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发明授权
US4837217A Pyridazinone derivatives, preparation thereof, and insecticidal, acaricidal, nematicidal, fungicidal compositions 失效
哒嗪酮衍生物，其制备方法和杀虫，杀螨，杀线虫剂，杀真菌剂组合物

Pyridazinone derivatives, preparation thereof, and insecticidal, acaricidal, nematicidal, fungicidal compositions
摘要：
A 3(2H)-pyridazinone derivative of the general formula (I): ##STR1## wherein R is a straight or branched C.sub.2 -C.sub.6 alkyl,A is a straight or branched C.sub.1 -C.sub.6 alkyl or a halogen atom,X is --O-- or --S--,R.sup.1 and R.sup.2 are each independently hydrogen atom or C.sub.1 -C.sub.3 alkyl,B is --CH.dbd.CH--, --N.dbd.CH--, --N.dbd.N--, --S--, --O-- or ##STR2## wherein R.sup.3 is hydrogen or C.sub.1 -C.sub.3 alkyl, Y is a halogen atom, a straight or branched C.sub.1 -C.sub.6 alkyl, a C.sub.3 -C.sub.6 cycloalkyl or cycloalkoxy, and other substituents,n is 0 or an integer of 1 to 3, and when n is 2 or 3, Y may be same or different, with the proviso that when B is --CH.dbd.CH--, n is an integer of 1 to 3 and at least one of Y is --O--W, as this term is defined in the specification.A process for the preparation of said derivatives is also provided. These derivatives are useful as an active ingredient of insecticidal, acaricidal, nematicidal and/or fungicidal compositions for agricultural and horticultural uses as well as of expellent compositions for ticks parasitic on animals.
摘要（中）：

通式（I）的3（2H） - 哒嗪酮衍生物：其中R是直链或支链C 2 -C 6烷基，A是直链或支链C 1 -C 6烷基或卤素原子，X是-O - 或-S-，R1和R2各自独立地为氢原子或C1-C3烷基，B为-CH = CH-，-N = CH-，-N = N-，-S-，-O-或

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