A Mild Method for Access to α‐Substituted Dithiomalonates through C‐Thiocarbonylation of Thioester: Synthesis of Mesoionic Insecticides
作者:Xinyue Yang、Yanrong Ma、Huiming Di、Xiaochen Wang、Hui Jin、Do Hyun Ryu、Lixin Zhang
DOI:10.1002/adsc.202100369
日期:2021.7
An efficient method for targeting a variety of symmetrical and asymmetrical α-substituted dithiomalonates (DTMs) is described, utilizing 1H-imidazole-1-carbothioates as reactive acylating agents and MgBr2⋅OEt2/DBU or LiHMDS for soft or hard enolization conditions of thioesters, respectively. The utility of this methodology was demonstrated through the synthesis of the pyridopyrimidine mesoionic insecticides:
描述了一种针对各种对称和非对称 α-取代二硫代丙二酸酯 (DTM) 的有效方法,利用 1 H -咪唑-1-碳硫代酸酯作为活性酰化剂,将 MgBr 2 ⋅OEt 2 /DBU 或 LiHMDS 用于软或硬烯醇化条件分别为硫酯。这种方法的实用性通过吡啶并嘧啶中离子杀虫剂的合成得到了证明:三氟嘧啶和双氯灭活。