申请人:Merck Patent Gesellschaft mit beschrankter Haftung
公开号:US04024272A1
公开(公告)日:1977-05-17
Tetracyclic compounds of the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each are H or alkyl, R.sup.5 is H, F, Cl, Br, CF.sub.3, OH, alkyl, alkoxy, NO.sub.2, NH.sub.2, alkylamino, dialkylamino or acylamino and X is O, S, SO, SO.sub.2, NH, N-alkyl or N-acyl, alkyl and alkoxy in each case being of 1-3 carbon atoms and acyl in each case being of 1-4 carbon atoms, with the proviso that when R.sup.5 is methoxy and X is a sulfur atom, R.sup.5 is in the 8- or 9-position only, and their physiologically acceptable acid addition salts, possess broad spectrum antibacterial activity, including tetracycline-resistant Gram-positive and Gram-negative organisms.
四环化合物的化学式为##STR1##其中R.sup.1、R.sup.2、R.sup.3和R.sup.4分别为H或烷基,R.sup.5为H、F、Cl、Br、CF.sub.3、OH、烷基、烷氧基、NO.sub.2、NH.sub.2、烷基氨基、二烷基氨基或酰胺基,X为O、S、SO、SO.sub.2、NH、N-烷基或N-酰基,其中烷基和烷氧基各自为1-3个碳原子,酰基各自为1-4个碳原子,但当R.sup.5为甲氧基且X为硫原子时,R.sup.5仅位于8-或9-位置,其生理上可接受的酸盐具有广谱抗菌活性,包括对四环素耐药的革兰氏阳性和阴性菌。