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Shaoyong Ke,Ting Ke,Zhigang Zhang,Liqiao Shi,Daye Huang,Kaimei Wang,Ziwen Yang,Nina Yang 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.3
The phytophagous mite is highly polyphagous and widespread in warmer regions and greenhouses around the world, and so the focus of novel acaricides is shifting towards more effective, ecofriendly new chemical entity with unique modes of action. In this study, eighteen spirobutyrolactones derived from natural tetronic acid have been synthesized and their acaricidal activities against Tetranychus cinnabarinus were investigated by slide-dip method. The results of preliminary bioassay indicate that some of these compounds exhibited promising acaricidal activities, especially, compounds 6 and 18 show significant activities against T. cinnabarinus than the commercial spirodiclofen 1 (27.37% mortality), and which present 58.55% and 82.24% mortality at tested dose, respectively. The relationship between structure and acaricidal activity was also discussed based on the experimental data, and which indicate that the compounds (16, 17 and 18) with non-substituted phenyl ring (R1=H) show obviously better activities. Especially, we also can find that substituted benzoyl unit will help to increase the activity than substituted phenylacetyl group.
Ke, Shaoyong,Sun, Tingting,Zhang, Zhigang,Zhang, Ya-Ni,Liang, Ying,Wang, Kaimei,Yang, Ziwen Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.8
Twenty spirodiclofen analogues have been designed and conveniently synthesized via three steps including esterification, one-pot heterocyclization, and acylation reactions. The target molecules have been identified on the basis of analytical spectra ($^1H$ NMR, $^{13}C$ NMR and ESI-MS) data. All newly synthesized compounds have been screened for their potential insecticidal and herbicidal activity by standard method. The preliminary assays indicated that some of analogues displayed moderate to good insecticidal activity against Plutella xylostella compared with spirodiclofen, and some compounds showed obvious activity against Brassica chinensis. Structure-activity relationship (SAR) is also discussed based on the experimental data.
Shaoyong Ke,Tingting Sun,Zhigang Zhang,Ya-Ni Zhang,Ying Liang,Kaimei Wang,Ziwen Yang 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.8
Twenty spirodiclofen analogues have been designed and conveniently synthesized via three steps including esterification,one-pot heterocyclization, and acylation reactions. The target molecules have been identified on the basis of analytical spectra (1H NMR, 13C NMR and ESI-MS) data. All newly synthesized compounds have been screened for their potential insecticidal and herbicidal activity by standard method. The preliminary assays indicated that some of analogues displayed moderate to good insecticidal activity against Plutella xylostella compared with spirodiclofen,and some compounds showed obvious activity against Brassica chinensis. Structure-activity relationship (SAR) is also discussed based on the experimental data.