Abstract: A method for producing a compound of a formula (3), including reacting a compound of a formula (1) with a compound of a formula (2) by using a tertiary alcohol and a base: where R1, R2, R3, R4, R5, R6, R7, R8, and R9 are each independently a hydrogen atom, a halogen atom, a (C1-C4)alkyl, or a (C1-C4)alkoxy, the amount of the base used is 2.0-4.0 equivalents per 1 equivalent of the compound of formula (2), the amount of the tertiary alcohol used is 0.3-2.5 equivalents per 1 equivalent of the compound of formula (2), the base is a plurality of compounds comprising a lithium-containing base as a first compound, and a second compound selected from the group consisting of alkali metal hydrides, alkali metal amides, alkoxides, alkyl metals, alkali metals, and organic bases, and the reaction is performed in the presence of an aromatic hydrocarbon solvent.

Abstract: A method for producing a nitroso compound of the following formula (3), comprising reacting a compound of the following formula (1) with a compound of the following formula (2) by using a tertiary alcohol and a base. wherein R1, R2, R3, R4, R5, R6, R7, R8, and R9 are each independently a hydrogen atom, a halogen atom, a (C1-C4) alkyl, or a (C1-C4) alkoxy.

Abstract: A method for producing a nitroso compound of the following formula (3), comprising reacting a compound of the following formula (1) with a compound of the following formula (2) by using a tertiary alcohol and a base. wherein R1, R2, R3, R4, R5, R6, R7, R8, and R9 are each independently a hydrogen atom, a halogen atom, a (C1-C4) alkyl, or a (C1-C4) alkoxy.

Abstract: Provided are 2-pyridone derivatives which have excellent herbicidal activity and exhibit high safety to useful crops and so on; salts thereof; and herbicides containing same. In more detail, 2-pyridone derivatives represented by general formula [I] or agrochemically acceptable salts thereof, and herbicides containing these compounds are provided. In general formula [I], X1 is an oxygen atom or a sulfur atom; X2, X3, and X4 are to each CH or N(O)m; m is an integer of 0 or 1; R1 is a hydrogen atom, a C1-12 alkyl group, or the like; R2 is a halogen atom, a cyano group, or the like; n is an integer of 0 to 4; R3 is a hydroxyl group, a halogen atom, or the like; A1 is C(R11R12); A2 is C(R13R14) or C?O; A3 is C(R15R16); and R11, R12, R13, R14, R15, and R16 are each independently a hydrogen atom or a C1-6 alkyl group.

Abstract: A pyridone derivative represented by Formula [1] or an agriculturally acceptable salt thereof: wherein R1 is a C1-6 alkyl group, a C2-6 alkenyl group, a C2-6 alkynyl group, or the like; R2 and R3 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.

Abstract: Provided are 2-pyridone derivatives which have excellent herbicidal activity and exhibit high safety to useful crops and so on; salts thereof; and herbicides containing same. In more detail, 2-pyridone derivatives represented by general formula [I] or agrochemically acceptable salts thereof, and herbicides containing these compounds are provided. In general formula [I], X1 is an oxygen atom or a sulfur atom; X2, X3, and X4 are to each CH or N(O)m; m is an integer of 0 or 1; R1 is a hydrogen atom, a C1-12 alkyl group, or the like; R2 is a halogen atom, a cyano group, or the like; n is an integer of 0 to 4; R3 is a hydroxyl group, a halogen atom, or the like; A1 is C(R11R12); A2 is C(R13R14) or C?O; A3 is C(R15R16); and R11, R12, R13, R14, R15, and R16 are each independently a hydrogen atom or a C1-6 alkyl group.

Abstract: A pyridone derivative represented by Formula [1] or an agriculturally acceptable salt thereof: wherein R1 is a C1-6 alkyl group, a C2-6 alkenyl group, a C2-6 alkynyl group, or the like; R2 and R3 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.

