59819-52-2Relevant academic research and scientific papers
PENEM DERIVATIVES AND ANTIMICROBIAL AGENT CONTAINING THE SAME
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, (2008/06/13)
A penem derivative represented by the following formula (I): wherein R1represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted alkenylthio group, a substituted or unsubstituted aralkylthio group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted heterocyclic thio group, a substituted or unsubstituted acylthio group, a mercapto group or a hydrogen atom, and R2represents a hydrogen atom or a carboxyl-protecting group; or a pharmacologically acceptable salt thereof. The compound (I) exhibits strong antibacterial activities, and especially, shows strong activities against MRSA. It is therefore useful not only as a general antibacterial agent but also as an antibacterial agent for MRSA against which no general antibacterial agents are recognized to be effective.
Enzymatic process for 3-substituted cephalosporins
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, (2008/06/13)
6β-(3-Carboxyphenylacetylamino)-2α-substituted--2β-methylpenam-3-carboxylic acids and 6β-adipoylamino--2α-substituted-2β-methylpenam-3-carboxylic acids, wherein the α-substituent is C1-C3 alkyl, C1-C3 alkoxy, vinyl or allenyl, are converted by the enzyme deacetoxy-cephalosporin C synthetase to the 7β-(3-carboxyphenyl-acetylamino)-3-substituted-3-cephem-4-carboxylic acid and the 7β-adipoylamino-3-substituted-3-cephem-4-car-boxylic acid.
Process for preparing cephalosporin esters in the presence of liquid sulfur dioxide
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, (2008/06/13)
A process for preparing a cephalosporin ester which comprises subjecting an organic halide or an alcohol to reaction with a cephalosporin acid, a cephalosporin acid halide or a salt thereof in the presence of liquid sulfur dioxide.
