Highly diastereoselective synthesis of substituted epichlorohydrins and regioselective preparation of allyl alcohols using chloro or iodomethyllithium
作者:JoséM. Concellón、Luján Llavona、Pablo L. Bernad
DOI:10.1016/0040-4020(95)90943-q
日期:1995.5
Substituted epichlorohydrins 3 or 6 are obtained from α-bromo or α-chlorocarbonyl compounds (1 or 4) and chloro or iodomethyllithium, respectively. Starting from α-bromocarbonyl compounds 1 or acyclic α-chloro ketones the reaction takes place with total diastereoselectivity. Treatment of epichlorohydrins 3 or 6 with lithium iodide affords the same substituted allyl alcohols 7 in a regioselective manner