申请人:Tokyo Tanabe Co. Limited
公开号:US04720495A1
公开(公告)日:1988-01-19
Benzo[ij]quinolizine-2-carboxylic acid derivatives of the general formula [I] and the salts, and their hydrates are provided: ##STR1## wherein A is a methylene group and B is a carbonyl group when A and B are linked by a single bond, or A and B unite together to form a vinylene group when A and B are linked by a double bond, R.sup.1 is a hydrogen atom, a C.sub.1-3 alkyl group or a 2-hydroxyethyl group, R.sup.2 and R.sup.3 are hydrogen atoms, methyl groups or ethyl groups and may be identical to or different from each other, R.sup.3 may be attached to the same carbon atom as R.sup.2, R.sup.4 is a methyl or ethyl group, and X is a halogen atom. The benzo[ij]quinolizine-2-carboxylic acid derivatives and the salts, and their hydrates have good adsorbability from the digestive tract into the circulating blood and exhibit excellent and long-lasting antibacterial activity.
提供一般式[I]的苯并[ij]喹啉-2-羧酸衍生物及其盐和水合物:其中A是一个亚甲基基团,B是一个羰基团,当A和B通过单键连接时,或者A和B通过双键连接时结合成乙烯基团,R.sup.1是氢原子,C.sub.1-3烷基基团或2-羟乙基基团,R.sup.2和R.sup.3是氢原子,甲基基团或乙基基团,可以相同也可以不同,R.sup.3可以连接到与R.sup.2相同的碳原子上,R.sup.4是甲基或乙基基团,X是卤素原子。苯并[ij]喹啉-2-羧酸衍生物及其盐和水合物具有良好的从消化道吸收到循环血液中的能力,并表现出优异且持久的抗菌活性。