A process for the preparation of alkyl arylphosphinites of the formula (I) in which R.sup.1 is (C.sub.1 -C.sub.16)-alkyl, cyclohexyl, cyclopentyl, aryl which can also be substituted by halogen, (C.sub.1 -C.sub.6)-alkoxy groups R.sup.2 is aryl which can also be substituted by halogen, (C.sub.1 -C.sub.6)-alkyl, (C.sub.1 -C.sub.6)-alkoxy groups, where R.sup.1 and R.sup.2 together with the phosphorous atom can also form a ring and R.sup.3 is (C.sub.1 -C.sub.4)-alkyl, which comprises reacting halo(aryl)phosphines of the formula (II) ##STR1## in which R.sup.1, R.sup.2 have the meaning given above and X is halogen, with ammonia-containing alcohols of the formula (III) R.sup.3 OH (III) in which R.sup.3 has the meaning given above.
一种制备公式(I)的烷基芳基
亚磷酸酯的方法,其中R.sup.1是(C.sub.1-C.sub.16)烷基,环己基,环戊基,芳基,也可以被卤素取代,(C.sub.1-C.sub.6)-烷氧基;R.sup.2是芳基,也可以被卤素取代,(C.sub.1-C.sub.6)-烷基,(C.sub.1-C.sub.6)-烷氧基,其中R.sup.1和R.sup.2与
磷原子一起也可以形成环;R.sup.3是(C.sub.1-C.sub.4)-烷基。该方法包括将公式(II)的卤代(芳基)膦化合物与含
氨基的公式(III)R.sup.3OH(III)的醇反应,其中R.sup.1,R.sup.2具有上述含义,X为卤素。