7-Substituted-3-vinyl-3-cephem compounds and processes for production of
申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US04559334A1
公开(公告)日:1985-12-17
The invention relates to novel compounds of high antimicrobial activity of the formula: ##STR1## in which R.sup.1 is amino or a protected amino group, and R.sup.2 is carboxy or a protected carboxy group, and a pharmaceutically acceptable salt thereof.
Syn-isomers of 7-substituted-3-cephem-4-carboxylic acid esters
申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US04463002A1
公开(公告)日:1984-07-31
This invention relates to novel cephem compounds of high antimicrobial activity comprising the syn-isomers of 7-substituted-3-cephem-4-carboxylic acid esters of the formula: ##STR1## wherein R is lower alkanoyloxy (C.sub.2 -C.sub.6)alkyl, isobutyryloxymethyl, 2-ethylbutyryloxymethyl or 3,3-dimethylbutyryloxymethyl, or salts thereof.
The invention provides novel antibiotic cefuroxime esters of the formula ##STR1## (wherein R.sup.1 is a primary or secondary alkyl group containing 1 to 4 carbon atoms and R.sup.2 is a primary or secondary alkyl group containing 1 to 6 carbon atoms provided that at least one of the groups R.sup.1 and R.sup.2 is methyl). These compounds are useful as orally administrable broad spectrum antibiotics.