作者:E. Armani、A. Dossena、R. Marchelli、G. Casnati
DOI:10.1016/s0040-4020(01)88443-x
日期:1984.1
Reacting aldehydes and ketones with the “ButBr-Me2SO” system produces the corresponding α-bromoderivatives 2. In the case of ketones, is possible, bromination is obtained exclusively at the more highly substituted α-position. With slight modifications of the reaction conditions (add to obtain “in situ” formation of either dimethyl(2-oxo-2-phenylalkyl)sulphonium salts 3 or of α-methylthioderivatives
反应的醛和酮与“卜吨溴-ME 2 SO”系统产生相应的α-bromoderivatives 2.在酮的情况下,是可能的,是在更高度取代的α位只获得溴化。在反应条件稍作改动的情况下(添加以“原位”形成二甲基(2-氧代-2-苯基烷基)s盐3或α-甲基硫代衍生物4。)在结晶过程中,二甲基(lm溴化物)(3h)会自发分解。单晶X射线分析证明两种对映体