Pyridone derivative and herbicide
View Patent ↗A pyridone derivative represented by Formula [1] or an agriculturally acceptable salt thereof: wherein R 1 is a C 1-6 alkyl group, a C 2-6 alkenyl group, a C 2-6 alkynyl group, or the like; R 2 and R 3 are each independently a hydrogen atom, a nitro group, a cyano group, or the like; and A is a group represented by Formula A-1, Formula A-2, Formula A-3, Formula A-4, or Formula A-5: The compounds represented by general formula [1] control various weeds growing in upland fields, orchards, paddy fields, and non-crop lands while showing high safety to useful plants and crops.
1. A pyridone derivative of Formula [1]:
wherein R 1 is:
a C 1-6 alkyl group,
a C 2-6 alkenyl group,
a C 2-6 alkynyl group,
a C 3-8 cycloalkyl group,
a C 3-8 cycloalkyl C 1-6 alkyl group,
a C 1-6 haloalkyl group,
a C 2-6 haloalkenyl group,
a C 2-6 haloalkynyl group,
a C 1-6 alkylamino C 1-6 alkyl group,
a di(C 1-6 alkyl)amino C 1-6 alkyl group,
a C 1-6 alkylthio C 1-6 alkyl group,
a C 1-6 alkylsulfinyl C 1-6 alkyl group,
a C 1-6 alkylsulfonyl C 1-6 alkyl group,
a C 3-8 cycloalkylthio C 1-6 alkyl group,
a C 3-8 cycloalkylsulfinyl C 1-6 alkyl group,
a C 3-8 cycloalkylsulfonyl C 1-6 alkyl group,
a C 3-8 cycloalkyl C 1-6 alkylthio C 1-6 alkyl group,
a C 3-8 cycloalkyl C 1-6 alkylsulfinyl C 1-6 alkyl group,
a C 3-8 cycloalkyl C 1-6 alkylsulfonyl C 1-6 alkyl group,
a C 2-6 alkenylthio C 1-6 alkyl group,
a C 2-6 alkenylsulfinyl C 1-6 alkyl group,
a C 2-6 alkenylsulfonyl C 1-6 alkyl group,
a C 2-6 alkynylthio C 1-6 alkyl group,
a C 2-6 alkynylsulfinyl C 1-6 alkyl group,
a C 2-6 alkynylsulfonyl C 1-6 alkyl group,
a C 1-6 haloalkylthio C 1-6 alkyl group,
a C 1-6 haloalkylsulfinyl C 1-6 alkyl group,
a C 1-6 haloalkylsulfonyl C 1-6 alkyl group,
a C 1-6 alkoxy C 1-6 alkyl group,
a C 1-6 alkoxy C 1-6 alkoxy C 1-6 alkyl group,
a C 3-8 cycloalkyloxy C 1-6 alkyl group,
a benzyloxy C 1-6 alkyl group which may be substituted with one or more substituents selected from Substituent Group α,
a cyano C 1-6 alkyl group,
a C 1-6 haloalkoxy C 1-6 alkyl group,
a phenyl group which may be substituted with one or more substituents selected from Substituent Group α,
a benzyl group which may be substituted with one or more substituents selected from Substituent Group α,
a phenyl C 1-6 alkyl group which may be substituted with one or more substituents selected from Substituent Group α,
a phenyl C 2-6 alkenyl group which may be substituted with one or more substituents selected from Substituent Group α,
a phenyl C 2-6 alkynyl group which may be substituted with one or more substituents selected from Substituent Group α,
a C 1-6 alkoxyimino C 1-6 alkyl group,
a phenoxyimino C 1-6 alkyl group which may be substituted with one or more substituents selected from Substituent Group α,
a di(C 1-6 alkoxy)C 1-6 alkyl group,
a formyl C 1-6 alkyl group,
a C 2-6 alkylideneamino group,
a di(C 1-10 alkyl)amino C 1-6 alkylideneamino group,
a NR 31 R 32 group,
a C 1-6 alkoxy group,
a C 2-6 alkenyloxy group,
a C 2-6 alkynyloxy group,
a C 3-8 cycloalkyloxy group,
a C 3-8 cycloalkyl C 1-3 alkyloxy group,
a C 1-6 haloalkoxy group,
a C 2-10 heterocyclic group having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom (wherein the heterocyclic group is optionally substituted with 1 to 5 halogen atoms, oxo groups, C 1-6 alkyl groups, C 1-6 haloalkyl groups, C 1-6 alkoxy groups, C 1-6 haloalkoxy groups or cyano group),
