Stereoselective Synthesis of Tetrasubstituted Olefins through a Halogen-Induced 1,2-Silyl Migration
作者:Nicholas T. Barczak、Douglas A. Rooke、Zachary A. Menard、Eric M. Ferreira
DOI:10.1002/anie.201303007
日期:2013.7.15
Migrating through Si valley: The highly stereoselective formation of α‐silyl‐β‐ haloenones by way of silicon group migration is described. Electrophilic activation of the alkyne by N‐halosuccinimides induced an anti‐selectivemigration to give highly substituted enones (see scheme). These enone products can be readily converted to the all‐carbon tetrasubstituted alkenes while maintaining their geometry