7ALFA-METOXI-7BETA-(1,3-DITIETAN-2-KARBOXAMIDO)-CEFALOSPORANSYRADERIVAT

摘要

The invention relates to novel 7 alpha -methoxycephalosporin derivatives having at the 7 beta -position an amido group acylated by a 1,3-dithietane carboxylic acid residue and to 7 beta -isothiazolylthioacetamido-7 alpha -methoxycephalosporins having antibacterial activity by themselves and, as the case may be, capable of being converted into the aforesaid 7 alpha -methoxycephalosporin derivatives. The compounds of this invention exhibit excellent antibacterial activity and are particularly effective against gram negative bacteria.