中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (3-(bromomethyl)but-3-en-2-yloxy)(tert-butyl)diphenylsilane | 510774-06-8 | C21H27BrOSi | 403.434 |
—— | (4-bromo-3-methylenepentyloxy)(tert-butyl)diphenylsilane | 510774-04-6 | C22H29BrOSi | 417.461 |
—— | anti-(4R,5R,6E,8E)-1-(tert-butyldiphenylsilyloxy)-4,6,8,10,10-pentamethyl-3-methyleneundeca-6,8-dien-5-ol | 916461-39-7 | C33H48O2Si | 504.828 |
—— | (6E,8E)-1-(tert-butyldiphenylsilyloxy)-4,6,8,10,10-pentamethyl-3-methyleneundeca-6,8-dien-5-one | 916461-60-4 | C33H46O2Si | 502.813 |
The addition of cyclohexyl and t-butyl free radicals to silylated derivatives of alkyl 2-(1-hydroxyalkyl) propenoates was found to be stereoselective . In the case of the cyclohexyl radical the stereoselectivity was dependent upon the conditions used to generate the free radical and to quench the intermediate. Stereoselectivity in additions of the t-butyl radical was found to be temperature-dependent. In all cases stereoselectivity increased as the steric bulk of the group attached to the carbinol oxygen increased. A simple model which accounts for the stereoselectivity is proposed.