Yield and selectivity enhancement by trimethylsilyl chloride in the conjugate addition of stabilized organolithiums
作者:Hong Liu、Theodore Cohen
DOI:10.1016/0040-4039(95)01919-9
日期:1995.12
The yield and selectivity in the conjugateaddition of some stabilizedorganolithiums to α,β-unsaturated carbonyl compounds, especially easily polymerized ones, are increased in the presence of trimethylsilylchloride, alone or in combination with hexamethylphosphoric triamide. E-silyl enol ethers bearing the versatile phenylthio group are obtained prior to hydrolysis. Some synthetic uses are demonstrated