Reactions of methyl 3‐hydroxythiophene‐2‐carboxylate. Part <b>4.</b> Synthesis of methyl 5‐azolyl‐3‐hydroxythiophene‐2‐carboxylates

Abstract

Abstract The indirect introduction of an azolyl group in position 5 of compound 1 by an easy two‐step procedure taking place at room temperature is described. A similar procedure yields the 4‐chloro derivatives of these 5‐azolyl compounds. The same method is applied for the introduction of a 5‐azido group and from the 5‐azido compounds, 5‐ v ‐triazolyl derivatives are obtained by a known method.