反应详情

温度

-70 °C

Methyllithium in diethyl ether (0.25 mol, 140 ml of 1.8 M solution) was added dropwise to a solution of 27.6 g (0.27 mol) of diisopropylamine in 40 ml of diethyl ether. The reaction mixture was cooled to -70° C. and 37.5 g (0.16 mol) of ethyl 4-isobutyl-α-methylphenylacetate were added dropwise. The reaction mixture was warmed to 0° C. and 46 ml (0.36 mol) of chlorotrimethylsilane were added. The reaction mixture was stirred overnight at 25° C., filtered and then distilled to give 34.3 g (70% yield) of β-ethoxy-4-isobutyl-α-methyl-β-(trimethylsiloxy)-styrene as a colorless liquid, bp 129°-130° C. (0.4 mm). Anal. Calcd. for C18H30O2Si: C, 70.53; H, 9.87; Found: C, 70.38; H, 9.78.

1. temperatureThe reaction mixture was warmed to 0° C.
2. filtrationfiltered
3. distillationdistilled