Sagami Chemical Research Center

Kaken Pharmaceutical Company, Ltd.

Chisso Corporation

Sadayuki Ugai

Kenji Hirai

Tomoyuki Yano

Emiko Ejiri

Osamu Yamada

Tomoko Matsukawa

Tomoko Yoshii

Yuichi Onji

Shoin Nagato

Mitsuo Yamashita

Kiyomi Aizawa

Tomoko Tateno

Kikuko Harasawa

Koichi Shikakura

Shigeki Kishi

Katsuyuki Masuda

Natsuko Okano

Takehito Mouri

Hydantoin derivatives and herbicides containing said derivatives as

4-imino-oxazolidine-2-one derivatives, a process for producing such

The present invention relates to 3,4,5,6-tetrahydrophthalamide derivatives and 3,4,5,6-tetrahydroisophthalimide derivatives having excellent effects as effective active ingredients of herbicides, and processes for preparing the same, and provides the compounds having a more efficient herbicidal activity, and efficient and industrial processes for the preparation thereof. More specifically, the tetrahydrophthalimide derivative obtained by reacting a halogen-substituted 5-cycloalkyloxyaniline derivative with a 3,4,5,6-tetrahydrophthalic anhydride, or the tetrahydroisophthalimide derivative of the present invention is reacted with various types of amines to prepare a tetrahydrophthalamide derivative represented by the general formula (I): ##STR1## These tetrahydrophthalamide derivatives and the tetrahydroisophthalimide derivatives exhibit excellent herbicidal activities in the soil treatment in the paddy field and field and the stem-foliar treatment. The tetrahydroisophthalimide derivatives are also useful as intermediates for the preparation of the tetrahydrophthalamide derivatives, etc.

Tetrahydrophthalamide derivative, intermediate for producing the same,

A benzene derivative substituted with a heterocyclic ring represented by the general formula: ##STR1## wherein R represents a cycloalkyl group having 3 to 8 carbon atoms, X represents a halogen atom, and Z represents ##STR2## in which said cycloalkyl group may be substituted with an alkyl group having 1 to 6 carbon atoms, a process for preparing the same, and a herbicidal agent comprising the above compound as an active ingredient are disclosed. The compound has an excellent effect in that the compound exhibits a markedly high herbicidal effect on weeds in the field and the paddy field at a low dose and yet exhibits markedly low noxious effects on main crops.

Benzene derivatives substituted with heterocyclic ring and herbicides

Benzene derivatives substituted with heterocyclic ring, and herbicides

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Shizuoka, Japan

Sadayuki Ugai