Synthesis of 3,4-bis[(methoxycarbonyl)methyl]thiophene and bis-, ter- and and pentathiophenes with alternating 3,4-bis[(methoxycarbonyl)methyl]-substituted rings

The synthesis of 3,4-bis[(methoxycarbonyl)methyl]thiophene and bis-, ter- and pentathiophenes, with alternating 3,4-bis(methoxycarbonyl)methyl-substituted rings, is reported, These new thiophene derivatives are possible precursors for the preparation of new conducting polymers useful as materials for electronics.