Activated dimethyl sulfoxide dehydration of amide and its application to one-pot preparation of benzyl-type perfluoroimidates
作者:Noriyuki Nakajima、Miho Saito、Makoto Ubukata
DOI:10.1016/s0040-4020(02)00304-6
日期:2002.4
Various types of primary amides were treated under an activated dimethyl sulfoxide (DMSO) species, (COCl)(2)-DMSO and Et3N, as a dehydrating agent to obtain nitriles in excellent yield. This dehydration system was extended to a one-pot preparation of perfluoroimidates via volatile perfluoronitriles from perfluoroamides. Fifteen benzyl-type perfluoroimidates can be prepared in 70-90% yield as more stable imidates than the trichloro analogue. MPM- and DMPM-perfluoroimidates can be used to protect alcohols in place of the trichloroacetimidate with excellent chemical properties and in comparable yields. (C) 2002 Elsevier Science Ltd. All rights reserved.