Cephem compounds and processes for preparation thereof
申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US04703046A1
公开(公告)日:1987-10-27
This invention concerns antibiotic cephalosporins of the formula ##STR1## wherein R.sup.1 is amino or protected amino; R.sup.2 is halogen; R.sup.3 is alkyl; and R.sup.6 is carboxy or protected carboxy.
The invention relates to new thiadiazolyl or thiazolyl-substituted cephem and cepham compounds, the pharmaceutically acceptable salts and bioprecursors thereof, of antimicrobial activity, processes for preparation thereof, intermediates for preparing the new compounds and to pharmaceutical compositions comprising the new compounds, and methods of using the compositions for treatment of infectious diseases.
This invention relates to novel 7-thiadiazol-oxyimino-3-cephem and cepham 4-carboxylic acid compounds of high antimicrobial activity.
这项发明涉及具有高抗微生物活性的新型7-噻二唑氧肟基-3-头孢菌素和头孢菌素-4-羧酸化合物。
7-Amino-thiadiazole oxyimino derivatives of cephem and cepham compounds
申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US04381299A1
公开(公告)日:1983-04-26
This invention relates to new cephem and cepham compounds of high antimicrobial activity, and more particularly to new 7-amino-thiadiazole oxyimino derivatives of cephem and cepham compounds.
7-Amino-thia-diazole oxyimino derivatives of cephem and cephem compounds
申请人:Fujisawa Pharmaceutical Co., Ltd.
公开号:US04332798A1
公开(公告)日:1982-06-01
7-Substituted-3-cephem and cepham-4-carboxylic acids of formula (I) ##STR1## wherein R.sup.1 is amino or a protected amino, R.sup.2 is hydrogen, acyl, aryl which may be substituted with suitable substituent(s), lower alkyl substituted with suitable substituent(s), lower alkenyl, lower alkynyl, cycloalkyl which may be substituted with suitable substituent(s), cyclo(lower)alkenyl, or S- or O-containing 5-membered heterocyclic group substituted with oxo group(s). R.sup.3 is hydrogen or lower alkyl, R.sup.4 is hydrogen; acyloxy(lower)alkyl; acylthio(lower)alkyl pyridinium(lower)alkyl which may be substituted with suitable substituent(s); a heterocyclicthio(lower)alkyl which may be substituted with suitable substituent(s); lower alkyl; halogen; or hydroxy; and R.sup.5 is carboxy or a protected carboxy wherein R.sup.5 is COO-- when R.sup.4 is pyridinium(lower)alkyl which may be substituted with suitable substituent(s), and the heavy solid line means single or double bond, have useful antibiotic properties.