Patent ID: 6630495
Filing Date: 2003-10-07
Classification: A01N

Abstract:
A method of preventing or reducing phytopathogen infestation at a locus in need of such prevention or reduction comprising the step of contacting said locus with at least one compound of formula (I) or (II) or a salt thereof: whereinA1 is a 2-pyridyl or its N-oxide, each of which may be substituted by up to four groups at least one of which is haloalkyl; A2 is heterocyclyl or carbocyclyl, each of which may be substituted; R1 and R2, which may be the same or different, are Rb, cyano, nitro, halogen, â€”ORb, â€”SRb or optionally substituted amino, or R1 or R2 together with the carbon to which they are attached may form a 3-, 4-, 5- or 6-, carbo- or heterocyclic ring, which may be substituted; R3 is Rb, â€”ORb, or â€”N(Rb)2, cyano, N-substituted iminomethyl or nitro; or R3 and A2, together with the interconnecting atoms, may for a 5- or 6-membered ring; L is â€”C(&boxH;X)â€” or â€”SO2â€”, where X is oxygen, sulfur, Nâ€”ORb, Nâ€”Rb or Nâ€”N(Rb)2; and Y is halogen, â€”ORb, â€”SRb, â€”N(Rb)2, â€”NRb(ORb) or â€”NRbN(Rb)2; and Rb, which may be the same or different is alkyl, alkenyl, alkynyl, carbocyclyl or heterocyclyl, each of which may be substituted; or hydrogen or acyl, or two adjacent Rb groups together with the interconnecting atoms, may form a 5- or 6-membered ring; with the proviso that when A1 is 2-pyridyl, R1 is hydrogen, R2 is hydrogen, optionally substituted alkyl or acyl, L is â€”C(&boxH;X)â€” or â€”SO2â€”, X is oxygen or sulfur and R3 is hydrogen or optionally substituted alkyl, A2 is not optionally substituted phenyl.