Pyridone compounds and agricultural and horticultural fungicides containing said compounds as active ingredient

A compound represented by Formula (1), or a salt thereof:

• wherein R1 represents a hydroxy group,
• a cyano group,
• a C1-C6 alkyl group optionally substituted with substituent A,
• a C1-C6 haloalkyl group,
• a C3-C8 cycloalkyl group optionally substituted with substituent A,
• a C2-C6 alkenyl group optionally substituted with substituent A,
• a C2-C6 haloalkenyl group,
• a C2-C6 alkynyl group optionally substituted with substituent A,
• a C2-C6 haloalkynyl group,
• a C1-C6 alkoxy group optionally substituted with substituent A,
• a C1-C6 haloalkoxy group,
• a C3-C8 cycloalkoxy group optionally substituted with substituent A,
• a C2-C6 alkenyloxy group optionally substituted with substituent A,
• a C2-C6 haloalkenyloxy group,
• a C3-C6 alkynyloxy group optionally substituted with substituent A,
• a C3-C6 haloalkynyloxy group, or
• an R10R11N— (wherein R10 and R11 each independently represents a hydrogen atom or a C1-C6 alkyl group);
• R2 represents a halogen atom,
• a hydroxy group,
• a cyano group,
• a nitro group,
• a C1-C6 alkyl group optionally substituted with substituent B,
• a C1-C6 haloalkyl group,
• a C3-C8 cycloalkyl group optionally substituted with substituent B,
• a C2-C6 alkenyl group optionally substituted with substituent B,
• a C2-C6 haloalkenyl group,
• a C2-C6 alkynyl group optionally substituted with substituent B,
• a C2-C6 haloalkynyl group,
• a C1-C6 alkoxy group optionally substituted with substituent B,
• a C1-C6 haloalkoxy group,
• a C3-C8 cycloalkoxy group optionally substituted with substituent B,
• a C2-C6 alkenyloxy group optionally substituted with substituent B,
• a C2-C6 haloalkenyloxy group,
• a C3-C6 alkynyloxy group optionally substituted with substituent B,
• a C3-C6 haloalkynyloxy group,
• an R20C(═O)— (wherein R20 represents a C1-C6 alkyl group, a C1-C6 haloalkyl group, a C3-C8 cycloalkyl group, a C1-C6 alkoxy group, a C1-C6 haloalkoxy group, a C3-C8 cycloalkoxy group or an R21R22N— (wherein R21 and R22 each independently represents a hydrogen atom, a C1-C6 alkyl group optionally substituted with substituent B1, a C1-C6 haloalkyl group or a C3-C8 cycloalkyl group, or R21 and R22 in combination with the nitrogen atom to which they are bonded form an aziridinyl group, an azetidinyl group, a pyrrolidinyl group, a piperidinyl group, a homopiperidinyl group or an azocanyl group)),
• an R20C(═O)O— (wherein R20 is the same as defined hereinabove),
• a 3 to 6-membered ring group containing 1 to 2 oxygen atoms,
• an R23-L2- (wherein R23 represents a C1-C6 alkyl group or a C1-C6 haloalkyl group, and L2 is S, SO or SO2),
• an R21R22N— (wherein R21 and R22 are the same as defined hereinabove), or
• an R24C(═O)N(R25)- (wherein R24 represents a hydrogen atom, a C1-C6 alkyl group, a C1-C6 haloalkyl group, a C3-C8 cycloalkyl group, a C1-C6 alkoxy group, a C1-C6 haloalkoxy group, a C3-C8 cycloalkoxy group or an R21R22N— (wherein R21 and R22 are the same as defined hereinabove), and R25 represents a hydrogen atom, a C1-C6 alkyl group optionally substituted with substituent B1, a C1-C6 haloalkyl group or a C3-C8 cycloalkyl group);
• R3 represents a hydrogen atom,
• a halogen atom,
• a nitro group,
• a C1-C6 alkyl group optionally substituted with substituent C,
• a C1-C6 haloalkyl group,
• a C3-C8 cycloalkyl group optionally substituted with substituent C,
• a C1-C6 alkoxy group optionally substituted with substituent C,
• a C1-C6 haloalkoxy group,
• a C2-C6 alkenyl group optionally substituted with substituent C,
• a C2-C6 haloalkenyl group,
• a C2-C6 alkynyl group optionally substituted with substituent C,
• a C2-C6 haloalkynyl group,
• an R30-L3- (wherein R30 has the same definition as R23, and L3 has the same definition as L2),
