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NOUVEAUX DERIVES DE PYRIDINIUM THIOMETHYL CEPHALOSPORIN PROCEDE POUR LEUR PREPARATION,PROCEDE POUR LEUR PREPARATION ET COMPOSITIONS PHARMACEUTIQUES LES CONTENANT
NOUVEAUX DERIVES DE PYRIDINIUM THIOMETHYL CEPHALOSPORIN PROCEDE POUR LEUR PREPARATION,PROCEDE POUR LEUR PREPARATION ET COMPOSITIONS PHARMACEUTIQUES LES CONTENANT
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机译：吡啶硫酚头孢菌素的新制备方法，制备方法和含有它们的药物组合物
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摘要
The present invention relates to cephalosporins of general formula: IMAGE in which: R1 is H or CH3, R2 is CH3, or R1 and R2 taken together form a 1,3-propylene group, R3 is lower alkyl, alkenyl, alkynyl or CH2COO alkyl, R4 is H or OH, the S being bonded to the pyridine ring in 2 or 4 position, A is H or cation or ester or hemiacetal which is easily hydrolyzable, and X is a derivative of a mineral or organic acid. The invention also relates to a process for preparing these new cephalosporins and to the drugs containing said cephalosporins.
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