PROCESS FOR PREPARING OPTICALLY ACTIVE SECONDARY ALCOHOLS HAVING NITROGENOUS OR OXYGENIC FUNCTIONAL GROUPS
申请人:Asahi Kasei Kabushiki Kaisha
公开号:EP1254885A1
公开(公告)日:2002-11-06
The present invention provides a process for the preparation of an optically active secondary alcohol represented by the general formula (3):
wherein R1 represents a straight-chain lower alkyl group, an aromatic ring group, or the like; A represents CH2NR2R3, or the like; n is an integer of from 0 to 2; and * represents an asymmetric carbon atom, which comprises asymmetrically hydrogenating with selectivity among the functional groups, a ketone compound represented by the general formula (1) having a nitrogenous or oxygenic functional group at any of the α-, β- and γ-positions:
wherein R1, A and n are as defined above, using a ruthenium/optically active bidentate phosphine/diamine complex as a catalyst in the presence of hydrogen or in the presence of hydrogen and a base.
The optically active secondary alcohols obtained by the present process are useful as medicaments and intermediates for producing medicaments.
Process for preparing optically active secondary alcohols having nitrogenous or oxygenic functional groups
申请人:——
公开号:US20030045727A1
公开(公告)日:2003-03-06
A process for preparing optically active secondary alcohols of the general formula (3), [wherein R
1
is linear lower alkyl, an aromatic ring group, or the like; A is CH
2
NR
2
R
3
or the like; n is an integer of 0 to 2; and * represents an asymmetric carbon atom] by asymmetrically hydrogenating a ketone compound of the general formula (1) having nitrogenous or oxygen functional group at any of the a-, &bgr;- and &ggr;-positions, with selectivity among functional groups by the use of a ruthenium/optically active bidentate phosphine/diamine complex as the catalyst in the presence of hydrogen alone or together with a base. The optically active secondary alcohols obtained by the process are useful as drugs and intermediates for the preparation of drugs.