Synthesis of β-heteroaryl propionates via trapping of carbocations with π-nucleophiles
摘要:
A variety of heterocyclic alcohols and acetates were Coupled with silyl ketene acetals and other pi-nucleophiles in the presence of trimethylsilyl trifluoromethanesulfonate to provide an array Of Substituted beta-heteroaryl propionates, including those with contiguous quaternary centers, as well as vinylogs thereof. This reaction also proceeds with high diastereoselectivity when the pi-nucleophile bears a chiral auxiliary. (C) 2009 Elsevier Ltd. All rights reserved.
Magnesium trifluoromethanesulfonimide(triflimide) promoted substitution reactions of allylic and benzylic acetates. Magnesium triflimide as a substitute for magnesium perchlorate
作者:Paul A. Grieco、Scott T. Handy
DOI:10.1016/s0040-4039(97)00441-3
日期:1997.4
Magnesium triflimide(10 mol% in methylene chloride) is a convenient catalyst for the nucleophilic substitution of allylic and benzylic acetates, and constitutes a useful alternative to magnesium perchlorate. (C) 1997 Elsevier Science Ltd.