Semisynthesis of novel N ‐acyl/sulfonyl derivatives of 5(3,5)‐(di)halogenocytisines/cytisine and their pesticidal activities against Mythimna separata Walker, Tetranychus cinnabarinus Boisduval, and Sitobion avenae Fabricius

2019 ◽  
Vol 75 (10) ◽  
pp. 2598-2609 ◽  
Author(s):  
Xiaobo Huang ◽  
Min Lv ◽  
Hui Xu
Keyword(s):  
Sitobion Avenae ◽  
Tetranychus Cinnabarinus ◽  
Mythimna Separata ◽  
Derivatives Of

scholarly journals Synthesis and Insecticidal Activities of Novel Nitrogenous Derivatives of Celangulin-V

2014 ◽  
Vol 9 (6) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Jiwen Zhang ◽  
Lihui Cui ◽  
Longbo Li ◽  
Zhan Hu ◽  
Qianliang Zhang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Biological Activity ◽  
Insecticidal Activity ◽  
Structural Factors ◽  
Mythimna Separata ◽  
Lead Structure ◽  
The Third ◽  
First Time ◽  
Derivatives Of ◽  
Insecticidal Activities

In order to develop new biorational pesticides and clarify the potential structural factors needed for the biological activity of celangulin-V analogues, thirty novel nitrogenous derivatives were designed and synthesized. The single crystal structure of celangulin-V is reported for the first time and provides a more accurate structure than that previously reported. The structures of all the new derivatives were confirmed by either NMR or ESI-MSn analysis. Insecticidal activities of these compounds were tested against the third-instar larvae of Mythimna separata. One derivative (1–6) showed higher insecticidal activity than celangulin-V, with a KD50 of 231.2 μg.g–1, while two compounds (2–13 and 2–14) exhibited lower insecticidal activities; the others revealed no activity at a concentration of 20 mg mL−1. The results support the view that celangulin-V has the potential to be a lead structure of semi-synthetic green insecticides.

scholarly journals Semisynthesis of esters and oxime esters/sulfonates from furyl-ring-based acetylation derivatives of fraxinellone as insecticidal agents

RSC Advances ◽  
2017 ◽  
Vol 7 (45) ◽  
pp. 28009-28015 ◽  
Author(s):  
Yong Guo ◽  
Ruige Yang ◽  
Hui Xu
Keyword(s):  
Mythimna Separata ◽  
Structure Activity Relationships ◽  
Structure Activity ◽  
Derivatives Of

Two compounds 9a and 10i exhibited the most promising pesticidal activity against early 3rd-instar larvae of Mythimna separata. Their structure–activity relationships were also observed.

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