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With the increase of herbicide-resistant weeds, novel, more selective and even more potent herbicides to control weeds are needed. In this paper, a series of N-fluorinated phenyl-N0-pyrimidyl urea derivatives were synthesized and screened for their herbicidal activities against Amaranthus retroflexus(AR) and Setaria viridis(SV). Compound 25(N-(3-trifluoromethylphenyl)-N0-(2-amino-4-chloro-6-methylpyrimidyl) urea) exhibited marked herbicidal activity against SV(IC50= 11.67 mg/L) and is more potent than bensulfuron(IC50= 27.45 mg/L), a commercially available herbicide. A statistically significant CoMFA model with high prediction abilities(q2= 0.869, r2= 0.989) was obtained.
In the paper, a series of N-fluorinated phenyl-N0-pyrimidyl urea derivatives were synthesized and screened for their herbicidal activities against Amaranthus retroflexus (AR) and Setaria viridis (SV). Compound 25 (N- (3-trifluoromethylphenyl) -N0- (1 = mg / L) and is more potent than bensulfuron (IC50 = 27.45 mg / L), a commercially available herbicide.