基于天然产物Mevalocidin手性中心的结构类似物的设计与合成（英文）  

Design and Synthesis of Natural Product Mevalocidin Chiral Center Based Analogues

作　　者：吴琼友[1] 张锐 潘金环 John Clough 顾玉成 杨光富 Wu Qiongyou;Zhang Rui;Pan Jinhuan;Clough John;Gu Yucheng;Yang Guangfu(Key Laboratory of Pesticide ＆ Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079;Syngenta, Jealott＇s Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom)

机构地区：[1]华中师范大学化学学院农药与生物教育部重点实验室,武汉430079 [2]Syngenta, Jealott's Hill International Research Centre

出　　处：《有机化学》2018年第4期840-845,共6页Chinese Journal of Organic Chemistry

基　　金：Project supported by the National Natural Science Foundation of China(No.21472063)~~

摘　　要：Mevalocidin是从Rosellinia DA092917和Fusarium DA056446菌株中分离到的一种天然产物,在4 kg/ha的高剂量下具有苗后除草活性.希望对其手性中心进行改造以提高除草活性,通过设计不同合成路线,合成了2个类似物,通过~1H NMR、^(13)C NMR及HRMS对所合成化合物的结构进行了确认.活性筛选结果表明,所合成的目标化合物不具有除草活性,说明天然产物手性中心上的甲基和羟基对其活性保持至关重要,为进一步结构修饰提供了指导.Mevalocidin is a phytotoxin, produced by two fimgal isolates designated Rosellinia DA092917 and Fusarium DA056446, and has a broad spectrum of post emergence herbicidal activity at relatively high rate （4 kg/ha）. Structural modifi- cation of mevalocidin at its chiral center was investigated with the aim of discovering of novel herbicides with improved activ- ity. In order to determine the role of hydroxyl and methyl groups of mevalocidin exhibiting the herbicidal activity, we designed （_＋）-deoxy-mevalocidin （1） and （_＋）-demethyl-mevalocidin （2）, respectively. These two designed compounds were synthe- sized （racemate） through two different synthetic approaches and characterized by 1H NMR, 13C NMR and HRMS spectra. The herbicidal activities of the synthesized compounds were evaluated against both dicotyledon and monocotyledon weeds. Bioas- say results indicated that the both synthesized analogues lost the herbicidal activity when compared to parent and it demon- strated that methyl and/or hydroxyl groups at the chiral center of mevalocidin are crucial for its herbicidal activity. Thus, this study will provide insights into the structural modification of mevalocidin.

关 键 词：天然产物 Mevalocidin 结构改造 手性中心 除草活性 

分 类 号：O629[理学—有机化学]