[1,4]‐S‐ to O‐Silyl Migration: Multicomponent Synthesis of α‐Thioketones through Chemoselective Transformation of Esters to Ketones with Organolithium Reagents
作者:Xianwei Sun、Zhenlei Song、Hongze Li、Changzheng Sun
DOI:10.1002/chem.201303459
日期:2013.12.16
A [1,4]‐S‐ to O‐silylmigration has been exploited to chemoselectively transform esters into ketones by using organolithiumreagents, allowing multicomponentsynthesis of α‐thioketones. Mechanistic studies reveal that this migration proceeds in an intramolecular manner and is more favorable than the corresponding [1,5]‐S‐ to O‐ and [1,3]‐C‐ to O‐silylmigrations. The resulting α‐thioketones are valuable