• an R31R32N— (wherein R31 and R32 have the same definition as R21 and R22), or
• an R33C(═O)— (wherein R33 represents a C1-C6 alkyl group, a C1-C6 haloalkyl group or a C3-C8 cycloalkyl group);
• n represents an integer of 0 to 5 (with the proviso that when n is 2 or greater, the two or more R2's represent independent substituents);
• X represents an oxygen atom or a sulfur atom;
• Y represents a phenyl group, a pyridyl group, a pyridazinyl group, a pyrimidinyl group, a pyrazinyl group, a triazinyl group, a tetrazinyl group, a thienyl group, a thiazolyl group, an isothiazolyl group or a thiadiazolyl group,
• the phenyl group is substituted with substituent D at an ortho position and is further substituted with 0 to 4 independent substituents D1 appropriately,
• the pyridyl group, the pyrazinyl group, the pyrimidinyl group, the pyridazinyl group, the triazinyl group or the tetrazinyl group is substituted with substituent D at an ortho position and is further substituted with 0 to 3 independent substituents D1 appropriately,
• the thienyl group, the thiazolyl group, the isothiazolyl group or the thiadiazolyl group is substituted with substituent D at an ortho position and is further substituted with 0 to 2 independent substituents D1 appropriately;
• the bond with a broken line indicates a double bond or a single bond,
• the substituent A is at least one selected from the group consisting of:
• a hydroxy group, a cyano group, a C3-C8 cycloalkyl group, a C1-C6 alkoxy group, a C1-C6 haloalkoxy group, a C3-C8 cycloalkoxy group, an R12R13N— (wherein R12 and R13 each independently represents a hydrogen atom, a C1-C6 alkyl group, a C1-C6 haloalkyl group or a C3-C8 cycloalkyl group, or R12 and R13 in combination with the nitrogen atom to which they are bonded form an aziridinyl group, an azetidinyl group, a pyrrolidinyl group, a piperidinyl group, a homopiperidinyl group or an azocanyl group), and an R14-L1- (wherein R14 represents a C1-C6 alkyl group or a C1-C6 haloalkyl group, and L1 represents S, SO or SO2);
• the substituent B is at least one selected from the group consisting of:
• a hydroxy group, a cyano group, a C3-C8 cycloalkyl group, a C1-C6 alkoxy group, a C1-C6 haloalkoxy group, a C3-C8 cycloalkoxy group, a C2-C6 alkoxyalkoxy group, an R21R22N— (wherein R21 and R22 are the same as defined hereinabove), an R23-L2- (wherein R23 and L2 are the same as defined hereinabove), an R26R27R28Si— (wherein R26, R27 and R28 each independently represents a C1-C6 alkyl group), an R26R27R28Si—(CH2)s-O— (wherein s represents an integer of 1 to 3, and R26, R27 and R28 are the same as defined hereinabove), an R20C(═O)— (wherein R20 is the same as defined hereinabove) and a 3 to 6-membered ring group containing 1 to 2 oxygen atoms;
• the substituent B1 is at least one selected from the group consisting of:
• a cyano group, a C1-C6 alkoxy group, a C1-C6 haloalkoxy group and a C3-C8 cycloalkoxy group;
• the substituent C is at least one selected from the group consisting of:
• a hydroxy group, a cyano group, a C3-C8 cycloalkyl group, a C1-C6 alkoxy group, a C1-C6 haloalkoxy group, a C3-C8 cycloalkoxy group, an R31R32N— (wherein R31 and R32 have the same definition as R21 and R22) and an R30-L3- (wherein R30 has the same definition as R14, and L3 has the same definition as L1);
• the substituent D is at least one selected from the group consisting of:
• a halogen atom, a C1-C6 alkyl group, a C1-C6 haloalkyl group, a C1-C6 alkoxy group and a C1-C6 haloalkoxy group;
• and
• the substituent D1 is at least one selected from the group consisting of:
• a hydroxy group, a halogen atom, a C1-C6 alkyl group, a C1-C6 haloalkyl group, a C3-C8 cycloalkyl group, a C1-C6 alkoxy group, a C1-C6 haloalkoxy group and a C3-C8 cycloalkoxy group.