Mild Zinc-Promoted Horner-Wadsworth-Emmons Reactions of Diprotic Phosphonate Reagents
作者:Paul Helquist、Douglas Schauer
DOI:10.1055/s-2006-950292
日期:2006.11
We report the development of a mild protocol for the Horner-Wadsworth-Emmons reaction of diprotic phosphonates that makes use of a zinc triflate promoter in the presence of mild tertiary amine bases to produce α,β-unsaturated carboxylic acids and amides.
The Beckmann rearrangement of substituted benzylideneacetone oximes
作者:R. E. Corbett、C. L. Davey
DOI:10.1039/jr9550000296
日期:——
Sadanandam, Yennu S.; Leelavathi, Panaganti; Ansari, Imtiaz A., Journal of Chemical Research, Miniprint, 1992, # 5, p. 1147 - 1158
作者:Sadanandam, Yennu S.、Leelavathi, Panaganti、Ansari, Imtiaz A.
DOI:——
日期:——
Synthesis and Reactions of 2-Substituted Ethyl <i>N</i>-Alkylmalonylhydroxamic Acids
作者:Robert V. Hoffman、Sachin Madan
DOI:10.1021/jo0300690
日期:2003.6.1
Alkylation of O-silylated N-alkylmalonylhydroxamic acids provides a method for the synthesis of 2-substituted N-alkylmalonyl hydroxamic acids. The substituent at C-2 does not materially change the chemistry of the alpha-lactam intermediates produced from them. They can be converted to unsymmetric ureas and hydantoins in high yields. The addition of unsaturated substituents at C-2 is used to produce