New phosphonium ylides by functionalization of triphenylphosphoranylideneacetamide
摘要:
Triphenylphosphoranylideneacetamide undergoes Michael reactions with several acceptors, giving rise, apart from the normal Michael adducts, to the formation of different products like glutarimide ylides and stabilized iminophosphoranes. Wittig reactions with these new ylides lead to a variety of alpha,beta-unsaturated carbonyl compounds.
New phosphonium ylides by functionalization of triphenylphosphoranylideneacetamide
作者:Martin J. Wanner、Gerrit-Jan Koomen
DOI:10.1016/s0040-4039(00)91662-9
日期:1992.3
Triphenylphosphoranylideneacetamide undergoes Michael reactions with several acceptors, giving rise, apart from the normal Michael adducts, to the formation of different products like glutarimide ylides and stabilized iminophosphoranes. Wittig reactions with these new ylides lead to a variety of alpha,beta-unsaturated carbonyl compounds.
2-Substituted Glutarimides via Preformed Wittig Reagents
作者:M. J. Wanner、G. J. Koomen
DOI:10.1055/s-1988-27558
日期:——
Triphenylphosphoranylideneacetamide (1) reacts with some Michael-acceptors to give crystalline 2-triphenylphosphoranylidene glutarimides. The Wittig reaction of 2 with several aldehydes in refluxing 1,2-dichloroethane affords the corresponding 2-alkylideneglutarimides 7 in 50-98% yield.