Pyrimidine derivatives and herbicidal composition
AssigneesKumiai Chemical Industry Co., Ltd., Ihara Chemical Industry Co., Ltd.
InventorsMasahiro Sato, Koichiro Kaku, Shigehiko Tachikawa
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Abstract
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.
Claims12
A pyrimidine derivative having the formula, ##STR91## wherein R.sup.1 is (1) a trifluoromethylsulfonyloxy group;
- (2) a group of the formula, ##STR92## wherein R.sup.5 is a hydrogen atom, a lower alkyl group or a lower alkoxy group, R.sup.6 is a hydrogen atom, a lower alkyl group, a cyano group or a nitro group, and R.sup.7 is a hydrogen atom, a lower alkyl group, a phenyl group, an alkoxycarbonyl group, a haloalkoxycarbonyl group, a phenoxycarbonyl group, a cyano group, a nitro group, a thienyl group, a furyl group or a pyridyl group, with the proviso that R.sup.5, R.sup.6 and R.sup.7 can not all be hydrogen and with the proviso that none of groups R.sup.5, R.sup.6 and R.sup.7 can be methyl;
- (3) a group of the formula [--C.dbd.CR.sup.8 ] --C.tbd.CR.sup.8, wherein R.sup.8 is a lower alkyl group, with the proviso that R.sup.8 can not be methyl, a lower alkenyl group, a lower alkoxy group, an alkoxyalkyl group, an alkylthioalkyl group, a phenyl group, a haloalkyl group, a cycloalkyl group, a cycloalkenyl group, a trimethylsilyl group, a cyanoalkyl group, a trifluoromethyl group, an acyloxyalkyl group, or an aminoalkyl group which may be substituted with an alkyl group or a benzyl group;
- or
- (4) a group of the formula, ##STR93## wherein R.sup.11 and R.sup.12 are the same or different, and are a hydrogen atom, a lower alkyl group or a benzyl group, and n is 3 or 4;
- R.sup.2 is a hydrogen atom, a lower alkyl group, a lower alkenyl group, a lower alkynyl group, a benzyl group, a 2-trimethylsilylethyl group, an alkoxyalkyl group, an alkylthioalkyl group, an alkoxycarbonylalkyl group, a cyanoalkyl group, a nitroalkyl group, or a cation of an alkali metal, an alkaline earth metal or an organic amine;
- R.sup.3 and R.sup.4 are the same or different, and are a halogen atom, a lower alkyl group, a lower alkoxy group, a difluoromethoxy group, a trifluoromethyl group, or an amino group which may be substituted with a lower alkyl group;
- X is an oxygen atom or a sulfur atom;
- and z is a roethine group, or its salt.
Dependencies are inferred from the claim text.