An Efficient One-Pot Synthesis and Temperature Dependence of NMR Spectra of Nitrogen-Containing Phosphorus Ylides
The addition of triphenylphosphine to dialkyl acetylenedicarboxylates in the presence of trifluoroacetamide, a NH acid, leads to stable crystalline phosphorus ylides in exellent yields. These stable ylides exist as a mixture of two geometrical isomers as a result of restricted rotation around the carbon-carbon partial double bond, resulting from conjugation of the ylide moiety with the adjacent group.
Keywords: Acetylenic ester; stabilized ylides; trifluoroacetamide; triphenylphosphine
Document Type: Research Article
Affiliations: Mazandaran University, Babolsar, Iran
Publication date: 01 October 2003
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