Chiral diphosphines via 2,3 -sigmatropic rearrangement.Application in asymmetric transition metal catalysis
申请人:PPG-Sipsy S.C.A.
公开号:EP1182205A1
公开(公告)日:2002-02-27
The present invention refers to Chiral diphosphines selected from
a) diphosphines corresponding to the formula
wherein R1 - R4 are each independently selected from substituted and unsubstituted hydrocarbyl groups,
b) diphosphines corresponding to the formula
wherein R1 - R4 are each independently selected from substituted and unsubstituted hydrocarbyl groups with the proviso that if R1 and R2 is phenyl at least one of R3 and R4 is different from phenyl
c) diphosphines corresponding to the formula
wherein R1 - R4 are each independently selected from substituted and unsubstituted hydrocarbyl groups and R5 and R6 are each independently selected from the group consisting of hydrogen, alkyl and residues of protecting groups, whereby R6 and R5 taking together may be an divalent substituent thereby forming a bicyclus, to a method of making same, to a method for preparing a chiral precursor suitable for making the new chiral diphosphines, to transition metal complexes comprising the chiral diphosphines of the present invention, and to the use of either the chiral diphosphines or their transition metal complexes in asymmetric synthesis.
本发明涉及手性二膦化合物,所选的二膦化合物包括:
a)符合以下式子的二膦化合物,其中R1-R4各自独立地选自取代和未取代的碳氢化合物基团;
b)符合以下式子的二膦化合物,其中R1-R4各自独立地选自取代和未取代的碳氢化合物基团,但如果R1和R2是苯基,则R3和R4中至少有一个不同于苯基;
c)符合以下式子的二膦化合物,其中R1-R4各自独立地选自取代和未取代的碳氢化合物基团,而R5和R6各自独立地选自氢、烷基和保护基残基的群,其中R6和R5可以一起取代成为一个双价取代基团,从而形成一个双环。本发明还涉及制备该手性二膦化合物的方法、制备适用于制备新手性二膦化合物的手性前体的方法、包括本发明的手性二膦化合物的过渡金属配合物,以及在不对称合成中使用手性二膦化合物或其过渡金属配合物的用途。