A ruthenium-optically active phosphine complex has, as a ligand, BICHEP, i.e., 2,2′-bis(dicyclohexyl-phosphino)-6,6′ dimethyl-1,1′-biphenyl represented by formula (I):
Specific examples of the complex are:
[Ru(BICHEP](OAc)₂ (wherein Ac is an acetyl group)
[Ru(BICHEP)(p-cymene)I]I
[Ru(BICHEP)(p-cymene)Cl]Cl
(Ru₂Cl₄(BICHEP)₂]NEt₃ (wherein Et is an ethyl group).
Preparation is by the processes of US-4739084, EP-A-366,390 and US-4691037. Preparation of optically active BICHEP is described.
The complex is used to catalyse assymmetric syntheses, e.g. of an optically active carboxylic acid or ester in high purity and good yield.
一种
钌光活性膦络合物的
配体为 BICHEP,即
2,2′-双(
二环己基膦)-6,6′ 二
甲基-1,1′-
联苯,由式(I)表示:
复合物的具体例子如下
[Ru(BICHEP](
OAc)₂(其中 Ac 为
乙酰基)
[Ru(BICHEP)(
对伞花烃)I]I
[Ru(BICHEP)(对-亚
甲基)Cl]Cl
(Ru₂Cl₄(BICHEP)₂]NEt₃(其中 Et 为乙基)。
制备方法见 US-4739084、EP-A-366,390 和 US-4691037。介绍了光学活性 BICHEP 的制备方法。
该复合物可用于催化不对称合成,例如高纯度和高产率的光学活性
羧酸或
酯的合成。