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##
四环素类抗生素及其制备方法。公式I的β-内酰胺抗生素及其药物耐受盐,其中X为(CH2)0-2、CR(a)R(b)、O、SO0-2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显著的良好抗菌活性。它们对肾脏脱氢肽酶具有高稳定性。它们通过化合物II的环化获得。