Crystalline calcium di-clavulanate dihydrate

Details Crystalline calcium di-clavulanate dihydrate Crystalline calcium di-clavulanate dihydrate

C - Chemistry, Metallurgy

07

D

260/299

C07D 498/04 (2006.01) C07D 503/00 (2006.01)

Patent

CA 1079736

ABSTRACT OF THE DISCLOSURE A process is disclosed for the preparation of crystalline calcium di-clavulanate dihydrate by contacting an aqueous solution of a salt of clavulanic acid other than the calcium salt, with a cation exchange resin in the calcium form and eluting the thus formed calcium di-clavulanate from the resin to yield a solution of calcium di-clavulanate substantially free from cations other than calcium and thereafter causing the crystallisation of the calcium di-clavulanate dihydrate from solution and isolating the desired cystalline salt. Pharmaceutical preparations containing the salt are disclosed as well and may contain a penicillin or cephalosporin in addition to the salt.

272740

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