Aldéhydes α-silylés: préparation et propriétés nouvelles
作者:L. Duhamel、J. Gralak、B. Ngono
DOI:10.1016/0022-328x(89)88060-x
日期:1989.3
(Z)-β-silylenoxysilane (2), prepared from (Z-1-bromo-2-(trimethylsiloxy)ethylene by reaction with t-butyllithium followed by condensation with t-butyldimethylsilyl triflate. The lithium enolate of aldehyde 3 is prepared direct by reaction with lithiumdiisopropylamide or lithium hexamethyldisilazane; its condensation with trimethylchlorosilane leads to the (E)-β-silylenoxysilane (2) and with aldehydes
A novel 1,3-migration of the trimethylsilyl group from oxygen to carbon
作者:L. Duhamel、J. Gralak、B. Ngono
DOI:10.1016/0022-328x(94)87022-5
日期:1994.1
Condensation of 1-lithio-2-trimethylsiloxyethylene 1 with t-butyl(dimethyl)silyl triflate 2a leads to silylated enol ethers 4a or 4b according to the experimental conditions. The formation of 4b is due to a 1,3-migration of the trimethylsilyl groupfromoxygen to carbon of 1. Condensation with chlorosilane 2b lead exclusively to 4b.