a C 1-6 alkyl group substituted with a C 2-10 heterocyclic ring having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom and wherein the C 2-10 heterocyclic ring, substituted on the C 1-6 alkyl group, is optionally substituted with 1 to 5 halogen atoms, oxo groups, C 1-6 alkyl groups, C 1-6 haloalkyl groups, C 1-6 alkoxy groups, C 1-6 haloalkoxy groups or cyano groups
a C 1-6 alkylamino group substituted with a C 2-10 heterocyclic ring having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom and wherein the C 2-10 heterocyclic ring, substituted on the C 1-6 alkylamino group, is optionally substituted with 1 to 5 halogen atoms, oxo groups, C 1-6 alkyl groups, C 1-6 haloalkyl groups, C 1-6 alkoxy groups, C 1-6 haloalkoxy groups or cyano groups), or
a C 1-6 alkoxy C 1-6 alkyl group substituted with a C 2-10 heterocyclic ring having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom and wherein the C 2-10 heterocyclic ring, substituted on the C 1-6 alkoxy C 1-6 alkyl group, is optionally substituted with 1 to 5 halogen atoms, oxo groups, C 1-6 alkyl groups, C 1-6 haloalkyl groups, C 1-6 alkoxy groups, C 1-6 haloalkoxy groups or cyano groups;
wherein R 2 and R 3 are each independently:
a hydrogen atom,
a nitro group,
a cyano group,
a C 1-6 alkyl group,
a C 2-6 alkenyl group,
a C 2-6 alkynyl group,
a C 3-8 cycloalkyl group,
a C 1-6 haloalkyl group,
a C 2-6 haloalkenyl group,
a C 2-6 haloalkynyl group,
a C 1-6 alkoxy group,
a C 1-6 haloalkoxy group,
a C 1-6 alkylthio group,
a C 1-6 alkylsulfinyl group,
a C 1-6 alkylsulfonyl group,
a C 1-6 alkylsulfonyl C 1-6 alkyl group,
a C 1-6 haloalkylthio group,
a C 1-6 haloalkylsulfinyl group,
a C 1-6 haloalkylsulfonyl group,
a C 1-6 alkoxy C 1-6 alkyl group,
a C 3-8 cycloalkyloxy C 1-4 alkyl group,
a di(C 1-6 alkoxy) C 1-6 alkyl group,
a phenyl group which may be substituted with one or more substituents selected from Substituent Group α,
a benzyl group which may be substituted with one or more substituents selected from Substituent Group α,
a phenyl C 1-6 alkyl group which may be substituted with one or more substituents selected from Substituent Group α,
a phenyl C 2-6 alkenyl group which may be substituted with one or more substituents selected from Substituent Group α,
a phenyl C 2-6 alkynyl group which may be substituted with one or more substituents selected from Substituent Group α, or
a halogen atom; and
wherein A is selected from the group consisting of Formula A-1, Formula A-2, Formula A-3, Formula A-4, and Formula A-5:
wherein R 4 is:
a hydroxyl group,
O − M + (where M + represents an alkali metal cation or an ammonium cation),
a halogen atom,
a cyano group,
an isothiocyanate group,
an isocyanate group,
a hydroxycarbonyloxy group,
a C 1-6 alkoxycarbonyloxy group,
a benzyloxy carbonyloxy group which may be substituted with one or more substituents selected from Substituent Group α,
a C 1-12 alkoxy group,
a C 2-6 alkenyloxy group,
a C 2-6 alknyloxy group,
a C 3-6 cycloalkyloxy group,
a cyanomethyleneoxy group,
a C 3-8 cycloalkyl C 1-3 alkyloxy group,
a C 1-8 alkylcarbonyloxy group,
a C 1-6 haloalkylcarbonyloxy group,
a C 2-6 alkenylcarbonyloxy group,
a C 2-6 haloalkenylcarbonyloxy group,
a C 2-6 alkynylcarbonyloxy group,
a C 2-6 haloalkynylcarbonyloxy group,
a C 1-6 alkoxycarbonyl C 1-6 alkoxy group,
a phenyloxy group which may be substituted with one or more substituents selected from Substituent Group α,
a benzyloxy group which may be substituted with one or more substituents selected from Substituent Group α,
a phenylcarbonyloxy group which may be substituted with one or more substituents selected from Substituent Group α,
a benzylcarbonyloxy group which may be substituted with one or more substituents selected from Substituent Group α,
