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Syntheses and herbicidal activity of pyrazolyl benzoxazole derivatives

✍ Scribed by Na Xue; Yuhan Zhou; Guowei Wang; Weirong Miao; Jingping Qu

Publisher
Journal of Heterocyclic Chemistry
Year
2009
Tongue
English
Weight
119 KB
Volume
47
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

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In recent years, protoporphyrinogen oxidase (Protox) inhibitor herbicides are developed rapidly, because of this type of herbicides shows high herbicidal activity and low toxicity. In this paper, we prepared a series of new substituted pyrazolyl benzoxazole derivative, which were synthesized from 4‐fluorophenol, via a serial of reactions included chlorination, acylation, condensation, ring closure, methylation, nitration, and so on. All the structures are confirmed by ^1^H NMR, MS and element analysis. Preliminary bioassay shows that most substituted pyrazolyl benzoxazole derivatives exhibit high herbicidal activity to the tested gramineous weeds and latifoliate weeds. J. Heterocyclic Chem., (2010).

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