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.
公式(I)的7-取代-3-头孢菌素和头孢烯-4-羧酸如下:
其中R.sup.1是氨基或受保护的氨基,R.sup.2是氢、酰基、芳基,可能被适当取代的取代基、被适当取代的低烷基、被适当取代的低烯基、被适当取代的低炔基、可能被适当取代的环烷基、环(低)烯基,或者含有氧或硫的5-成员杂环基,被氧代基取代。R.sup.3是氢或低烷基,R.sup.4是氢、酰氧基(低)烷基、硫酰基(低)烷基、吡啶基(低)烷基,可能被适当取代的杂环硫基(低)烷基,被适当取代的低烷基、卤素或羟基;R.sup.5是羧基或受保护的羧基,其中当R.sup.4是可能被适当取代的吡啶基(低)烷基时,R.sup.5是COO--,而粗实线表示单键或双键,具有有用的抗生素性能。