| abstract |
Pyrimidine derivatives represented by general formula (I) which have an excellent herbicidal activity and a selectivity on crops from weeds, and herbicides containing these pyrimidine derivatives as the active ingredient. In said formula, R1 represents hydrogen, alkyl, haloalkyl, etc.; R2 represents alkyl, optionally substituted phenyl, etc.; R3 represents hydrogen, alkyl, alkynyl, etc.; R7 represents hydrogen, halogeno, alkyl, etc.; R8 represents hydrogen, alkyl, etc.; W represents -C(=Q)Z- or -SO¿2?- (wherein Q represents O or S; and Z represents O, S, -C(R?4)R5-, NR6¿, etc. (wherein R?4 and R5¿ represent each hydrogen, alkyl, alkoxy, etc.; and R6 represents hydrogen or alkyl;)); and Ar represents optionally substituted phenyl, optionally substituted pyridyl, etc. |