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型
双膦化合物,其
磷原子上具有手性中心,适用于不对称氢化反应中的不对称催化剂的
配体,该
双膦化合物由以下式子(1)表示:(其中t-
C8H17表示1,1,3,3-四甲基丁基),以及制备该
双膦化合物的方法。还提供了以该
双膦化合物为
配体的过渡
金属配合物,以及对未取代
羧酸或其酯进行不对称氢化的方法。