Kumiai Chemical Industry Co., Ltd.

Ihara Chemical Industry Co., Ltd.

Kumiai Chemical Co.

Other

Fumiaki Takabe

Masatoshi Tamaru

Shigehiko Tachikawa

Ryo Hanai

Ryo Yoshida

Masahiro Sato

Norihiro Kawamura

Akira Kato

Masami Kobayashi

Yukio Uchida

Ryo Maruyama

Yoshihiro Saito

Takashi Mitsunari

Ryuji Tamai

Satoru Takahashi

Ryo Kobayashi

Takeshige Miyazawa

Makoto Fujinami

Norihisa Yonekura

Yoshihiro Yamaji

Mikio Yamaguchi

Ryohei Ueno

Ryu Kajiki

Shunichirou Fukumoto

Yuuki Hirano

Sohei Asakura

Ikumi Urushibata

Atsushi Yasuda

Akira Funyu

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 R, R, R, R, R, R, R, R, and Rare 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.

Methods for producing nitroso compound and quinoxaline compound

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. 

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], Xis an oxygen atom or a sulfur atom; X, X, and Xare to each CH or N(O); m is an integer of 0 or 1; Ris a hydrogen atom, a Calkyl group, or the like; Ris a halogen atom, a cyano group, or the like; n is an integer of 0 to 4; Ris a hydroxyl group, a halogen atom, or the like; Ais C(RR); Ais C(RR) or C&#x2550;O; Ais C(RR); and R, R, R, R, R, and Rare each independently a hydrogen atom or a Calkyl group.

Ring-fused 2-pyridone derivatives and herbicides

A pyridone derivative represented by Formula [1] or an agriculturally acceptable salt thereof: wherein Ris a Calkyl group, a Calkenyl group, a Calkynyl group, or the like; Rand Rare 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.

Pyridone derivative and herbicide

Pyrimidine derivatives and herbicides containing them

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.

Picolinic acid derivative and herbicidal composition

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.

Picolinic acid derivative, and herbicidal composition

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

Pyrimidine or triazine derivatives

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:

Triazine derivatives and herbicidal composition containing the same

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:

Pyrimidine derivatives and herbicidal composition containing the same

Growing community of inventors

Shizuoka, Japan

Fumiaki Takabe