Journal of heterocyclic chemistry

Reaction of hydrazonyl chlorides and carboalkoxymethylene triphenylphosphoranes to give 5??alkoxy substituted pyrazoles

A Padwa, JG MacDonald

Index: Padwa, Albert; MacDonald, J. Gavin Journal of Heterocyclic Chemistry, 1987 , vol. 24, p. 1225 - 1227

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Citation Number: 8

Abstract

Abstract The reaction of ethyl chloroglyoxylate phenyl hydrazone and diphenyl hydrazonyl chloride with several carboalkoxymethylene triphenylphosphoranes has been examined. The products isolated correspond to N-phenyl-3-carboalkoxy-5-alkoxy substituted pyrazoles. The mechanism advanced to account for the formation of the products involves the stepwise addition of a nitrile imine intermediate with the Wittig reagent.