Oxime Esters as Acylating Agents in the Aminolysis Reaction. A Simple and Chemoselective Method for the Preparation of Amides from Amino Alcohols
作者:Susana Fernández、Emma Menéndez、Vicente Gotor
DOI:10.1055/s-1991-26553
日期:——
Oxime esters, such as acetone O-alkanoyl-, O-alkenoyl- or O-benzyloxycarbonyloximes, react with amines under extremely mild conditions to give the corresponding amides in very good yield. When amino alcohols are used a total chemoselectivity is observed.
作者:Samuel Braverman、Marina Cherkinsky、E.V.K Suresh Kumar、Hugo E Gottlieb
DOI:10.1016/s0040-4020(00)00360-4
日期:2000.6
competition between 1,2- vs. 1,3-elimination and nucleophilic substitution. Favorskiirearrangement was the preferred process, but in those cases where electronic or steric effects were present, nucleophilic substitution became dominant. No evidence of ketene formation was detected. The mechanism of formation of the various rearrangement products is discussed.