Abstract: Pyrimidine derivatives having excellent herbicidal activities for crop plants and selectivity between crop plants and weeds, are presented. Pyrimidine derivatives represented by the following formula (I): wherein R1 is a hydrogen atom, an alkyl group, a haloalkyl group or the like; R2 is an alkyl group, a phenyl group which may be substituted, or the like; R3 is a hydrogen atom, an alkyl group, an alkynyl group or the like; R7 is a hydrogen atom, a halogen atom, an alkyl group or the like; R8 is a hydrogen atom, an alkyl group or the like, W is a —C(═Q) Z— group or a —SO2— group; Q is O or S; Z is O, S, a —C(R4)R5—, a —NR6 group or the like; each of R4 and R5 is a hydrogen atom, an alkyl group, an alkoxy group or the like; R6 is a hydrogen atom or an alkyl group; and Ar is a phenyl group which may be substituted, a pyridyl group which may be substituted, or the like, and herbicides containing such pyrimidine derivatives as active ingredients.

Abstract: The present invention lies in a process for producing a compound represented by the following formula [IV], which comprises the following steps (1) to (3), as well as in an intermediate therefor.

Abstract: 3-Pyrimidinyloxy-substituted picolinic acid derivatives of the formula ##STR1## and their salts are useful as herbicides against annual and perennial gramineous and broadleaf weeds while exhibiting low phytotoxicity to desired crop plants.

Abstract: The present invention is to provide a novel picolinic acid derivative having the formula, ##STR1## (wherein R is a hydrogen atom, an alkyl group or others, R.sup.1 and R.sup.2 are the same or different, and are an alkyl group, an alkoxy group or others, X is a cyano group, a phenoxy group or others, Y is an oxygen atom or others, and n is 0 or 1) or a salt thereof; a method for preparing the same; and a herbicidal composition containing the same as an active ingredient.The picolinic acid derivative or the salt thereof of the present invention achieves an excellent herbicidal effect at a low dosage, and is effective for controlling the growth of various weeds in a wide range.The picolinic acid derivative or the salt thereof of the present invention can be applied to a paddy field, a cultivated field, a non-agricultural land and the like as a herbicidal composition.

Abstract: Compounds of the formula ##STR1## as intermediates for the preparation of pyrimidine or triazine herbicides.

Abstract: A pyrimidine or triazine derivative and its salt, said pyrimidine or triazine derivative having the formula: ##STR1## wherein R represents a group of the formula OR.sup.3 {wherein R.sup.3 represents a hydrogen atom, an alkyl group, etc.}, a group of the formula SR.sup.6 {wherein R.sup.6 represents a hydrogen atom, an alkyl group, etc.}, a group of the formula ##STR2## {wherein R.sup.7 and R.sup.8 represent a hydrogen atom, an alkyl group, etc.}, or an imidazolyl group:R.sup.1 represents a hydrogen atom, an alkyl group, etc.;R.sup.2 represents a hydroxyl group, an alkyl group, etc.;A and B represent an alkyl group, etc.;Y represents an oxygen atom, etc.; andZ represents a methine group or a nitrogen atom.

Abstract: A pyrimidine or triazine derivative and its salt, said pyrimidine or triazine derivative having the formula: ##STR1## wherein R represents a group of the formula OR.sub.3 {wherein R.sup.3 represents a hydrogen atom, an alkyl gorup, etc.}, a group of the formula SR.sup.6 {wherein R.sup.6 represents a hydrogen atom, an alkyl group, etc.}, a group of the formula ##STR2## {wherein R.sup.7 and R.sup.8 represent a hydrogen atom, an alkyl group, etc.}, or an imidazolyl group:R.sup.1 represents a hydrogen atom, an alkyl group, etc.;R.sup.2 represents a hydroxyl group, an alkyl group, etc.;A and B represent an alkyl group, etc.;Y represents an oxygen atom, etc.; andZ represents a methine group or a nitrogen atom.