申请人:TAKASAGO INTERNATIONAL CORPORATION
公开号:US20140213792A1
公开(公告)日:2014-07-31
Disclosed is a method for producing an optically active 2-arylpiperidinium salt, comprising asymmetrically hydrogenating a pyridinium salt in the presence of an iridium complex and hydrogen, the 2-arylpiperidinium salt being represented by the following general formula (1):
wherein R
1
, R
2
, X, *, and m are as described in Description, the pyridinium salt being represented by the following general formula (2):
wherein R
1
, R
2
, X, and m are as described in Description, and the iridium complex being represented by the following general formula (3):
IrH(Z)(Q)(PP*) (3),
wherein Z, PP*, and Q are as described in Description, or the following general formula (4):
[IrH(PP*)}
2
(μ-Z)
3
]Z (4),
wherein Z and PP* are as described in Description.
本发明公开了一种制备光学活性的2-芳基哌啶盐的方法,其包括在铱络合物和氢气的存在下,对吡啶盐进行不对称氢化,所述2-芳基哌啶盐由以下通式(1)表示:其中,R1、R2、X、*和m如说明书所述,所述吡啶盐由以下通式(2)表示:其中,R1、R2、X和m如说明书所述,所述铱络合物由以下通式(3)或以下通式(4)表示:其中,Z、PP*和Q如说明书所述,或者Z和PP*如说明书所述。