An article Synthesis of novel 9R/S-acyloxy derivatives of cinchonidine and cinchonine as insecticidal agents WOS:000515759700001 published article about ASYMMETRIC-SYNTHESIS; RESISTANCE; INHIBITORS; ALKALOIDS in [Che, Zhi-Ping; Yang, Jin-Ming; Zhang, Song; Sun, Di; Tian, Yue-E; Liu, Sheng-Ming; Lin, Xiao-Min; Jiang, Jia; Chen, Gen-Qiang] Henan Univ Sci & Technol, Coll Forestry, Dept Plant Protect, Lab Pesticidal Design & Synth, Luoyang 471023, Peoples R China in 2021, Cited 25. Category: phthalazines. The Name is 4-Nitrobenzoic acid. Through research, I have a further understanding and discovery of 62-23-7
Endeavor to discover biorational natural products-based insecticides, two series (27) of novel 9R/S-acyloxy derivatives of cinchonidine and cinchonine were prepared and assessed for their insecticidal activity against Mythimna separata in vivo by the leaf-dipping method at 1 mg/mL. Among all the compounds, especially derivatives 6l and 6o exhibited the best insecticidal activity with final mortality rates of 75.0% and 71.4%, respectively. Overall, a free 9-hydroxyl group is not a prerequisite for insecticidal activity and C9-substitution is well tolerated; the configuration of C8/9 position is important for insecticidal activity, and 9S-configuration is optimal; 6′-OCH3 moiety is not necessary, removal of it is also acceptable.
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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem