Semisynthesis and insecticidal activity of some fraxinellone derivatives modified in the B ring.


A series of novel fraxinellone derivatives modified at the C-1 or C-8 position in the B ring were prepared as insecticidal agents against the pre-third-instar larvae of oriental armyworm, Mythimna separata Walker at 1 mg/mL. Five key steric configurations of compounds 2, 3, and 8f,g,j were further determined by single-crystal X-ray diffraction. It was found… (More)
DOI: 10.1021/jf404195m


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