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Synthesis and herbicidal activity of N-oxide derivatives. 2000
H Cerecetto, and
E Dias, and
R Di Maio, and
M González, and
S Pacce, and
P Saenz, and
G Seoane, and
L Suescun, and
A Mombrú, and
G Fernández, and
M Lema, and
J Villalba
Cátedra de Cereales y Cultivos Industriales, Facultad de Agronomía, Universidad de la República, Paysandú, Uruguay. hcerecet@bilbio.edu.uy
As part of an ongoing program on the chemistry and biological activity of N-oxide-containing molecules, a number of novel 1,2, 5-oxadiazole N-oxide, benzo[1,2-c]1,2,5-oxadiazole N-oxide, and quinoxaline N,N'-dioxide derivatives were synthesized and evaluated for their herbicidal activity. Many of these compounds exhibited moderate to good herbicidal pre-emergence activity against Triticum aestivum. Dose-response studies were done on the more representative compounds (12, 20, and 26). The most active compound, butylcarbamoylbenzo[1,2-c]1,2,5-oxadiazole N-oxide, 26, displayed herbicidal activity at concentrations as low as 24 g/ha.
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