The present invention relates to compounds represented by the formula:
wherein R1 is (1) an optionally substituted alkyl group which may be bonded through a hetero atom, (2) an optionally substituted acyl group, (3) an alkylsulfonyl group, (4) an alkylsulfinyl group, or (5) an optionally substituted sulfamoyl group; A is -N= or -CH=; R2 is a hydrogen atom or an alkyl group which may optionally be substituted with halogen and which may be bonded through a hetero atom;
X1 is halogen or a lower alkyl group;
X2 is a hydrogen atom or a fluorine atom;
R3 is a hydrogen atom, halogen or a lower alkyl group;
and R4 is a hydrogen atom, an optionally substituted alkyl group or an acyl group, provided that when R1 is (1) a C1-4 alkanoyl group, (2) benzoyl, (3) trifluoroacetyl, (4) sulfamoyl which may optionally be substituted with a C1-4 alkyl group, (5) a C1-4 alkyl group which may optionally be substituted with hydroxy, halogen or a C1-3 alkoxy group, (6) amino which is substituted with a C1-4 alkyl group, A is -CH=, R2 is a hydrogen atom, X1 is a chlorine atom, R3 is a chlorine atom, and X2 is a hydrogen atom, then R4 is an optionally substituted alkyl group or an optionally substituted acyl group; or salts thereof, their production and use thereof. These compounds and salts thereof are useful as anti-protozoal agents.
本发明涉及由式表示的化合物:
其中R1是(1)任选取代的烷基,该烷基可通过杂原子键合,(2)任选取代的酰基,(3)烷基磺酰基,(4)烷基亚磺酰基,或(5)任选取代的
氨基磺酰基;A是-N=或-CH=;R2是氢原子或烷基,该烷基可任选被卤素取代,并可通过杂原子键合;
X1 是卤素或低级烷基;
X2 是氢原子或
氟原子;
R3 是氢原子、卤素或低级烷基;
R4是氢原子、任选取代的烷基或酰基,但当R1是(1)C1-4烷酰基,(2)苯甲酰基,(3)三
氟乙酰基,(4)可任选被C1-4烷基取代的
氨基磺酰基,(5)可任选被羟基、卤素或C1-3烷基取代的C1-4烷基、(6) 被 C1-4 烷基取代的
氨基,A 为-CH=,R2 为氢原子,X1 为
氯原子,R3 为
氯原子,X2 为氢原子,则 R4 为任选取代的烷基或任选取代的酰基;或其盐类,以及它们的生产和使用。这些化合物及其盐类可用作抗原虫制剂。