Compounds of formula:
wherein R1 is halogen or C1-3alkyl;
R3 is C1-5 alkyl, C3.5 alkenyl containing no α,β-unsaturation, C1-5 haloalkyl, C4-8 cycloalkyl, C2.S alkoxyalkyl or is phenyl optionally substituted by halogen, C1-3 haloalkyl or haloalkoxy, C1-3 alkyl or methoxy;
R4 and R6 are the same or different groups selected from hydrogen, halogen, methyl or methoxy;
m and n are the same or different and can each represent 0 or 1;
X is oxygen or sulfur; and
the nitrogen to pyridine bond is at the 2- or 3-position of the pyridine ring; provided that:
(A) both of R4 and R5 cannot be hydrogen and when one of R4 and R5 is hydrogen the other is chloro and R3 is phenyl substituted by a trifluoromethyl group;
(B) when the nitrogen to pyridine bond is at the 2-position the R2-(CH2)n-R3 group is at the 5-position; and
(C) when the nitrogen to pyridine bond is at the 3-position the R2-(CH2)nR3 group is at the 6-position; and the acid-addition salts or N-oxide thereof have been found useful as insecticides.
The compounds are prepared by the reaction of a benzoyl isocyanate or isothiocyanate with an aminopyridine.
式中的化合物
其中 R1 为卤素或 C1-3 烷基;
R3 是 C1-5 烷基、不含 α、β-不饱和度的 C3.5 烯基、C1-5 卤代烷基、C4-8 环烷基、C2.S 烷氧基烷基或任选被卤素、C1-3 卤代烷基或卤代烷氧基、C1-3 烷基或甲氧基取代的苯基;
R4 和 R6 是相同或不同的基团,选自氢、卤素、甲基或甲氧基;
m 和 n 相同或不同,可分别代表 0 或 1;
X 是氧或
硫;以及
氮与
吡啶的键位于
吡啶环的 2 位或 3 位;条件是:
(A) R4 和 R5 不能都是氢,当 R4 和 R5 中的一个是氢时,另一个是
氯,R3 是被三
氟甲基取代的苯基;
(B) 当氮
吡啶键位于 2 位时,R2-(
CH2)n-R3 基团位于 5 位;以及
(C) 当氮与
吡啶的键位于 3 位时,R2-( )nR3 基团位于 6 位;其酸加成盐或 N-氧化物可用作
杀虫剂。
这些化合物是通过异
氰酸苯甲酰酯或异
硫氰酸酯与
氨基吡啶反应制备的。