申请人:Hoechst Aktiengesellschaft
公开号:US05734072A1
公开(公告)日:1998-03-31
The invention relates to a process for preparing monoalkyl phosphonites of the formula I ##STR1## where R.sup.1 is (C.sub.1 -C.sub.16)-alkyl, cyclohexyl, cyclopentyl, or phenyl, each of which can also be substituted by halogen, (C.sub.1 -C.sub.6)-alkyl, (C.sub.1 -C.sub.6)-alkoxy or dialkylamino groups and R.sup.2 is (C.sub.1 -C.sub.8)-alkyl, which comprises reacting dichlorophosphines of the formula (II) R.sup.1 --PCl.sub.2 (II) where R.sup.1 has the meaning given above, with alcohols of the formula (III) R.sup.2 OH (III) where R.sup.2 has the meaning given above, the molar ratio of dichlorophosphine/alcohol being 1:3 to 1:20, and then, as soon as the content of ionic chlorine in the reaction mixture is 50-75% of the theoretical total chlorine content of the reaction mixture, reacting the mixture with ammonia.
本发明涉及一种制备式I的单烷基膦酸酯的过程,其中R1是(C1-C16)烷基,环己基,环戊基或苯基,每个基团也可以被卤素,(C1-C6)烷基,(C1-C6)烷氧基或双烷基氨基基团取代,而R2是(C1-C8)烷基,包括以下步骤:将式(II)R1-PCl2(II)的二氯膦与式(III)R2OH(III)的醇反应,其中R1和R2的含义如上所述,二氯膦/醇的摩尔比为1:3至1:20,然后,一旦反应混合物中离子氯的含量为反应混合物理论总氯含量的50-75%,将混合物与氨反应。