a phenylcarbonyl C 1-6 alkyloxy group which may be substituted with one or more substituents selected from Substituent Group α,
a C 1-3 alkylsulfonyloxy group,
a phenylsulfonyloxy group which may be substituted with one or more substituents selected from Substituent Group α,
a benzylsulfonyloxy group which may be substituted with one or more substituents selected from Substituent Group α,
a C 1-10 alkylthio group, a C 1-10 alkylsulfinyl group,
a C 1-10 alkylsulfonyl group, a phenylthio group which may be substituted with one or more substituents selected from Substituent Group α,
a benzylthio group which may be substituted with one or more substituents selected from Substituent Group α,
a phenylsulfinyl group which may be substituted with one or more substituents selected from Substituent Group α,
a benzylsulfinyl group which may be substituted with one or more substituents selected from Substituent Group α,
a phenylsulfonyl group which may be substituted with one or more substituents selected from Substituent Group α,
a benzylsulfonyl group which may be substituted with one or more substituents selected from Substituent Group α,
a C 1-10 alkylamino group,
a di(C 1-10 alkyl)amino group,
a C 1-6 alkoxycarbonylamino group,
a C 1-6 alkyloxy group substituted with a C 2-10 heterocyclic ring having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom, and wherein the C 2-10 heterocyclic ring, substituted on the C 1-6 alkyloxy group, is optionally substituted with 1 to 5 halogen atoms, oxo groups, C 1-6 alkyl groups, C 1-6 haloalkyl groups, C 1-6 alkoxy groups or cyano groups, or
a C 2-10 heterocyclic group having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom, wherein the C 2-10 heterocyclic group is optionally substituted with 1 to 5 halogen atoms, oxo groups, C 1-6 alkyl groups, C 1-8 haloalkyl groups, C 1-6 alkoxy groups or cyano group);
wherein A 0 is selected from the group consisting of Formula X 10 and Formula X 11 :
wherein A 1 is selected from the group consisting of Formula X 1 and Formula X 2 :
wherein A 2 is selected from the group consisting of Formula X 3 , Formula X 4 , Formula X 5 , Formula X 6 , and Formula X 7 :
wherein A 3 is selected from the group consisting of Formula X 8 and Formula X 9 :
wherein:
n is 0, 1 or 2;
R 5 , R 6 , R 8 , R 9 , R 11 and R 12 are each independently a hydrogen atom or a C 1-6 alkyl group,
R 5 and R 8 may form a ring by bonding with a C 1-5 alkylene chain or a C 2-5 alkenylene chain, or R 5 and R 11 may form a ring by bonding with a C 2-5 alkylene chain or a C 2-5 alkenylene chain;
R 7 , R 33 , and R 34 are each independently a hydrogen atom, a C 1-6 alkyl group, a C 1-6 haloalkyl group, a C 2-6 alkenyl group, a C 2-6 alkynyl group or a C 1-6 alkoxy group;
R 14 , R 15 , R 16 , and R 17 are each independently a hydrogen atom, a C 1-6 alkyl group, a C 1-6 alkoxy group or a benzyl group which may be substituted with one or more substituents selected from Substituent Group α;
R 18 is a hydrogen atom, a C 1-6 alkyl group, a C 2-6 alkenyl group, a C 2-6 alkynyl group, a cyanomethyl group or a benzyl group which may be substituted with one or more substituents selected from Substituent Group α;
R 20 is a C 1-6 alkyl group, a C 2-6 alkenyl group, a C 2-6 alkynyl group, a C 3-8 cycloalkyl group or a C 3-5 cycloalkyl C 1-6 alkyl group;
R 21 is a hydrogen atom, a C 1-6 alkyl group or a halogen atom;
R 23 is:
a C 1-6 alkyl group,
a C 1-6 haloalkyl group,
a C 3-8 cycloalkyl group,
a C 1-10 alkylthio group,
a C 1-10 alkylsulfinyl group,
a C 1-10 alkylsulfonyl group,
