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Pyridine derivatives and their herbicidal compositions

  • US 4,696,694 A
  • Filed: 07/07/1986
  • Issued: 09/29/1987
  • Est. Priority Date: 07/25/1985
  • Status: Expired due to Fees
First Claim
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1. A pyridine derivative having the formula:

  • ##STR234## wherein one of A, B, D and E is an oxygen atom, a sulfur atom, --SO--, --SO2 -- or --NR3 --, with the rest being all carbon atoms, one double bond may or may not be present in the ring;

    X is a halogen atom, a C1 -C4 alkyl group, a C1 -C4 alkoxy group, a C1 -C4 haloalkyl group, a C1 -C4 haloalkoxy group, a C1 -C4 alkylthio group, a C1 -C4 haloalkylthio group, a C1 -C4 alkoxycarbonyl group, a C1 -C4 alkylthioalkyl group, a tetrahydrothiopyranyl group, a hydroxyl group, a CF3 group or a phenyl or pyridyl group (which may be substituted by C1 -C4 alkyl, C1 -C4 alkoxy, C1 -C4 alkylthio, CF3, nitro or halogen);

    n is an integer of from 0 to 6, and when n is an integer of from 2 to 6, the plurality of X may be the same or different;

    W is an oxygen atom or a sulfur atom;

    R is a hydrogen atom, a di-lower alkylimino group, a C1 -C5 alkyl group (which may be substituted by C1 -C3 alkoxy, hydroxyl, C3 -C6 halocycloalkyl carboxyl, lower alkoxycarbonyl, cyano, dialkylphosphonyl, halogen, benzyloxy, tri-lower alkylammonium or phenyl which may be substituted by halogen, C1 -C4 alkyl, C1 -C4 alkoxy or nitro), a C2 -C5 alkenyl group (which may be substituted by C1 -C3 alkoxy, lower alkoxycarbonyl, two C1 -C3 alkoxy or phenyl), a C2 -C5 alkynyl group, a C4 or C5 oxacycloalkyl group, a C2 -C5 mono-, di- or tri-haloalkenyl group, a C2 -C5 haloalkynyl group, a glycidyl group, a furfuryl group, an alkylthioalkyl group, a C3 -C6 cycloalkyl group which may be substituted by C1 -C3 alkyl, or a cation selected from the group consisting of an alkali metal ion, an alkaline earth metal ion, an ammonium ion or a quaternary ammonium ion;

    R1 is a C1 -C4 alkyl group, R2 is a C1 -C4 alkyl group or a C3 -C6 cycloalkyl group, or R1 and R2 together with the adjacent carbon atom, form a C3 -C6 cycloalkyl group which may be substituted by C1 -C3 alkyl; and

    R3 is a hydrogen atom or a C1 -C3 alkyl group;

    or an optical isomer of the derivative when R1 and R2 are different from each other.

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