Stereoselective Reaction of α-Sulfinyl Carbanion Derived from Chiral 2-(Trialkylsilyl)ethyl Sulfoxides: Evidence for a Novel Silicon−Oxygen Interaction
作者:Shuichi Nakamura、Hirofumi Takemoto、Yoshio Ueno、Takeshi Toru、Terumitsu Kakumoto、Tsuneo Hagiwara
DOI:10.1021/jo9913560
日期:2000.1.1
Reactions of alpha-sulfinyl carbanions, derived from p-tolyl sulfoxides bearing various alkyl groups, with various electrophiles were examined. The reaction of alpha-sulfinyl carbanions, derived from the beta-silylethyl sulfoxides, with ketones or trimethyl phosphate, gave the syn products with high stereoselectivity. Interaction between the silicon in the trialkylsilyl group and the carbonyl oxygen
研究了衍生自带有各种烷基的对甲苯基亚砜的α-亚磺酰基碳负离子与各种亲电试剂的反应。衍生自β-甲硅烷基乙基亚砜的α-亚磺酰基碳负离子与酮或磷酸三甲酯反应,得到具有高立体选择性的合成产物。假定三烷基甲硅烷基中的硅与亲核试剂中的羰基氧之间的相互作用稳定过渡态,优选导致顺式非对映异构体。使用MOPAC 93 / PM3和高斯94 Beche3LYP / 3-21 + G方法进行的MO计算研究支持了这种新颖的硅氧相互作用。