Synthesis and chiral purification of 14C-labeled novel neonicotinoids, paichongding
作者:Chao Li、Xiao-Yong Xu、Ju-Ying Li、Qing-Fu Ye、Zhong Li
DOI:10.1002/jlcr.1921
日期:2011.11
Paichongding, a novel neonicotinoids pesticide with excellent insecticidal activity against imidacloprid-resistant brown planthopper, has been sold in the Chinese market as new pesticide. [14C]Paichongding was proposed as a tracer to support the further study to elucidate the metabolism of the commercialized pesticide. This paper describes an efficient synthesis of [14C]paichongding in five radiochemical steps from [14C]nitromethane (1). Then the four diastereoisomers (a, b, c, and d) were separated by preparative chiral HPLC and characterized by HPLC and HPLC-LSC. This methodology could be utilized in the syntheses of other 14C-labeled nitromethylene neonicotinoids derivatives. Copyright © 2011 John Wiley & Sons, Ltd.
拍虫啶,一种新型烟碱类杀虫剂,对吡虫啉抗性褐飞虱具有优异的杀虫活性,在我国作为新农药销售。[14C]拍虫啶被提议作为示踪剂,以支持进一步研究阐明其作为商业化农药的代谢过程。本文描述了一种高效的[14C]拍虫啶合成方法,通过五个放射化学步骤从[14C]硝基甲烷(1)合成得到。随后通过制备型手性高效液相色谱分离出四种对映异构体(a、b、c和d),并通过高效液相色谱和高效液相色谱-线性扫描检测器进行表征。这一方法可应用于其他14C标记的硝甲基烟碱类化合物的合成。版权所有 © 2011 John Wiley & Sons, Ltd.