Generation of sec-thioamide dianions and their regioselective reaction with electrophiles.
作者:Y. Tamaru、M. Kagotani、Y. Furukawa、Y. Amino、Z. Yoshida
DOI:10.1016/s0040-4039(01)81919-5
日期:1981.1
The enolates of sec-thioamides 8, which are generated by three different methods (scheme II and equation 1), are alkylated selectively at the α-carbon to the thiocarbonyl group. The unusual β′-lithiation to provide an intermediate 11 is observed for N-methyl-α, β-dimetylthioacrylamide and N-methyl-thiocyclohexenecarboxamide.
通过三种不同方法(方案II和方程式1)生成的仲硫酰胺8的烯醇化物在α-碳上选择性烷基化为硫代羰基。对于N-甲基-α,β-二甲基硫代丙烯酰胺和N-甲基-硫代环己烯羧酰胺,观察到异常的β'-锂化提供中间体11。