| 摘要 |
NEW MATERIAL:The compound of formula III (R<1> is cyano, formyl, dialkylamino, phenyl, pyridyl, trimethylsilyl, naphthyl, alkoxycarbonyl, benzoyl, alkylthio, phenylthio, alkylsulfonyl or benzyloxy; R<2> is Cl or OCH3; X is halo gen; n is 1-3). EXAMPLE:6-(4,6-Dimethoxypyrimidin-2-yl) oxy-2-fluorobenzoic acid 2-trimethylsil yl)ethyl ester. USE:An active component for herbicide. Useful as a herbicide suitable for the treatment of paddy field, plowed land, non-crop land, etc. It exhibits excellent herbicidal effect especially against nut grass and Johnson grass and has high safety to crops. PREPARATION:The objective compound of formula III can be produced e.g. by reacting a phenol compound of formula I with a pyrimidine compound of formula II in the presence of a base preferably in a solvent at a temperature between room temperature and the boiling point of the solvent for 1-24hr.
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