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Title:
3-CEPHEM DERIVATIVE CRYSTAL AND METHOD FOR PREPARING THE SAME
Document Type and Number:
WIPO Patent Application WO/2001/023393
Kind Code:
A1
Abstract:
A method for preparing crystals of a 3-cephem derivative, characterized in that it comprises subjecting a 3-cephem derivative in the form of an amorphous powder or an oil to a crystallization by the use of a good solvent and a poor solvent comprising carbon dioxide in a supercritical or subcritical state, thereby giving a 3-cephem derivative in a crystaline state; and crystals of a 3-cephem derivative.

Inventors:
MORIYOSHI TAKASHI (JP)
UOSAKI YASUHIRO (JP)
KAMEYAMA YUTAKA (JP)
SUZUKI DAISUKE (JP)
SEO YOSHIKO (JP)
Application Number:
PCT/JP2000/006693
Publication Date:
April 05, 2001
Filing Date:
September 28, 2000
Export Citation:
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Assignee:
OTSUKA KAGAKU KK (JP)
MORIYOSHI TAKASHI (JP)
UOSAKI YASUHIRO (JP)
KAMEYAMA YUTAKA (JP)
SUZUKI DAISUKE (JP)
SEO YOSHIKO (JP)
International Classes:
C07D501/00; C07D501/12; C07D501/24; (IPC1-7): C07D501/12; C07D501/24
Domestic Patent References:
WO1995007283A11995-03-16
Foreign References:
EP0126351A11984-11-28
EP0319019A21989-06-07
Other References:
See also references of EP 1227100A4
Attorney, Agent or Firm:
Tamura, Iwao (Terauchi 1-chome Toyonaka-shi, Osaka, JP)
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