In many cases, the reaction between α- or ω-chloro carbonyl derivatives and organozincs prepared from halides R3SiCCCH2Br is chemo- and regioselective: it affords, in a good yield, trialkylsilyl homopropargylic alcohols α′- or ω′-substituted by a chlorine atom. This behaviour is different of this of organoaluminiums which lead mainly to trialkylsilyl α-allenyl α′- or ω′-chlorinated alcohols.
在许多情况下,从制备卤化物α-或ω
氯羰基衍
生物和organozincs之间反应r 3 SiCCCH 2 Br为化疗和区域选择性的:它可以提供,以高收率,三烷基甲
硅烷homopropargylic醇α' -或ω'-被
氯原子取代。这种行为不同于主要导致三烷基甲
硅烷基α-烯基α'-或ω'-
氯化醇的
有机铝。