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Novel HPPD inhibitors: triketone 2 H ‐benzo[ b ][1,4]oxazin‐3(4 H )‐one analogs
Author(s) -
Li HuaBin,
Li Lei,
Li JunXian,
Han TingFeng,
He JingLi,
Zhu YouQuan
Publication year - 2018
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.4739
Subject(s) - mesotrione , dioxygenase , stereochemistry , chemistry , in vitro , potency , biology , biochemistry , enzyme , pesticide , agronomy , atrazine
BACKGROUND Herbicides that inhibit 4‐hydroxyphenylpyruvate dioxygenase (HPPD, EC 1.13.11.27) are very important for grass weed control. In order to discover novel HPPD herbicides, a series of triketone 2 H ‐benzo[ b ] oxazin‐3(4 H )‐one analogs was designed and synthesized. RESULTS In comparison with the commercial triketone HPPD herbicide mesotrione (IC 50 = 0.252 μ M), some of these new triketone analogs displayed excellent HPPD inhibitory potency in vitro , for example B39 (IC 50 = 0.172 μ M) and B41 (IC 50 = 0.156 μ M). In addition, some of these compounds exhibited pre‐ and post‐emergence herbicidal activity similar to mesotrione when applied at 375 g/ha. CONCLUSION Many of the title compounds described in this paper could be important lead structures for the further development of novel HPPD herbicides. © 2017 Society of Chemical Industry