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Semisynthesis and insecticidal activity of some novel fraxinellone-based thioethers containing 1,3,4-oxadiazole moiety. 2017
Yong Guo, and
Xiaoguang Wang, and
Jiangping Fan, and
Qian Zhang, and
Yi Wang, and
Yi Zhao, and
Mengxing Huang, and
Ming Ding, and
Yanbing Zhang
Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, 450001, Henan Province, People's Republic of China.
Two series of novel fraxinellone-based thioethers containing 1,3,4-oxadiazole moiety were prepared as insecticidal agents against the oriental armyworm, Mythimna separata Walker. The structural assignment was based on the spectroscopic and X-ray analysis data. Among all the target compounds, compounds 4b, 4k, 5b, 5j and 5k exhibited more potent insecticidal activity with final mortality rates (FMRs) of more than 65%, especially 4k with the FMR of 75.9%, when compared with toosendanin. Some interesting results of structure-activity relationships are also discussed.
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