The present invention relates to optically active diphosphines. It is also targeted at their preparation according to a process for the resolution of the racemic mixture of the said phosphines to optically active isomers.
The subject of the invention is new optically active bis[1-phospha-2,3-diphenyl-4,5-dimethylnorbornadiene] diphosphines and a process for resolving the racemic bis[1-phospha-2,3-diphenyl-4,5-dimethylnorbornadiene] mixture which comprises reacting it with a palladium or platinum complex as chiral auxiliary in an organic solvent, thus forming diastereoisomer complexes, and then resolving the said optically pure complexes.
The invention also relates to new optically active metal complexes comprising the said phosphines and to their use in a process for the preparation of optically active carboxylic acids and/or derivatives according to a process for the hydrogenation of &agr;,&bgr;-unsaturated carboxylic acids and/or derivatives.
本发明涉及光学活性
二膦。本发明的另一个目标是根据将上述膦的外消旋混合物解析为光学活性异构体的工艺制备它们。
本发明的主题是新的光学活性双[1-
磷杂-2,3
-二苯基-4,5-二甲基降
冰片二烯]
二膦和一种将外消旋双[1-
磷杂-2,3
-二苯基-4,5-二甲基降
冰片二烯]
二膦混合物分解的工艺;混合物,其中包括在有机溶剂中使其与作为手性助剂的
钯或
铂络合物反应,从而形成非对映异构体络合物,然后分 解所述光学纯络合物。
本发明还涉及包含上述膦的新光学活性
金属络合物,以及它们在根据&agr;,&bgr;-不饱和
羧酸和/或衍
生物氢化工艺制备光学活性
羧酸和/或衍
生物工艺中的用途。