1,2- versus 1,3-Silyl migration in the reaction of acylsilanes with silyl-substituted carbanions
摘要:
The Peterson olefination of acylsilanes 1 by silylated carbanions 5,14 to give alkenes 13,17 via a 1,3-silyl shift is favored by the stabilization of the carbanion intermediate 16 through two sulfide units versus one as in 12, while a combination of DMPS on I and TBS on 14 leads to 1,2-migration product 15. (C) 2008 Published by Elsevier Ltd.
1,2- versus 1,3-Silyl migration in the reaction of acylsilanes with silyl-substituted carbanions
作者:Thomas Puschke、Jens Lange、Ernst Schaumann
DOI:10.1016/j.tetlet.2008.02.077
日期:2008.4
The Peterson olefination of acylsilanes 1 by silylated carbanions 5,14 to give alkenes 13,17 via a 1,3-silyl shift is favored by the stabilization of the carbanion intermediate 16 through two sulfide units versus one as in 12, while a combination of DMPS on I and TBS on 14 leads to 1,2-migration product 15. (C) 2008 Published by Elsevier Ltd.