a phenylthio group which may be substituted with one or more substituents selected from Substituent Group α,
a benzylthio group which may be substituted with one or more substituents selected from Substituent Group α,
a phenylsulfinyl group which may be substituted with one or more substituents selected from Substituent Group α,
a benzylsulfinyl group which may be substituted with one or more substituents selected from Substituent Group α,
a phenylsulfonyl group which may be substituted with one or more substituents selected from Substituent Group α, or
a benzylsulfonyl group which may be substituted with one or more substituents selected from Substituent Group α;
R 24 is a hydrogen atom, a halogen atom, a cyano group, a C 1-6 alkyl group, a C 3-8 cycloalkyl group, or a C 1-6 alkoxycarbonylamino group; and
R 25 is a C 1-6 alkoxycarbonyl group, a cyano group or a nitro group, and
R 31 and R 32 are each independently:
a hydrogen atom,
a C 1-6 alkyl group, a phenyl group which may be substituted with one or more substituents selected from Substituent Group α,
a benzyl group which may be substituted with one or more substituents selected from Substituent Group α,
a C 1-6 alkoxy C 1-6 alkyl group,
a C 1-6 alkylcarbonyl group,
a C 1-6 alkoxycarbonyl group,
a benzyloxycarbonyl group which may be substituted with one or more
substituents selected from Substituent Group α,
a C 1-6 haloalkyl group,
a C 3-8 cycloalkyl group,
a C 3-8 cycloalkyl C 1-6 alkyl group,
a C 1-6 alkylsulfonyl group,
a phenylsulfonyl group which may be substituted with one or more substituents selected from Substituent Group α,
a benzylsulfonyl group which may be substituted with one or more substituents selected from Substituent Group α,
a C 2-10 heterocyclic group having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom and wherein the C 2-10 heterocyclic group of R 31 and R 32 may be substituted with 1 to 5 halogen atoms, oxo groups, C 1-6 alkyl groups, C 1-6 haloalkyl groups, C 1-6 alkoxy groups or cyano groups, or
a C 1-6 alkyl group substituted with a C 2-10 heterocyclic ring having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom and wherein the C 2-10 heterocyclic ring of the C 1-6 alkyl group may be substituted with 1 to 5 halogen atoms, oxo groups, alkyl groups, C 1-6 haloalkyl groups, C 1-6 alkoxy groups or cyano groups, and
wherein Substituent Group α is a halogen atom, a C 1-6 alkyl group, a C 1-6 haloalkyl group, a C 1-6 alkoxy group, a C 1-6 haloalkoxy group, a C 1-4 alkylenedioxy group, a nitro group, a cyano group, a C 1-6 alkylthio group, a C 1-6 alkylsulfinyl group, a C 1-6 alkylsulfonyl group, a C 1-6 alkoxy C 1-6 alkyl group and a C 1-6 haloalkylsulfonylamino group, or an agriculturally acceptable salt thereof.
2. The pyridone derivative or an agriculturally acceptable salt thereof according to claim 1 ,
wherein,
A is selected from the group consisting of Formula A-1, Formula A-2, Formula A-3, Formula A-4 and Formula A-5; and
A 0 in A-1 is selected from the group consisting of Formula X 10 , Formula X 11 -a and Formula X 11 -b:
where A 2 is selected from the group consisting of Formula X 3 , Formula X 4 , Formula X 5 , Formula X 6 , and Formula X 7 :
A 3 is selected from the group consisting of Formula X 8 and Formula X 9 :
n is 0, 1 or 2;
R 5 , R 6 , R 8 , R 9 , R 11 and R 12 are each independently a hydrogen atom or a C 1-6 alkyl group;
R 7 , R 33 , and R 34 are each independently a hydrogen atom, a C 1-6 alkyl group, a C 1-6 haloalkyl group, a C 2-6 alkenyl group, a C 2-6 alkynyl group or a C 1-6 alkoxy group; and
T is a C 2-5 alkylene chain or a C 2-5 alkenylene chain.
