The present invention provides a novel bisphosphine compound having a chiral center on the phosphorus atom, which is suitable as a ligand for an asymmetric catalyst for use in asymmetric hydrogenation, this bisphosphine compound being represented by the following formula (1):
(where t—C8H17 denotes 1,1,3,3-tetramethylbutyl), and a process for the production of this bisphosphine compound. Also provided are a transition metal complex having this bisphosphine compound as a ligand, and a process for the asymmetric hydrogenation of an unsubstituted carboxylic acid or its ester.
本发明提供了一种新颖的具有
磷原子上手性中心的双
磷化合物,该化合物适合作为用于非对称氢化的非对称催化剂的
配体,该双
磷化合物由以下公式(1)表示:
(其中t—
C8H17表示1,1,3,3-四甲基丁基),以及这种双
磷化合物的制备方法。还提供了一种以这种双
磷化合物为
配体的过渡
金属复合物,以及一种未取代
羧酸或其酯的非对称氢化的方法。