Derivatives of N-phenylpyrazoles

CAFC
  • US 5,232,940 A
  • Filed: 05/07/1990
  • Issued: 08/03/1993
  • Est. Priority Date: 12/20/1985
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for the control or arthropod, plant nematode or helminth pests at a locus which comprises treatment of the locus with a pesticidally effective amount of a compound of the formula:

  • wherein;

    R2 represents a halogen atom, the cyano or nitro group or a group R'"'"'SO2, R'"'"'SO or R'"'"'S in which R'"'"' represents a straight- or branched-chain alkyl group having from 1 to 6 carbon atoms which is unsubstituted or substituted by one or more halogen atoms, a cycloalkyl group having from 3 to 5 carbon atoms, a straight- or branched-chain alkenyl group having from 2 to 6 carbon atoms, or R2 represents the thiocyanato group, the sulphamoyl group which is unsubstituted or substituted by one or two straight- or branched-chain alkyl groups which may be the same or different and which have from 1 to 6 carbon atoms, the carbamoyl group which may be unsubstituted or substituted by one or two straight- or branched-chain alkyl groups which may be the same or different and which have from 1 to 6 carbon atoms, a straight- or branched-chain alkoxycarbonyl group having from 2 to 7 carbon atoms, a straight- or branched-chain alkanoyl group having from 2 to 7 carbon atoms, or a straight- or branched-chain alkyl group having from 1 to 6 carbon atoms which is unsubstituted or substituted by one or more halogen atoms;

    R3 represents the hydrogen atom, or the amino group --NR"R"'"'"' wherein R" and R"", which may be the same or different, each represent a hydrogen atom or a straight- or branched-chain alkyl group (having from 1 to 6 carbon atoms, and which is unsubstituted or substituted by straight- or branched-chain alkoxycarbonyl of 2 to 5 carbon atoms), cycloalkyl group having from 3 to 6 carbon atoms, formyl group, straight- or branched-chain alkanoyl group (which has from 2 to 7 carbon atoms or together form a 5- or 6-membered cyclic imide with the nitrogen atom to which they are attached and themselves are unsubstituted or substituted by one or more halogen atoms) or cycloalkylcarbonyl group (which has from 4 to 7 carbon atoms) or straight- or branched-chain alkoxycarbonyl group (which has from 2 to 7 carbon atoms and themselves are unsubstituted or substituted by one or more halogen atoms), or R3 represents a straight- or branched-chain alkylsulphenylamino group having from 1 to 4 carbon atoms, a straight- or branched-chain alkoxymethyleneamino group having from 2 to 5 carbon atoms which is unsubstituted or substituted on methylene by a straight- or branched-chain alkyl group having from 1 to 4 carbon atoms, or represents a halogen atom, a straight- or branched-chain alkyl group having from 1 to 4 carbon atoms, the carboxy group, or a straight- or branched-chain alkylthio, alkylsulphinyl or alkylsulphonyl group having from 1 to 6 carbon atoms which is unsubstituted or substituted by one or more halogen atoms, or represents a straight- or branched-chain trialkylsilylmethyl group having from 1 to 6 carbon atoms in each alkyl group which may be the same or different, a trialkylsilyl group having from 1 to 6 carbon atoms in each alkyl group which may be the same or different or the cyano or nitro group;

    R4 -R8 each represent a hydrogen atom, a halogen atom, a straight- or branched-chain alkyl or alkoxy group having from 1 to 4 carbon atoms which is unsubstituted or substituted by one or more halogen atoms, a straight- or branched-chain alkylthio or alkylsulphinyl group having from 1 to 4 carbon atoms which is substituted by one or more halogen atoms, the nitro or cyano group or a straight- or branched-chain alkylsulphonyl group having from 1 to 4 carbon atoms which is unsubstituted or substituted by one or more halogen atoms, provided that at least one of R4 -R8 must be other than a hydrogen atom; and

    R1 represents a halogen atom, or a cyano or nitro group;

    or when R3 represents a carboxy group, a slat thereof with a pesticidally acceptable base;

    provided that R1, R2 and R3 do not simultaneously represent three groups of the same genus selected from the genera (i) nitro, (ii) cyano, (iii) halogen, and (iv) unsubstituted alkyl.

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