3. The pyridone derivative or an agriculturally acceptable salt thereof according to claim 1 ,
wherein, R 1 is:
a C 3-8 cycloalkyl C 1-6 alkyl group,
a C 2-6 haloalkenyl group,
a C 2-6 haloalkynyl group,
a C 1-6 alkylamino C 1-6 alkyl group,
a di(C 1-6 alkyl)amino C 1-6 alkyl group,
a C 1-6 alkylthio C 1-6 alkyl group,
a C 1-6 alkylsulfinyl C 1-6 alkyl group,
a C 1-6 alkylsulfonyl C 1-6 alkyl group,
a C 3-8 cycloalkylthio C 1-6 alkyl group,
a C 3-8 cycloalkylsulfinyl C 1-6 alkyl group,
a C 3-8 cycloalkylsunfonyl C 1-6 alkyl group,
a C 3-8 cycloalkyl C 1-6 alkylthio C 1-6 alkyl group,
a C 3-8 cycloalkyl C 1-6 alkylsulfinyl C 1-6 alkyl group,
a C 3-6 cycloalkyl C 1-6 alkylsulfonyl C 1-6 alkyl group,
a C 2-6 alkenylthio C 1-6 alkyl group,
a C 2-6 alkenylsulfinyl C 1-6 alkyl group,
a C 2-6 alkenylsulfonyl C 1-6 alkyl group,
a C 2-6 alkynylthio C 1-6 alkyl group,
a C 2-6 alkynylsulfinyl C 1-6 alkyl group,
a C 2-6 alkynylsulfonyl C 1-6 alkyl group,
a C 1-6 haloalkylthio C 1-6 alkyl group,
a C 1-6 haloalkylsulfinyl C 1-6 alkyl group,
a C 1-6 haloalkylsulfonyl C 1-6 alkyl group,
a C 1-6 alkoxy C 1-6 alkyl group,
a C 1-6 alkoxy C 1-6 alkoxy C 1-6 alkyl group,
a C 3-8 cycloalkyloxy C 1-6 alkyl group,
a benzyloxy C 1-6 alkyl group which may be substituted with one or more substituents selected from Substituent Group α,
a cyano C 1-6 alkyl group,
a C 1-6 haloalkoxy C 1-6 alkyl group,
a phenyl group which is substituted with one or more substituents selected from Substituent Group α′,
a benzyl group which is optionally substituted with one or more substituents selected from the Substituent Group α,
a phenyl C 1-6 alkyl group which may be substituted with one or more substituents selected from the Substituent Group α,
a phenyl C 2-6 alkenyl group which may be substituted with one or more substituents selected from the Substituent Group α,
a phenyl C 2-6 alkynyl group which may be substituted with one or more substituents selected from the Substituent Group α,
a C 1-6 alkoxyimino C 1-6 alkyl group, a phenoxyimino C 1-6 alkyl group which may be substituted with one or more substituents selected from the Substituent Group α,
a di(C 1-6 alkoxy)C 1-6 alkyl group, a formyl C 1-6 alkyl group,
a C 2-6 alkylideneamino group,
a di(C 1-10 alkyl)amino C 1-6 alkylideneamino group,
a NR 31 R 32 group, a C 2-6 alkenyloxy group,
a C 2-6 alkynyloxy group,
a C 3-8 cycloalkyloxy group,
a C 3-8 cycloalkyl C 1-3 alkyloxy group,
a C 2-10 heterocyclic group having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom and wherein the C 2-10 heterocyclic group is substituted with one or more substituents selected from the group consisting of a halogen atom, an oxo group, a C 1-6 alkyl group, a C 1-6 haloalkyl group, a C 1-6 alkoxy group, a C 1-6 haloalkoxy group and a cyano group),
a C 1-6 alkyl group substituted with a C 2-10 heterocyclic ring having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom and wherein the C 2-10 heterocyclic ring of the C 1-6 alkyl group is optionally substituted with 1 to 5 halogen atoms, oxo groups, C 1-6 alkyl groups, C 1-6 haloalkyl groups, C 1-6 alkoxy groups, C 1-6 haloalkoxy groups or cyano groups),
a C 1-6 alkylamino group substituted with a C 2-10 heterocyclic ring having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom and (wherein the heterocyclic ring of the group is optionally substituted with 1 to 5 halogen atoms, oxo groups, C 1-6 alkyl groups, C 1-6 haloalkyl groups, C 1-6 alkoxy groups, C 1-6 haloalkoxy groups or cyano groups, or
a C 1-6 alkoxy C 1-6 alkyl group substituted with a C 2-10 heterocyclic ring having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom and wherein the heterocyclic ring of the C 1-6 alkylamino group is optionally substituted with 1 to 5 halogen atoms, oxo groups, C 1-6 alkyl groups, C 1-6 haloalkyl groups, C 1-6 alkoxy groups, C 1-6 haloalkoxy groups or cyano groups,
