New broad-spectrum parenteral cephalosporins exhibiting potent activity against both methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa. Part 2: Synthesis and structure–activity relationships in the S-3578 series
摘要:
Among the prepared novel cephalosporin derivatives related to S-3578, a series of 7beta-[2-(5-amino-1,2,4-thiadiazol-3-yl)-2(Z) -ethoxyiminoacetamido]-3-[1-(aminoalkyl)-1H-pyrazoIo[4,3-b]pyridinium-4-yl]methyl-3-cephem-4-carboxylate showed potent activity against both MRSA and Pseudomonas aeruginosa, and displayed good water solubility. (C) 2004 Elsevier Ltd. All rights reserved.
3-Bromo-4-nitropyridine N-oxide behaves as a useful substrate for causing nucleophilic substitution at the P-position (3-position) with arnines to afford 3-aminopyridine derivatives. (c) 2007 Elsevier Ltd. All rights reserved.