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    • 3. 发明授权
    • Process of preparing halogenated esters
    • 制备卤代酯的方法
    • US06703520B2
    • 2004-03-09
    • US10117241
    • 2002-04-05
    • Klaus HintzerEgon ObermaierWerner Schwertfeger
    • Klaus HintzerEgon ObermaierWerner Schwertfeger
    • C07C20500
    • C07C67/00Y02P20/582C07C69/708
    • The present invention provides a process for preparing a desired halogenated ester, which process comprises the steps of: (a) contacting (A) a substantially organic solvent free liquid mixture of (i) an alkanolate of the formula M—O—Z, wherein M is an alkali or alkaline earth metal, and Z is a linear, branched or cyclic alkyl group of 1 to 10 carbon atoms and (ii) a diester with (B) a halogenated ethylenically unsaturated olefin at a temperature of not more than 40° C. and with a mol ratio of halogenated ethylenically unsaturated olefin to alkanolate of not more than 1.1; (b) contacting an acid with a thus obtained reaction mixture thereby obtaining a mixture comprising the desired halogenated ester; and (c) recovering the halogenated ester from said reaction mixture. In step (a) of the process, the mixture of the alkanolate and diester is contacted with the halogenated ethylenically unsaturated olefin under conditions of agitation sufficient such that the weight ratio of halogenated ester to halogenated ketone as a byproduct obtained after step (b) is at least 10:1.
    • 本发明提供了一种制备所需卤代酯的方法,该方法包括以下步骤:(A)使(A)基本上无机溶剂的液体混合物与(ⅰ)式MOZ的链烷醇酯接触,其中M为碱 或碱土金属,Z为1〜10个碳原子的直链,支链或环状烷基,(ii)在不高于40℃的温度下具有(B)卤化烯键式不饱和烯烃的二酯和 卤化烯键式不饱和烯烃与链烷醇酸酯的摩尔比不超过1.1;(b)使酸与如此获得的反应混合物接触,从而得到包含所需卤代酯的混合物; 在该方法的步骤(a)中,使链烷醇酸酯和二酯的混合物在搅拌足够的条件下与卤化烯属不饱和烯烃接触,使卤代酯的重量比 作为步骤(b)后获得的副产物的卤代酮为至少10:1。