W. Bao
2008
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Journal
Chemical Journal of Chinese Universities-chinese
Abstract
Tetrazoles and 1,3,4-oxadiazoles are important heterocyclic compounds with a wide range of pharmaceutical and biological activity.Their syntheses and herbicidal activity have been of interest for a long time.In our previous research,a series of 4-alkoxy(benzyloxy)benzamidines were synthsized and showed a favourable herbicidal activity and KARI inhibitory activity.For searching potent herbicidal activity compounds,in this paper,five 4-alkoxy/benzyloxyphenyltetrazoles and seventeen new 2-substituted-5-(4-alkoxy/benzyloxy)phenyloxadiazoles were designed on the basis of the structure of 4-alkoxy(benzyloxy)benzamidine and synthesized via 4-cyanophenol as the starting material.All synthesized novel compounds were confirmed by elemental analysis,1H NMR and MS.The preliminary herbicidal assay indicates that some of them displayed a good herbicidal activity on di-cotyledonous rape(Brassica campestris)and mono-cotyledonous barnygrass(Echinochloa crusgalli).