申请人:Hoechst Aktiengesellschaft
公开号:US05405844A1
公开(公告)日:1995-04-11
Tetracyclic antibiotics and processes for their preparation .beta.-Lactam antibiotics of the formula I, and their pharmaceutically tolerable salts ##STR1## where X is (CH.sub.2).sub.0-2, CR(a)R(b), O, SO.sub.0-2 or NR(c), R1, R2 and R3 are a multiplicity of substituents, are outstanding antibiotics with remarkably good antibacterial activity both against gram-positive and against gram-negative microorganisms. They have a high stability to renal dehydropeptidase. They are obtained by cyclization of the compounds II ##STR2## or III ##STR3##
四环抗生素及其制备方法。公式I的β-内酰胺类抗生素及其药学上可耐受的盐,其中X为(CH.sub.2).sub.0-2,CR(a)R(b),O,SO.sub.0-2或NR(c),R1,R2和R3为多种取代基,是出色的抗生素,对革兰氏阳性和革兰氏阴性微生物都具有非常好的抗菌活性。它们对肾脱肽酶具有高稳定性。它们通过化合物II的环化获得##STR2##或III##STR3##。