Crystalline sesquihydrate of...

Details Crystalline sesquihydrate of... Crystalline sesquihydrate of...

C - Chemistry, Metallurgy

07

D

260/104.5

C07D 501/04 (2006.01) A61J 3/00 (2006.01) A61K 31/545 (2006.01) C07D 249/04 (2006.01) C07D 501/20 (2006.01) C07D 501/36 (2006.01) C07D 501/60 (2006.01)

Patent

CA 1050969

ABSTRACT OF THE DISCLOSURE The specification discloses a novel cystalline sesqui- hydrate of 7-[D-a-amino-a-(p-hydroxyphenyl)acetamido]-3- (1,2,3-triazol-5-ylthiomethyl)-3 cephem-4-carboxylic acid which is particularly useful as an antibacterial agent. The specification discloses a process for the preparation of this compound, which process comprises suspending 7-[D-alpha-amino-alpha-(p-hydroxy-phenyl)aeetamido] -3-(1,2,3-triazol-5-ylthiomethyl-3- cephem-4-carboxylic acid methanol solvate in water at a pH range of approximately 2.5 - 7.0 and recovering the desired crystalline sesquihydrate product from the aqueous reaction mixture.

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