Abstract: Levetiracetam is prepared by optical resolution of etiracetam by means of preparative high performance liquid chromatography or continuous simulated moving bed chromatographic system using silica gel supporting amylose tris(3,5-dimethylphenylcarbamate) as a packing material.
Type:
Grant
Filed:
May 7, 1999
Date of Patent:
August 22, 2000
Assignees:
UCB, S.A., Daicel Chemical Industries, Ltd.
Inventors:
Tooru Futagawa, Jean-Pierre Canvat, Emile Cavoy, Michel Deleers, Michel Hamende, Vincent Zimmermann