Herbicidal 4-benzoyl-1-methyl-5-hydroxypyrazoles
AssigneeNissan Chemical Industries, Ltd.
InventorsMasatoshi Baba, Norio Tanaka, Takasi Ikai, Tsutomu Nawamaki, Masaji Matsunaga
Life of this patent
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Abstract
Pyrazole derivatives, selective herbicidal compositions containing said derivatives and the use of said derivatives are provided. The pyrazole derivatives having selective herbicidal activity are represented by the formula I: ##STR1## wherein, X denotes a halogen, nitro or methanesulfonyl, Y denotes hydrogen, a lower alkyl or a halogen, Z denotes a halogen or methanesulfonyl, and R denotes hydrogen; an organic acid residue; a lower alkynyl; a lower alkyl or a lower alkenyl which may be substituted by a halogen, hydroxy, cyano or an alkoxycarbonyl; or a benzyl which may be substituted by a halogen, nitro or a lower alkyl.
Claims12
A compound of the formula:
- ##STR214## wherein, X denotes a halogen, nitro or methanesulfonyl,
- Y denotes hydrogen, a lower alkyl or a halogen,
- Z denotes methanesulfonyl, and
- R denotes hydrogen;
- an organic acid residue selected from the group consisting of methanesulfonyl, p-toluenesulfonyl, benzoyl, tert-butoxycarbonyl, acetyl, cyclohexylcarbonyl, cinnamoyl, acryloyl, phenoxyacetyl, ethoxycarbonyl, N,N-dimethylcarbamoyl, N,N-dimethylsulfamoyl, benzenesulfonyl, trifluoromethanesulfonyl, diethylphosphoryl and diethylthiophosphoryl;
- a lower alkynyl;
- a lower alkyl or a lower alkenyl which may be substituted by a halogen, hydroxy, cyano or an alkoxycarbonyl;
- or a benzyl which may be substituted by a halogen, nitro or a lower alkyl.
A compound of the formula:
- ##STR215## wherein, X denotes a halogen, and R denotes hydrogen;
- an organic acid residue;
- a lower alkyl;
- a lower alkenyl;
- a lower alkynyl;
- a lower alkyl or lower alkenyl each substituted by a halogen, hydroxy, cyano or alkoxycarbonyl;
- or a benzyl which may be substituted by a halogen, nitro or a lower alkyl.
A compound of the formula:
- ##STR216## wherein, R denotes hydrogen, methanesulfonyl or p-toluenesulfonyl.
A selective herbicidal composition containing as an active ingredient an effective amount of one or more of the compounds of the formula:
- ##STR224## wherein, X denotes a halogen, and R denotes hydrogen;
- an organic acid residue;
- a lower alkynyl;
- a lower alkyl or lower alkenyl which may be substituted by a halogen, hydroxy, cyano or an alkoxycarbonyl;
- or a benzyl which may be substituted by a halogen, nitro or a lower alkyl, together with an inert carrier therefor.
Dependencies are inferred from the claim text.