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Potentiostatic electrolysis (divided cell, anode compartment) of 1-methyl- and 1-phenylpyrroles in the presence of sodium 4-nitro-pyrazolate and sodium 3-nitropyrazolate in MeCN/MeOH gave the corresponding 2-(azol-1-yl)pyrroles in 20–43% current and substance yields.
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Sigacheva et al. (2012) studied this question.
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