申请人:Hoechst Akteingesellschaft
公开号:US04904813A1
公开(公告)日:1990-02-27
The invention relates to compounds of the general formula ##STR1## in which R.sup.1 represents Hal or C.sub.1 -C.sub.3 -alkyl and Hal reprsents a halogen having an atomic weight of 35 to 80. The invention also relates to a process for the preparation of such compounds by reacting a compound of the general formula II ##STR2## in which R.sup.2 represents C.sub.1 -C.sub.3 -alkyl or OR.sup.3 and R.sup.3 represents C.sub.1 -C.sub.8 -alkyl, preferably C.sub.1 -C.sub.3 alkyl, with an acid chloride of the formula MHaL.sub.2 (III), in which M represents SO, CO or PHal.sub.3 and Hal represents a halogen having an atomic weight from 35 to 80, and in which the reaction, if M is Co, is carried out in the presence of a catalyst which is customary for the phosgenation of diesters of phosphonic acid. Finally the invention relates to alkyl esters of cyanomethyl-methylphosphinic acid, i.e. to products of the formula II in which R.sup.2 is a methyl group and R.sup.3 is an alkyl group of 1 to 6 carbon atoms.
本发明涉及一般式为##STR1##的化合物,其中R.sup.1代表卤素或C.sub.1-C.sub.3烷基,Hal代表原子量为35至80的卤素。本发明还涉及通过将一般式为II的化合物##STR2##与式为MHaL.sub.2(III)的酸氯化物反应制备这种化合物的方法,其中R.sup.2代表C.sub.1-C.sub.3烷基或OR.sup.3,R.sup.3代表C.sub.1-C.sub.8烷基,优选为C.sub.1-C.sub.3烷基,M代表SO、CO或PHal.sub.3,Hal代表原子量为35至80的卤素,如果M为Co,则在磷酸二酯的光气化反应中常用的催化剂存在下进行反应。最后,本发明涉及氰甲基甲基膦酸酯的烷基酯,即式中R.sup.2为甲基基团,R.sup.3为1至6个碳原子的烷基团的产物。