Oxazoles as masked activated carboxylates. Synthesis of (±)-di-O-methylcurvularin
作者:H.H. Wasserman、R.J. Gambale
DOI:10.1016/s0040-4039(01)92361-5
日期:1981.1
The dimethyl ether of the mold metabolite, curvularin, was synthesized by intramolecular esterification of an activated carboxylate derived from the photooxidation of an oxazole precursor.
828. Curvularin. Part I. Isolation and partial characterisation of a metabolic product from a new species of Curvularia
作者:O. C. Musgrave
DOI:10.1039/jr9560004301
日期:——
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