申请人:Hoechst Aktiengesellschaft
公开号:US04427603A1
公开(公告)日:1984-01-24
The disclosure relates to a process for making phosphonic acid ester chlorides of the general formula (I) R--P(O) ClOR' (I) in which R stands for an alkyl group with 1 to 6 carbon atoms or an aryl group and R' stands for an alkyl group with 1 to 20 carbon atoms or an aryl group. More particularly, a compound of general formula (II) R--PCl.sub.2 (II) is reacted with a sulfuric acid monoester of general formula (III) R'--O--SO.sub.3 H (III) R and R' in formulae (II) and (III) having the meanings given above; the reactants are used in about equimolar proportions and the reaction is effected at a temperature of from -20.degree. C. to 50.degree. C. After termination of the reaction, the phosphonic acid ester chloride is separated from the reaction mixture by subjecting this latter to distillation under vacuum.
本公开涉及一种制备磷酸酯氯化物的方法,其通用式为(I) R--P(O) ClOR' (I)。其中,R代表1至6个碳原子的烷基或芳基,R'代表1至20个碳原子的烷基或芳基。更具体地,将通式(II) R--PCl.sub.2 (II)的化合物与通式(III) R'--O--SO.sub.3 H (III)的硫酸单酯反应,其中式子(II)和(III)中的R和R'具有上述给定的含义。反应物以大约等摩尔比例使用,并在-20℃至50℃的温度下进行反应。反应结束后,通过在真空下蒸馏反应混合物来分离磷酸酯氯化物。