Tokuyama Soda Kabushiki Kaisha

Tokuyama Corporation

Masahiko Ishizaki

Seiji Nagata

Tetsuo Takematsu

Junji Takenaka

Shozo Kato

Toshihisa Suyama

Tadashi Kobutani

Disclosed herein are cyanoketone derivatives of the following formula (1) ##STR1## such as 1-cyano-1-piperidinocarbonyl-3-[4-(2-chloro-4-trifluoromethylphenoxy)pheno xy]-2-butanone, 1-cyano-1-piperidinocarbonyl-3-[4-(3-chloro-5-trifluoromethyl-2-pyridyloxy )phenoxy]-2-butanone, 1-cyano-1-(N-methyl-N-dichlorophenyl)aminocarbonyl-3-[4-(2-quinoxalyloxy)p henoxy]-2-butanone, 1-cyano-1-(N,N-dibutyl)aminocarbonyl-3-[4-(3-chloro-5-trifluoromethyl-2-py ridyloxy)phenoxy-2-butanone, and the like, which are characterized by excellent herbicidal activity and effectiveness against a variety of gramineous weeds.

Cyanoketone derivative and herbicide containing it as an active component

A cyanoketone derivative of the following formula (1) ##STR1## wherein A.sub.1 is a substituted or unsubstituted phenyl or naphthyl group or a substituted or unsubstituted heterocyclic group;

Carbonyl acetonitrile derivative and herbicide containing it as an

An N-substituted chloroacetanilide represented by the following formula (I) ##STR1## wherein A represents a member selected from the class consisting of halogen atoms, alkoxy groups having a linear or branched, saturated or unsaturated C.sub.1 -C.sub.6 alkyl group, alkylthio groups having a linear or branched, saturated or unsaturated C.sub.1 -C.sub.6 alkyl group, and alkoxyalkyl groups having a linear or branched, saturated or unsaturated C.sub.1 -C.sub.6 alkyl group and having a linear or branched, saturated or unsaturated C.sub.1 -C.sub.6 alkylene group, R.sub.1, R.sub.2 and R.sub.3 are identical or different, and each represents a hydrogen atom, a halogen atom, a linear or branched, saturated or unsaturated C.sub.1 -C.sub.6 alkyl group, an alkoxy group having a linear or branched, saturated or unsaturated C.sub.1 -C.sub.6 alkyl group R is a hydrogen atom or a linear or branched, saturated or unsaturated C.sub.1 -C.sub.4 alkyl group, or an alkylthio group having a linear or branched, saturated or unsaturated C.sub.1 -C.sub.6 alkyl group, and n represents 1 or 2, and when n is 2, the two A's may be identical or different; a process for producing the above compound by reacting an N-substituted aniline with a chloroacetyl halogenide or by reacting a 2-substituted thiophene with a chloroacetanilide; and a herbicidal composition containing a herbicidally effective amount of the compound of formula (I).

N-substituted chloroacetanilides processes for production thereof, and

Growing community of inventors

Tsukuba, Japan

Masahiko Ishizaki