127108-53-6Relevant articles and documents
Cephem compounds and a production method therefor
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, (2008/06/13)
The invention relates to cephem compounds or salts thereof of the formula: [in the formula, R1 denotes hydrogen or an amino protective group, R2 denotes an unsubstituted or substituted alkyl group, X denotes an O-bonded group or S-bonded group, and M1 denotes hydrogen, carboxyl protective group or a cation and, as COOM1, a car-boxylate ion, and R3 denotes a group represented by the formula: (in the formulae, Y1 and Y2 are identical or dif-ferent and denote hydrogen, alkyl groups, halogen groups, hydroxyl groups or oxo groups, R denotes an alkyl group, and the bonding partner of the -X- group is positioned in the 1-position, 3-position or 4-position of the pyridine ring (but excluding the 1-position in the case of the pyridinium ring and the pyridine N-oxide ring)) (but excluding groups represented by the formula (II b) when X is an S--bonded group,], methods of making such compounds and antimicrobial agents incorporating them.