Toward the development of a general chiral auxiliary. 1. Preparation of a new class of camphor lactam imides and their application to the construction of quaternary centers via Diels-Alder cycloaddition.
PROCESS FOR PRODUCING OPTICALLY ACTIVE CARBOXYLIC ACID
申请人:Daiichi Sankyo Company, Limited
公开号:EP2368870A1
公开(公告)日:2011-09-28
It has been demanded to provide a process for industrially producing an intermediate for a compound that exhibits an inhibitory effect on activated blood coagulation factor X and is useful as a preventive and/or therapeutic agent for thrombotic diseases. The present invention provides a process for producing the (R-α-phenylethylamine salt of (S)-3-cyclohexene-1-carboxylic acid, comprising reacting 3-cyclohexene-1-carboxylic acid and (R)-α-phenylethylamine using a mixed solvent of water and acetone or a mixed solvent of water and ethyl acetate as a solvent.
Toward the development of a general chiral auxiliary. 1. Preparation of a new class of camphor lactam imides and their application to the construction of quaternary centers via Diels-Alder cycloaddition.
作者:Robert K. Boeckman、Scott G. Nelson、Michael D. Gaul