Pyridazinone derivatives, preparation thereof and...

C - Chemistry – Metallurgy – 07 – D

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C07D 237/18 (2006.01) A01N 43/58 (2006.01) C07D 401/12 (2006.01) C07D 403/12 (2006.01) C07F 7/08 (2006.01)

Patent

CA 1255676

ABSTRACT Novel 3(2H)-pyridazinone derivatives having the formula I: Image (I) wherein, R is a straight or branched C2 to C6 alkyl, R1 and R2 are each independently hydrogen or a lower alkyl, R4 is a halogen, R3 is a halogen, an alkyl, a cycloalkyl, an alkoxy, a haloalkyl, a haloalkoxy, -CN, -NO2, a phenyl, a benzyloxyy, a benzyl, a phenoxy, a phenylthio, a pyridyloxy, a quinoxalyloxy, a lower alkenyloxy, a lower alkylthio, a lower haloalkylthio, - Si(CH3)3, -OH, -N(CH3)2, -SCN, -COOCH3 or -OCH(CH3)COOC2H5, and n is an integer of 1 to 5, said R3 being the same or different when n is an integer of 2 to 5. A process for 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.

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