A urea derivative of the general formula, ##STR1## (wherein X is a halogen), which has higher insecticidal activity than known similar compounds, with lowered toxicity to mammals and fishes. The derivative can be produced by reacting 2-fluoro-4-haloaniline with 2,6-difluorobenzoyl isocyanate or reacting 2-fluoro-4-halo-phenylisocyanate with 2,6-difluorobenzamide.
一种
尿素衍
生物的一般公式为##
STR1##(其中X是卤素),其具有比已知类似化合物更高的杀虫活性,对哺乳动物和鱼类的毒性降低。该衍
生物可通过将2-
氟-4-卤
苯胺与
2,6-二氟苯甲酰异氰酸酯反应或将2-
氟-4-卤
苯异氰酸酯与
2,6-二氟苯甲
酰胺反应来制备。