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Some differently substituted 4-phenylthiophene derivatives 2a-d and 8a, b have been prepared from α-substituted-β-thiocyanatomethyl cinnamonitrile (1). The thiophene derivatives 2a, b and 8a react with trichloroacetonitrile and formamide to afford thieno[2,3-d]pyrimidine derivatives 4, 5 a-c, 7 and 9 a-c, respectively.

Heterocyclic Synthesis with Nitriles: A Novel Synthesis of Some Thiophene and Thieno[2,3-d]pyrimidine Derivatives, II [1]