| 摘要 |
<p>The invention relates to a process for the preparation of epoxides of organic enolesters having the general formula: wherein R is an allyl radical, which process comprises reacting salts of organic acids of alkaline or alkaline-earth materials of formula Me(OOCR)n wherein Me is the alkaline or alkalineearth metal, n represents the valence and R has the nbove meaning, with compounds of the general formula: wherein X represents an halogen, the reaction taking place in the presence of a solvent selected among alcohols, ketones, dimethylformamide and alkyl acetates, at a temperature ranging between -30 and +70.degree.C and at such a pressure so as to maintain the system in a liquid phase. The compounds according to the present invention are useful intermediates for organic syntheses, in the preparation, for example of alpha-hydroxy, -acyloxy,-amino carbonyl, beta-hydroxy-amino-acids.</p> |
