C - Chemistry – Metallurgy – 07 – K
Patent
C - Chemistry, Metallurgy
07
K
260/114.1
C07K 5/06 (2006.01) C07D 499/00 (2006.01)
Patent
CA 1286285
Abstract: The present invention is directed to a stable trihydrate of (2S, 5R, 6R)-6-{(2R)-2-[(2R)-2-amino-3-(N-methylcarbamoyl) propionamido]-2-(p-hydroxyphenyl)-acetamido}-3,3-dimethyl- 7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid and process for its preparation. The trihydrate can be prepared by adjusting the pH of a solution of (2S,-5R, 6R)- 6-{(2R)-2-[(2R)-2-amino-3-1N-methylcarbamoyl)-propionamido] -2-(p-hydroxyphenyl)acetamido} -3,3-dimethyl-7-oxo-4-thia- 1-azabicyclo[3.2.0]heptane-2-carboxylic acid or a salt thereof in an aqueous medium to 3 to 6 and crystallizing the desired trihydrate.
547616
Ohshiro Susumu
Senuma Masaru
Wagatsuma Mitsuyoshi
Kirby Eades Gale Baker
Tanabe Seiyaku Co. Ltd.
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