Electrochemical Oxidative C—H Sulfenylation of Imidazopyridines with Hydrogen Evolution
作者:Yong Yuan、Yangmin Cao、Jin Qiao、Yueping Lin、Xiaomei Jiang、Yaqing Weng、Shan Tang、Aiwen Lei
DOI:10.1002/cjoc.201800405
日期:2019.1
Selective oxidativeC—H sulfenylation of imidazopyridine heterocycles is achieved using an undivided electrolytic cell. The reaction avoids the use of stoichiometric amount of external chemical oxidant and produces hydrogen gas as the only byproduct. Both aryl and aliphatic thiols demonstrate good reactivity for C—S bond formation.
Aerobic Multicomponent Tandem Synthesis of 3-Sulfenylimidazo[1,2-<i>a</i>]pyridines from Ketones, 2-Aminopyridines, and Disulfides
作者:Wenlei Ge、Xun Zhu、Yunyang Wei
DOI:10.1002/ejoc.201300905
日期:2013.9
reaction was developed for the synthesis of 3-sulfenylimidazo[1,2-a]pyridinesfrom easily available ketones, 2-aminopyridines, and disulfides without DMSO or peroxide as an oxidant. This three-component tandem reaction process involves the formation of imidazo[1,2-a]pyridines followed by Friedel–Crafts sulfenylation in one pot under mild conditions. Both aryl and alkyl ketones afforded the desired products
Unconventional Reactivity with DABCO-<i>Bis</i>
(sulfur dioxide): C-H Bond Sulfenylation of Imidazopyridines
作者:Julie Le Bescont、Chloé Breton-Patient、Sandrine Piguel
DOI:10.1002/ejoc.202000112
日期:2020.4.16
Exploring the unexpected reactivity of DABCO‐bis(sulfur dioxide) on various imidazo[1,2‐a]pyridines expanded the toolbox of the sulfenylation reagent. Starting from three simple building blocks, this three‐component transformation led to various C‐3 sulfenylated substituted imidazo[1,2‐a]pyridines in moderate to good yields.
探索DABCO-双(二氧化硫)在各种咪唑并[1,2- a ]吡啶上的出乎意料的反应性,扩大了亚磺酰化试剂的工具箱。从三个简单的结构单元开始,这种由三部分组成的转化以中等到良好的产率产生了各种C-3磺化取代的咪唑并[1,2- a ]吡啶。
Oxidative dual C–H thiolation of imidazopyridines with ethers or alkanes using elemental sulphur