A process for the production of 7-[2-(2-amino-4-thiazolyl)-2-syn-methoxyimino-acetamido]-3-acetoxymethyl-3-cephem-4-carboxylic acid (Cefotaxime) in aqueous isopropyl alcohol is provided. The synthesis provides the product in greater than 99 % HPLC purity.
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Page/Page column 4
(2008/06/13)
An improved method for preparation of cefpodoxime proxetil
Cefpodoxime proxetil, a third-generation cephalosporin for oral administration, was synthesized by a method based on the following sequence of reactions: acylation of 7-aminocephalosporanic acid (7-ACA) with S-benzothiazol-2-yl(2-amino-4-thiazolyl)(methoxyimino)thioacetate (MAEM), chloroacetylation of the cefotaxime formed with chloroacetyl chloride, esterification of the acid function with 1-iodoethyl isopropyl carbonate and final cleavage of chloroacetamide protective group by treatment with thiourea in N,N-dimethylacetamide. The developed procedure allows us to obtain better yields of cefpodoxime proxetil and to eliminate the final purification step by column chromatography, necessary during the synthesis of this antibiotic by the previously reported methods.
Rodriguez, Juan C.,Hernandez, Ricardo,Gonzalez, Maritza,Rodriguez, Zalua,Tolon, Blanca,Velez, Herman,Valdes, Barbara,Lopez, Miguel A.,Fini, Adamo
p. 363 - 369
(2007/10/03)
Cephalosporin derivatives
The present invention relates to novel cephalosporin derivatives, processes for preparing thereof, compositions for preventing and/or treating infectious diseases which comprise the novel cephalosporin derivatives as active components, and the intermediate compounds in the synthesis of cephalosporin derivatives and processes for producing thereof. The novel cephalosporin derivatives according to the present invention contain condensed heterocyclic groups, particularly a triazolopyrimidine ring or a thiadiazolopyrimidine ring as substituents at the 3-position of the cephem skeleton, and a hydroxyimino, an alkyloxyimino or an acyloxyimino moiety as substituents at the 7-position of the cephem skeleton. The compounds of the present invention containing the aforementioned substituents have a strong antibacterial activity against gram-negative bacteria and also against gram-positive bacteria including methicillin-resistant Staphylococcus aureus. These compounds are extremely useful for the treatment of infectious diseases.
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(2008/06/13)
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