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Toyama Chemical Co Ltd
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Toyama Chemical Co Ltd
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Publication date
Application filed by Toyama Chemical Co LtdfiledCriticalToyama Chemical Co Ltd
Priority to ES458846ApriorityCriticalpatent/ES458846A1/en
Publication of ES458846A1publicationCriticalpatent/ES458846A1/en
A procedure for the preparation of new cephalosporins of general formula (I) *** where R1 represents a hydrogen atom, a salt-forming cation or a blocking group and R2 represents an acetoxy, carbamoyloxy, 2- (5-methyl group -1,3,4-thiadiazolyl) thio or 5- (1-methyl-1,2,3,4-tetrazolyl) thio, the procedure of which is to react a compound represented by the general formula (II): *** (Machine-translation by Google Translate, not legally binding)
ES458846A1977-05-161977-05-16A procedure for the preparation of new cephalosporins. (Machine-translation by Google Translate, not legally binding)
ExpiredES458846A1
(en)
A procedure for the preparation of new derivatives of 2-alkyl (bottom) -2 or 3-cefem-4-carboxylic acid. (Machine-translation by Google Translate, not legally binding)