C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 231/20 (2006.01) A61K 31/167 (2006.01) C07C 233/69 (2006.01)
Patent
CA 2744800
The present invention relates to a method for selectively crystallizing Z isomer of iopromide of formula (I) comprising a) dissolving a crude iopromide comprising a mixture of E and Z isomers or a concentrate thereof in an alcohol, and b) heating the resulting alcohol solution to obtain crystalline of Z isomer of iopromide; and a method for preparing a composition comprising the crystalline Z isomer of iopromide.
La présente invention concerne un procédé de cristallisation sélective d'un isomère Z d'iopromide de formule (I) qui consiste : a) à dissoudre de l'iopromide brute renfermant un mélange d'isomères E et Z ou un concentré correspondant dans un alcool et b) à chauffer la solution alcoolique résultante pour obtenir l'isomère Z cristallisé d'iopromide ; et un procédé de préparation d'une composition renfermant l'isomère Z cristallin d'iopromide.
Choi Soo-Jin
Kim Wol-Young
Lee Byung-Goo
Lee Han-Kuk
Lee Joon-Hwan
Daewoong Pharmaceutical Co. Ltd.
Fasken Martineau Dumoulin Llp
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