Zeolite (H-ZSM 5) catalysed regio and stereoselective reduction of 2,3-epoxy alcohols to 1,2-diols and vinylic epoxides to homoallylic alcohols with sodium cyanoborohydride

摘要

A variety of 2,3-epoxy alcohols and vinylic epoxides (having the epoxide moieties at the terminal positions) undergo reduction with zeolite H-ZSM 5/NaCNBH3 combination of reagent system in refluxing dichloroethane to give 1,2-diols and homoallylic alcohols in moderate to good yields. Under these conditions acid sensitive groups such as an acetal and a THP ether are not affected which indicates the mildness of the reaction conditions. (C) 1999 Elsevier Science Ltd. All rights reserved. [References: 43]