| 摘要 |
<p>Novel oximes of the syn isomers of 7-[2-(2-amino-4-thiazolyl)-acetamido]ceph-3-eme-4-carboxylic acid compounds of the fomrula <IMAGE> I' wherein B is -(CH2)n'-R5, n' is an integer from 1 to 4, R5 is <IMAGE> R6 and R7 are individually selected from the group consisting of hydrogen and alkyl of 1 to 4 carbon atoms and when taken together with the nitrogen to which they are attached are selected from the group consisting of phthalimido and 1-pyridinyl, R1 is selected from the group consisting of chloro, CH3O-, alkyl and alkylthio of 1 to 5 carbon atoms, cycloalkyl of 3 to 5 carbon atoms, -CH2-S-R12, acetoxymethyl, carbamoyloxymethyl and <IMAGE> R12 is selected from the group consisting of 2-oxo-(3H)-thiazolin-4-yl-carbonyl, 3-methyl-1,2-oxazol-5-yl-carbonyl, acyl of an alkanoic acid of 2 to 4 carbon atoms and a nitrogen heterocycle, Alka is alkyl of 1 to 4 carbon atoms and A is selected from the group consisting of hydrogen, -NH4, alkali metal, alkaline earth metal, magnesium, a non-toxic, pharmaceutically acceptable organic amine and easily cleaved ester and their non-toxic, pharmaceutically acceptable acid addition salts; having antibacterial activity and novel intermediates therefore.</p> |
