Mitsubishi Chemical Industries Limited

Mitsubishi Kasei Corporation

Koichi Yoneyama

Tetsuo Takematsu

Makoto Konnai

Seiichi Suzuki

Hisao Watanabe

Tetsuo Jikihara

Manabu Katsurada

Toyohiko Shike

Osamu Ikeda

Hiroyoshi Omokawa

Kazuyuki Ushinohama

Disclosed herein is a sulfonamide compound represented by the formula (I): ##STR1## wherein A represents a phenyl group which may be substituted, B represents a phenyl group which may be substituted, R represents a lower alkyl group, a lower alkoxy group or a lower haloalkyl group, W represents a hydroxyl group or a halogen atom, and z represents a halogen atom, a lower alkysulfonyloxy group which may be substituted, or a phenylsulfonyloxy group which may be substituted, and a herbicidal composition containing the sulfonamide compound as an effective ingredient.

Sulfonamide and herbicide containing the same as active ingredient

An N-(2,3-epoxypropylene)-N-aralkylsulfonamide of formula (I): ##STR1## wherein R.sup.1 is an alkyl group, a haloalkyl group, an aralkyl group or an aryl group which may be substituted, R.sup.2 and R.sup.3, independently of each other, are a hydrogen atom or an alkyl group, R.sup.4 and R.sup.4', independently of each other, are a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom, R.sup.5, R.sup.6 and R.sup.7, independently of each other, are a hydrogen atom, an alkyl group, a haloalkyl group or an aryl group, and n is 0 or 1. The novel compounds have excellent herbicidal effect based on the physiological selectivity between rice plant and weeds, and have low phytotoxicity against rice plant.

N-(2,3-Epoxypropylene)-n-aralkylsulfonamide and herbicidal compositions

Growing community of inventors

Utsunomiya, Japan

Koichi Yoneyama