申请人:BASF SE
公开号:US20180057437A1
公开(公告)日:2018-03-01
The present invention relates to a process for the preparation of an optically active carbonyl compound by asymmetric hydrogenation of a prochiral α,β-unsaturated carbonyl compound with hydrogen in the presence of at least one optically active transition metal catalyst that is soluble in the reaction mixture and which has rhodium as catalytically active transition metal and a chiral, bidentate bisphosphine ligand, wherein the reaction mixture during the hydrogenation of the prochiral α,β-unsaturated carbonyl compound additionally comprises at least one compound of the general formula (I):
in which
R
1
, R
2
: are identical or different and are C
6
- to C
10
-aryl which is unsubstituted or carries one or more, e.g. 1, 2, 3, 4 or 5, substituents which are selected from C
1
- to C
6
-alkyl, C
3
- to C
6
-cycloalkyl, C
6
- to C
10
-aryl, C
1
- to C
6
-alkoxy and amino;
Z is a group CHR
3
R
4
or aryl which is unsubstituted or carries one or more, e.g. 1, 2, 3, 4 or 5, substituents which are selected from C
1
- to C
6
-alkyl, C
3
- to C
6
-cycloalkyl, C
6
- to C
10
-aryl, C
1
- to C
6
-alkoxy and amino, wherein R
3
and R
4
are as defined in the claims and the description.
本发明涉及一种通过在至少一种可溶于反应混合物中的光学活性过渡金属催化剂的存在下,将可溶性光学活性过渡金属铑和手性双膦配体作为催化活性过渡金属的α,β-不对称氢化的可半手性α,β-不饱和羰基化合物与氢气反应制备光学活性羰基化合物的方法。在氢化可半手性α,β-不饱和羰基化合物的过程中,反应混合物中还包括至少一种符合一般式(I)的化合物:其中 R1、R2:相同或不同,为未取代或带有一个或多个(例如1、2、3、4或5个)C6到C10芳基取代基的化合物,所述取代基选自C1到C6烷基、C3到C6环烷基、C6到C10芳基、C1到C6烷氧基和氨基;Z是一种基团CHR3R4或未取代或带有一个或多个(例如1、2、3、4或5个)取代基的芳基,所述取代基选自C1到C6烷基、C3到C6环烷基、C6到C10芳基、C1到C6烷氧基和氨基,其中R3和R4如权利要求和说明书中定义。