Method for manufacturing tricyclic amino alcohol derivatives
申请人:Asahi Kasei Kabushiki Kaisha
公开号:US06495701B1
公开(公告)日:2002-12-17
The present invention is directed to processes for the preparation of a compound useful for treating diabetes, obesity, hyperlipidemia and the like, which compound is represented by the formula (1):
wherein R1 represents a lower alkyl group or a benzyl group; *1 represents an asymmetric carbon atom; R2 hydrogen atom, a halogen atom or a hydroxyl group; and A represents one of the following groups:
wherein X represents NH, O or S; R6 represents a hydrogen atom, a hydroxyl group, an amino group or an acetylamino group; and *2 represents an asymmetric carbon atom when R6 is not a hydrogen atom, and to intermediates useful for the said processes. The processes of the present invention are convenient, practical preparing processes with low cost which comprise a small number of steps with good industrial work efficiency.
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.
NOVEL METHOD FOR MANUFACTURING TRICYCLIC AMINO ALCOHOL DERIVATIVES
申请人:Asahi Kasei Kabushiki Kaisha
公开号:EP1174425A1
公开(公告)日:2002-01-23
The present invention is directed to processes for the preparation of a compound useful for treating and preventing diabetes, obesity, hyperlipidemia and the like, which compound is represented by the formula (1) :
wherein R1 represents a lower alkyl group or a benzyl group; ∗1 represents an asymmetric carbon atom; R2 represents a hydrogen atom, a halogen atom or a hydroxyl group; and A represents one of the following groups:
wherein X represents NH, O or S; R6 represents a hydrogen atom, a hydroxyl group, an amino group or an acetylamino group; and ∗2 represents an asymmetric carbon atom when R6 is not a hydrogen atom, and to intermediates useful for the said processes. The processes of the present invention are convenient, practical preparing processes with low cost which comprise a small number of steps with good industrial work efficiency.
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.