A Simple and Efficient Synthesis of α,β-Unsaturated Hydrazones from Functionalized Ylides and Phosphine Oxides

Article abstract of DOI:10.1016/S0040-4039(00)79189-1

A simple and very efficient route to α,β-unsaturated hydrazones derived from ketones has been developed.These compounds are obtained through Wittig reaction of the phosphoranes generated "in situ" from 4b-enhydrazino phosphonium salts with aldehydes and olefination reaction of phosphine oxides derived from hydrazines. Key Words: Hydrazones, 1-Azadienes, Phosphorus ylides, Phosphine oxides.