C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 217/18 (2006.01) A61K 31/195 (2006.01) A61P 1/14 (2006.01) A61P 1/18 (2006.01) A61P 3/04 (2006.01) A61P 3/06 (2006.01) A61P 3/10 (2006.01) A61P 13/02 (2006.01) A61P 25/24 (2006.01) A61P 43/00 (2006.01)
Patent
CA 2605381
There are provided .alpha.-, .beta.- and .gamma.-crystals produced by treating with a specified solvent 4~-{2-[(1S,2R)-2-hydroxy-2-(4-hydroxyphenyl)-1- methylethylamino]ethoxy}-3-isopropyl-3~,5~-dimethylbiphenylcarboxylic acid hydrochloride, the crystals identifiable by, for example, characteristic diffraction peaks of powder X-ray diffractometry. The crystals, especially .alpha.-, .beta.- and .gamma.-crystals, without exception are free from the problem of residual solvent, excelling in storage stability.
L'invention concerne des cristaux .alpha. , .beta. et .gamma. obtenus par traitement de l'hydrochlorure d'acide 4~-{2-[(1S,2R)-2-hydroxy-2-(4-hydroxyphényl)-1-méthyléthylamino]éthoxy}-3-isopropyl-3~,5~-diméthylbiphénylcarboxylique avec un solvant spécifique, les cristaux étant identifiables, par exemple, par leurs pics de diffraction caractéristiques par diffractométrie de rayons X sur poudre. Les cristaux, notamment les cristaux .alpha., .beta. et .gamma., sont sans exception exempts de problèmes de solvant résiduel, et présentent une excellente stabilité au stockage.
Ishikawa Takehiro
Kamata Koji
Kasai Kiyoshi
Ozawa Tetsuji
Suzuki Ritsu
Kirby Eades Gale Baker
Kissei Pharmaceutical Co. Ltd.
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