C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
167/187, 260/104
C07D 501/46 (2006.01) A61K 31/40 (2006.01) A61K 31/425 (2006.01) A61K 31/545 (2006.01) A61K 47/00 (2006.01) A61K 47/18 (2006.01) C07D 501/00 (2006.01) C07D 501/04 (2006.01) C07D 501/38 (2006.01) C07D 501/56 (2006.01) C07D 501/60 (2006.01)
Patent
CA 1298288
A B S T R A C T Crystalline sulfuric, di-nitric, mono-hydrochloric, di- hydrochloric, and di- and sesqui-orthosphosphoric acid addition salts of 7-[.alpha.-(2-aminothiazol-4-yl)-.alpha.-(Z)-methoxyimino- acetamido]-3-[(1-methyl-1-pyrrolidinio)methyl]-3-cephem-4- carboxylate are stable even at elevated temperatures. The crystalline sulfuric acid addition salt is made by forming an admixture of (a) at least one molar equivalent of sulfuric acid with (b) zwitterion in an amount so as to be present in the admixture at a concentration of greater than 25 milligrams/ml, causing crystallization, separating the crystals, washing and drying. The crystalline monohydrochloride, dihydrochloride, and orthophosphate salts are prepared by dissolving the zwitterion in the appropriate amount of acid, causing crystallization by adding acetone and isolating the crystals. Physical admixtures of the salts with certain bases in proportions to give a pH ranging from about 3.5 to about 7 on dilution with water provide injectable compositions on dilution.
588576
Boettger Susan D.
Hudyma Thomas W.
Kaplan Murray Arthur
Lipper Robert Alan
Shih Kun Mao
Bristol-Myers Squibb Company
Cassan Maclean
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