One-Pot Synthesis of N-Alkyl Sulfonyl Hydrazones by Dialkyl Acetylenedicarboxylate-Mediated Reaction of Trialkylphosphites with Sulfonyl Hydrazones

Stable derivatives of N-alkyl sulfonyl hydrazone were obtained in excellent yields from the reaction between electron-deficient acetylenic ester compounds and sulfonyl hydrazones in the presence of trialkylphosphites in dichloromethan at room temperature.

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