| 摘要 |
A class of 6-arylpyrimidines which is useful in the control of weeds is of the general formulae: I and II wherein R2 is selected from hydrogen, halo, substituted or unsubstituted alkyl, haloalkyl, polyhaloalkyl, haloalkenyl, polyhaloalkenyl, haloalkynyl, polyhaloalkynyl, alkenyl, alkynyl, alkoxy, alkylthio, alkoxycarbonylalkyl, cyano, alkoxyalkyl, alkoxycarbonyl, cycloalkyl, aralkyl, alkylamino, dialkylamino, or dialkylaminocarbonyl group; R3 is an alkyl, alkenyl, alkynyl, or haloalkyl group; R5 is an alkyl, alkenyl, alkynyl, alkenynyl, or alkoxyalkyl, group; R6 is an aryl group (e.g. aromatic ring); and X is oxygen or sulfur. R2 and R3 may form a fused ring.
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