Thiazolo[5,4-f]quinoline-8-carboxylic acid derivatives having either the general formula (I): ##SPC1## wherein R.sub.1 is a lower alkyl group, a lower alkenyl group or a benzyl group; or the general formula (III-a): ##SPC2## Wherein R.sub.3 is a lower alkyl group and X is a halogen atom; and methods for the preparation thereof. The compounds of the general formula (I) are useful as antibacterial agents against gram-negative and gram-positive bacteria. The compounds of the general formula (III-a) are useful as antifungal agents against eumycetes and also as an intermediate in a preparation of the compounds of the general formula (I).
具有以下通式(I)的
噻唑并[5,4-f]
喹啉-8-羧酸衍
生物:##
SPC1##
其中,R1是低碳基、低烯基或苄基;或具有以下通式(III-a)的衍
生物:##
SPC2##
其中,R3是低碳基,X是卤素原子;以及其制备方法。通式(I)的化合物对革兰氏阴性和革兰氏阳性细菌均具有抗菌作用。通式(III-a)的化合物对真菌有抗真菌作用,也可作为通式(I)化合物的中间体。