Activated carboxylates from the photooxygenation of oxazoles
作者:Harry H. Wasserman、Ronald J. Gambale、Mitchell J. Pulwer
DOI:10.1016/s0040-4020(01)93281-8
日期:——
Oxazoles may be used as masked forms of activated carboxylic acids since they readily form triamides on reaction with singlet oxygen. With 2-alkyl-4,5-diphenyloxazoles, the triamides formed on photooxygenation undergo selective nucleophilic attack at the acyl carbonyl derived from the 2-oxazole position. Using 2-(ω- hydroxyalkyl)-4,5- diphenyloxazoles as substrates, the oxidation-acylation sequence