Three-component synthesis of (E)-α,β-unsaturated amides of the piperine family
作者:Rainer Schobert、Sven Siegfried、Gary J. Gordon
DOI:10.1039/b105745f
日期:——
Selective formation of (E)-α,β-unsaturated amides by intermolecular three-component reaction between aldehydes, amines (1° or 2°) and ketenylidenetriphenylphosphorane (Ph3PCCO) is described. Natural amides such as fagaramide and piperines could be prepared from immediately available educts. The method is shown to be extendable to the preparation of thioesters from thiols and aldehydes.