Access to diethylenic dithioesters by thio-claisen rearrangement
作者:Patrick Metzner、Thi Nhan Pham、Jean Vialle
DOI:10.1016/s0040-4020(01)87619-5
日期:1986.1
dithioacetals leads to diethylenic dithioesters under mild conditions (from 20°C to 100°C). The thio-Claisen transposition is thus confirmed as a facile sigmatropic shift. It is also demonstrated that the reverse reaction (retro thio-Claisen) proceeds simultaneously. The equilibrium mixture of ketene dithioacetal and dithioester ie usually in the range of 70 : 30 to 95 : 5. Thiophilic addition to these diunsaturated