申请人:Takasago International Corporation
公开号:US05693868A1
公开(公告)日:1997-12-02
The present invention provides a method for producing novel optically active diphosphine compounds \x9b2,2'-bis(di-substituted phosphino)-1,1'-binaphthyl compounds! having a selectivity (chemoselectivity or enantioselectivity) and catalytic activity different from those of conventional BINAP compounds. In a method of the present invention for producing an optically active diphosphine compound (i.e., 2,2-bis(di-substituted phosphino)-1,1'-binaphthyl), 2,2'-bis(trifluoromethanesulfonyloxy)-1,1'-binaphthyl is reacted, in the presence of a transition metal-phosphine complex, with a phosphineoxide compound represented by the following general formula: A.sub.2 P(O)H wherein A represents a phenyl group; a mono- to tri-substituted phenyl group, wherein each substituent in the substituted phenyl group is individually selected from the group consisting of a halogen atom, a lower alkyl group, a lower alkoxy group or a lower halogenated-alkoxy group such that one or more of the substituents may be the same or different; a naphthyl group; a lower-alkyl naphthyl group; or a lower-alkoxy naphthyl group.
本发明提供了一种生产新型光学活性双膦化合物(即2,2'-双(二取代磷基)-1,1'-联萘化合物)的方法,具有不同于传统BINAP化合物的选择性(化学选择性或对映选择性)和催化活性。在本发明的一种生产光学活性双膦化合物(即2,2-双(二取代磷基)-1,1'-联萘基)的方法中,在过渡金属-膦配合物的存在下,将2,2'-双(三氟甲磺氧基)-1,1'-联萘与下列通式所表示的膦氧化合物反应:A.sub.2 P(O)H,其中A代表苯基;一至三取代的苯基,其中取代基在取代苯基中各自从卤素原子,低碳基,低烷氧基或低卤代烷氧基组成,以便一个或多个取代基可以相同或不同;萘基;低烷基萘基;或低烷氧基萘基。