Compounds useful as antiamebic agents are 1-(Ac.sub.1)-5-R-6-(Ac.sub.2 O)-1,2,3,4-tetrahydroquinolines (I), where Ac.sub.1 is haloacetyl, dihaloacetyl or trihaloacetyl with halo being chloro or bromo, R is hydrogen, chloro or bromo, and Ac.sub.2 is hydrogen, Ac.sub.1, alkanoyl having from one to sixteen carbon atoms, benzoyl, 2(or 3)-thenoyl, 2(or 3)-furoyl or N-(lower-alkyl)carbamoyl. Said compounds are prepared: by reacting 1,2,3,4-tetrahydro-6-quinolinol with an acyl halide of the formula Ac.sub.1 -halogen to produce 1-(Ac.sub.1)-1,2,3,4-tetrahydro-6-quinolinol having formula I where R and Ac.sub.2 are each hydrogen, Ac.sub.1 is defined as in formula I and halide is chloride or bromide; by reacting said 1-(Ac.sub.1)-1,2,3,4-tetrahydro-6-quinolinol with a chlorinating or brominating agent to produce the corresponding 1-(Ac.sub.1)-5-chloro(or bromo)-1,2,3,4-tetrahydro-6-quinolinol where Ac.sub.1 is defined as in claim 1; and, by reacting 1-(Ac.sub.1)-5-R-1,2,3,4-tetrahydro-6-quinolinol with an acylating agent providing Ac.sub.2 to produce 1-(Ac.sub.1)-5-R-1,2,3,4-tetrahydro-6-(Ac.sub.2 O)quinoline having formula I where R is hydrogen, chloro or bromo, Ac.sub.1 is defined as in formula I and Ac.sub.2 is other than hydrogen as defined in formula I.
具有抗阿米巴作用的化合物是1-(Ac.sub.1)-5-R-6-(Ac.sub.2 O)-
1,2,3,4-四氢喹啉(I),其中Ac.sub.1是卤代乙酰基,二卤代乙酰基或三卤代乙酰基,卤是
氯或
溴,R是氢,
氯或
溴,Ac.sub.2是氢,Ac.sub.1,具有一至十六个碳原子的脂肪酰基,苯甲酰基,2(或3)-
硫代苯甲酰基,2(或3)-
呋喃酰基或N-(较低烷基)
氨基甲酰基。所述化合物的制备方法包括:通过将1,2,3,4-四氢-6-
喹啉酚与式Ac.sub.1-卤素的
酰卤反应,制备具有式I的1-(Ac.sub.1)-1,2,3,4-四氢-6-
喹啉酚,其中R和Ac.sub.2分别为氢,Ac.sub.1如式I中定义,卤素为
氯或
溴;通过将所述1-(Ac.sub.1)-1,2,3,4-四氢-6-
喹啉酚与
氯化剂或
溴化剂反应,制备相应的1-(Ac.sub.1)-5-
氯(或
溴)-1,2,3,4-四氢-6-
喹啉酚,其中Ac.sub.1如权利要求1中定义;通过将1-(Ac.sub.1)-5-R-1,2,3,4-四氢-6-
喹啉酚与提供Ac.sub.2的酰化剂反应,制备具有式I的1-(Ac.sub.1)-5-R-1,2,3,4-四氢-6-(Ac.sub.2 O)
喹啉,其中R为氢,
氯或
溴,Ac.sub.1如式I中定义,Ac.sub.2不同于式I中定义的氢。