METHOD FOR CONCENTRATING ENANTIOMER OF CIS-8-BENZYL-7,9-DIOXO-2,8-DIAZABICYCLO4,3,0NONANE

摘要

PROBLEM TO BE SOLVED: To provide a method for concentrating an enantiomer of cis-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4,3,0]nonane.;SOLUTION: The method for concentrating the enantiomer of cis-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4,3,0]nonane comprises concentrating the enantiomer by continuous countercurrent chromatography named SMB-chromatography. And a method for producing (1S,6R)-8-benzyl-7,9-dioxo-2,8-diazabicyclo[4,3,0]nonane by using the above mentioned method including a racemizing process is also provided.;COPYRIGHT: (C)2004,JPO