Pyridazinone derivatives, preparation thereof, and insecticidal, acaricidal, nematicidal, fungicidal compositions

Abstract From the Canadian patent

A 3(2H)-pyridazinone derivative of the general formula (I): (I), wherein, R is a straight or branched C2 - C6 alkyl A is a straight or branched C1 - C6 alkyl or a halogen atom, X is -O- or -S-, R1 and R2 are each independently hydrogen atom or C1 - C3 alkyl, B is -CH=CH-, -N=CH-, -N=N-, -S- -O- or , wherein, R3 is hydrogen or C1 - C3 alkyl Y is a halogen atom, a straight or branched C1 - C6 alkyl, a C3 - C6 cycloalkyl or cycloalkoxy a straight, or branched C1 - C6 alkoxy or alkylthio a straight or, branched C1 - C6 alkylsulfinyl or alkylsulfonyl a, C1 - C4 haloalkyl or haloalkoxy, a C1 - C4 haloalkylthio, a C2 - C4 alkenyloxy trimethylsilyl a, C1 - C4 alkoxylcarbonyl, dimethylamino nitro, …