Novel chiral phosphorus compounds of the general formula ##STR1## wherein R signifies substituted or unsubstituted phenyl, R.sup.1 and R.sup.2, which can be the same or different, signify hydrogen, lower alkyl, lower alkoxy, di-lower alkylamino or protected hydroxymethyl or R.sup.1 and R.sup.2 together signify the group ##STR2## in which m represents a number 3 to 5, R.sup.4 represents lower alkyl, substituted or unsubstituted phenyl or benzyl and R.sup.5 represents lower alkyl or both R.sup.5 's together represent lower alkylene, R.sup.3 signifies methyl, lower alkoxy, di-lower alkylamino or fluorine and n signifies the number 0, 1, 2 or 3, are described. The compounds of formula I are useful in the form of complexes with a metal of Group VIII as catalysts for asymmetric hydrogenations and enantioselective hydrogen displacements in prochiral allylic systems.
                            一般式为##STR1##的新手性
磷化合物,其中R代表取代或未取代的苯基,R.sup.1和R.sup.2可以相同也可以不同,代表氢、低烷基、低烷氧基、二低烷基
氨基或保护的羟甲基,或者R.sup.1和R.sup.2一起代表##STR2##,其中m表示3到5的数字,R.sup.4代表低烷基、取代或未取代的苯基或苄基,R.sup.5代表低烷基或R.sup.5'一起代表低烷基烯基,R.sup.3代表甲基、低烷氧基、二低烷基
氨基或
氟,n表示0、1、2或3的数字。公式I的化合物在与第VIII族
金属形成的配合物中作为催化剂,对于不对称氢化和对称氢代替反应中的脆性烯丙基系统具有手性选择性。