Ihara Chemical Industry Co., Ltd.

Kumiai Chemical Industry Co., Ltd.

Kumiai Chemical Co.

Masahiro Sato

Shigehiko Tachikawa

Ryo Yoshida

Masatoshi Tamaru

Fumiaki Takabe

Norihiro Kawamura

Koichiro Kaku

The present invention provides a herbicidal composition containing a novel pyrimidine derivative having the formula (1), ##STR1## wherein R.sup.1 is a trifluoromethanesulfonyioxy group, an ethenyl group which may be substituted, or an ethynyl group which may be substituted; R.sup.2 is a hydrogen atom, an alkyl group, 2-trimethylsilyl ethyl group; R.sup.3 and R.sup.4 are the same or different, and are a methoxy group or a halogen atom; X is an oxygen atom or a sulfur atom; and Z is a methine group; or its salt, as an active ingredient. The pyrimidine derivative of the present invention exhibits an excellent herbicidal effect against noxious weeds which grow in paddy fields, upland fields and non-agricultural fields.

Pyrimidine derivatives 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:

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Fukuroi, Japan

Masahiro Sato