Process for preparing monohydrate...

Details Process for preparing monohydrate... Process for preparing monohydrate...

C - Chemistry, Metallurgy

07

D

260/101.5

C07D 501/06 (2006.01) C07D 501/00 (2006.01) C07D 501/59 (2006.01)

Patent

CA 2028954

- 1 - ABSTRACT PROCESS FOR PREPARING MONOHYDRATE 7-(D-2-AMINO-2-PHENYLACETA- MIDO)-3-CEFEM-4-CARBOXYLIC ACID AND INTERMEDIATE FORMED IN THE PROCESS. Process for preparing monhydrate 7-(D-2-amino-2-phenyl- acetamido)-3-chloro-3-cefem-4-carboxilic acid, comprising the condensation between silanized 7-amino-3-chloro-cephalospora- nic acid and D(-)-phenylglycine chloride hydrochloride in the presence of a proton acceptor, such condensation yields a product which precipitates in form of solvate of aceto- nitrile, from which the final product is obtained by known techniques, said process allowing to obtain higher yields and a purer product.

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