wherein R 31 is:
a hydrogen atom,
a C 1-6 alkyl group,
a phenyl group which may be substituted with one or more substituents selected from the Substituent Group α,
a benzyl group which may be substituted with one or more substituents selected from the Substituent Group α,
a C 1-6 alkoxy C 1-6 alkyl group,
a C 1-6 alkoxycarbonyl group,
a benzyloxycarbonyl group which may be substituted with one or more substituents selected from Substituent Group α,
a C 1-6 haloalkyl group,
a C 3-8 a cycloalkyl group,
a C 3-8 cycloalkyl C 1-6 alkyl group,
a C 1-6 alkylsulfonyl group, a phenylsulfonyl group which may be substituted with one or more substituents selected from the Substituent Group α,
a benzylsulfonyl group which may be substituted with one or more substituents selected from the Substituent Group α,
a C 2-10 heterocyclic group having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom and wherein the heterocyclic group may be substituted with 1 to 5 halogen atoms, oxo groups, C 1-6 alkyl groups, C 1-6 haloalkyl groups, C 1-6 alkoxy groups or cyano groups, or
a C 1-6 alkyl group substituted with a C 2-10 heterocyclic ring having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom and wherein the heterocyclic ring of the C 1-6 alkyl group is optionally substituted with 1 to 5 halogen atoms, oxo groups, C 1-6 alkyl groups, C 1-6 haloalkyl groups, C 1-6 alkoxy groups or cyano groups); and
wherein R 32 is:
a phenyl group which may be substituted with one or more substituents selected from the Substituent Group α,
a benzyl group which may be substituted with one or more substituents selected from the Substituent Group α,
a C 1-6 alkoxy C 1-6 alkyl group,
a C 1-6 alkoxycarbonyl group, a benzyloxycarbonyl group which may be substituted with one or more substituents selected from Substituent Group α,
a C 1-6 haloalkyl group,
a C 3-8 cycloalkyl group,
a C 3-8 cycloalkyl C 1-6 alkyl group,
a C 1-6 alkylsulfonyl group, a phenylsulfonyl group which may be substituted with one or more substituents selected from the Substituent Group α,
a benzylsulfonyl group which may be substituted with one or more substituents selected from the Substituent Group α,
a C 2-10 heterocyclic group having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom and wherein the C 2-10 heterocyclic group is optionally substituted with 1 to 5 halogen atoms, oxo groups, C 1-6 alkyl groups, C 1-6 haloalkyl groups, C 1-6 alkoxy groups or cyano groups), or
a C 1-6 alkyl group substituted with a C 2-10 heterocyclic ring having one or more of the same or different hetero atoms selected from the group consisting of an oxygen atom, a sulfur atom and a nitrogen atom and wherein the heterocyclic ring of the C 1-6 alkyl group is optionally substituted with 1 to 5 halogen atoms, oxo groups, C 1-6 alkyl groups, C 1-6 haloalkyl groups, C 1-6 alkoxy groups or cyano groups, and
wherein Substituent Group α′ is a C 1-6 haloalkyl group, a C 1-6 haloalkoxy group, a methylenedioxy group, a nitro group, a cyano group, a C 1-6 alkylthio group, a C 1-6 alkylsulfinyl group, a C 1-6 alkylsulfonyl group, a C 1-6 alkoxy C 1-6 alkyl group or a C 1-6 haloalkylsulfonylamino group.
4. A herbicide containing the pyridone derivative or an agriculturally acceptable salt thereof according to claim 3 , as the active ingredient.
5. A herbicide containing the pyridone derivative or an agriculturally acceptable salt thereof according to claim 1 , as the active ingredient.
6. A herbicide containing the pyridone derivative or an agriculturally acceptable salt thereof according to claim 2 , as the active ingredient.