical Studies of New D–A Type π-Conjugated Polymers Carrying 3,4-Benzyloxythiophene, Oxadiazole, and 3,4-Alkoxythiophene Systems