Electrochemical Azolation of N-substituted Pyrroles: A New Case in SNH(An) Reactions

Potentiostatic electrolysis (divided cell, anode compartment) of 1-methyl- and 1-phenylpyrroles in the presence of sodium 4-nitropyrazolate and sodium 3-nitropyrazolate in MeCN/MeOH gave the corresponding 2-(azol-1-yl)pyrroles in 20-43% current and substance yields.