[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‐silyl migration has been exploited to chemoselectively transform esters into ketones by using organolithium reagents, allowing multicomponent synthesis 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‐silyl migrations. The resulting α‐thioketones are valuable
利用有机锂试剂,已开发出一种[1,4] -S-到O-甲硅烷基的迁移方法,可将酯化学选择性地转化为酮,从而实现α-硫代酮的多组分合成。机理研究表明,这种迁移以分子内方式进行,并且比相应的[1,5] -S-向O-和[1,3] -C-向O-甲硅烷基的迁移更有利。所得的α-硫酮是合成环状或多官能化有机硫化合物的有价值的组成部分。