Nippon Kayaku Kabushiki Kaisha

Sankyo Company, Limited

Mikio Yanagi

Fumio Futatsuya

Osamu Yamada

Tetsuya Toya

Hiroyasu Sugizaki

Toshiaki Yanai

Shizuo Shimano

Shinji Yokoi

Yoshihisa Tsukamoto

Akio Masui

Atsuhiko Shida

Yasuhito Kato

Kenji Kobayashi

Shinichi Kobayashi

Yoshimi Yajima

Seiichirou Kodama

Yoshihiro Sawada

Tetsuo Watanabe

Hidetoshi Shirakura

Mikio Saito

Shuji Kawada

Hiroki Hotta

The present invention can provide a process for the preparation of an 1-acyl-2-substituted hydrazine compound from a mixture containing the 1-acyl-2-substituted hydrazine and an 1-acyl-1-substituted hydrazine by selective hydrolysis or alcoholysis of the 1-acyl-yl-1-substituted hydrazine in the presence of an acid catalyst, and by separation of the resulting carboxylic acid and derivative thereof. The 1-acyl-2-alkyl hydrazine obtained has a high purity.

Process for preparation of 1-acyl-2-substituted hydrazines

A novel hydrazine derivative and a pesticidal composition containing the hydrazine derivative as the effecting ingredient. The hydrazine derivative show high pesticidal activity against harmful pests which are resistant to known pesticides such as organophosphorus pesticides, pyrethroids, etc., especially against Lepidoptera harmful pests such as Plutella xylostella, Spodoptera litura, Cnaphalocrocis medinalis, Adoxophyes orana, etc., and is effective for controlling harmful pests in paddy field, upland field, orchard, forest or places to be kept environmentally hygienic.

Hydrazine derivative and pesticidal composition comprising said

A novel hydrazine derivative and a pesticidal composition containing the hydrazine derivative as the effecting ingredient. The hydrazine derivative show high pesticidal activity against harmful pests which are resistant to known pesticides such as organophosphorus pesticides, pyrethroids, etc., especially against Lepidopters harmful pests such as Plutella xylostella, Spodoptera litura, Cnaphalocrocis medinalis, Adoxophyes orana, etc., and is effective for controlling harmful pests in paddy field, upland field, orchard, forest or places to be kept environmentally hygienic.

New hydrazine derivative and pesticidal composition comprising said

Disclosed is a compound exhibiting herbicidal activity of the formula: ##STR1## wherein R.sup.1 is hydrogen, halogen or methyl, R.sup.2 is hydrogen, halogen or lower alkyl, R.sup.3 is lower alkyl which may be substituted by halogen or methylsulfonyl, benzyl or phenyl which may be substituted by halogen or nitro, R.sup.4 is hydrogen; lower alkyl which may be substituted by carboxy or lower alkoxycarbonyl; lower alkenyl; lower alkynyl; methylsulfonyl or benzyl which may be substituted by halogen, X is hydrogen, halogen or C.sub.1 -C.sub.2 -alkyl, Y is C.sub.1 -C.sub.2 -alkyl, X may make --(CH.sub.2).sub.3 -- or --(CH.sub.2).sub.4 -- together with Y, W is halogen.

Herbicidal 5-halo-1-[5-(N-substituted sulfonylamino)phenyl]pyrazole

New herbicidal N-substituted-.DELTA..sup.1 -tetrahydrophthalimide derivatives represented by the formula: ##STR1##

N-substituted-.DELTA..sup.1 -tetrahydrophthalimide derivatives

A compound of the formula: ##STR1## wherein Z is ##STR2## wherein R.sub.4 is lower alkyl, X and Y are oxygen or sulfur and n is an integer of 3 to 6, R.sub.1 is hydrogen or halogen, R.sub.2 is halogen and R.sub.3 is hydrogen or C.sub.1 -C.sub.8 -alkyl which may have lower alkoxy; a herbicidal composition containing said compound as an effective component; a method for killing weeds using said compound; and processes for the production of said compound, are disclosed hereinafter.

1H[1,2,4]-Triazolo[1,2-a]pyridazine-1,3-diones useful as herbicides

A compound of the formula: ##STR1## wherein R.sub.4 is lower alkyl, X is oxygen or sulfur, and n is integer of 3 or 4; R.sub.1 is hydrogen or halogen; R.sub.2 is halogen; R.sub.3 is hydrogen or C.sub.1 -C.sub.8 -alkyl which may have lower alkoxy; a herbicidal composition containing said compound as an effective component; a method for killing weeds using said compound; and processes for the production of said compound, are disclosed hereinafter.

Heterocyclic compound and a herbicidal composition containing said

A new N-substituted tetrahydroisophthalimde derivative represented by the formula: ##STR1## Wherein R.sub.1 and R.sub.2 are hydrogen or halogen, R.sub.3 is hydrogen or lower alkyl and R.sub.4 is alkyl which may be substituted by halogen or lower alkoxy, and preparation methods thereof and herbicidal composition comprising one or more of said derivatives as active ingredients, is disclosed.

N-Substituted-tetrahydroisophthalimide derivatives

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Okegawa, Japan

Mikio Yanagi