从容易获得的咪唑并[1,2- a ]吡啶和叠氮化钠开始合成4 H-吡啶并[1,2- a ] [1,3,5]三嗪-4-的快速简便的方法在有氧氧化条件下出现。反应进行得很好,促进了过硫酸钾/高锰酸钾的吸收,并且具有良好的官能团耐受性。通过这种方法组装了多种具有生物学价值的4 H-吡啶并[1,2- a ] [1,3,5]三嗪-4-1支架。也实现了克级反应。反应中可能涉及级联的硝化和氧化再循环序列。
3-(3-Aryloxyaryl)imidazo[1,2-a]pyridine sulfones as liver X receptor agonists
摘要:
Replacement of a quinoline with an imidazo[1,2-a]pyridine in a series of liver X receptor (LXR) agonists incorporating a [3-(sulfonyl)aryloxyphenyl] side chain provided high affinity LXR ligands 7. In functional assays of LXR activity, good agonist potency and efficacy were found for several analogs. (C) 2009 Elsevier Ltd. All rights reserved.
Iodine-Mediated Difunctionalization of Imidazopyridines with Sodium Sulfinates: Synthesis of Sulfones and Sulfides
作者:Yu-Jing Guo、Shuai Lu、Lu-Lu Tian、En-Ling Huang、Xin-Qi Hao、Xinju Zhu、Tian Shao、Mao-Ping Song
DOI:10.1021/acs.joc.7b02734
日期:2018.1.5
Novel iodine-induced sulfonylation and sulfenylation of imidazopyridines have been described using sodium sulfinates as the sulfur source. This strategy enables highly selective difunctionalization of imidazo[1,2-a]pyridine to access sulfones and sulfides in good yields. A wide range of substrates and functional groups were well-tolerated under optimized conditions. Moreover, control experiments have
已经描述了使用亚磺酸钠作为硫源的新的碘诱导的咪唑并吡啶的磺酰化和亚磺酰化。该策略能够使咪唑并[1,2- a ]吡啶高度选择性地进行双官能化,从而以高收率获得砜和硫化物。在最佳条件下,各种底物和官能团均具有良好的耐受性。此外,已经进行了对照实验,表明了反应机理中涉及的自由基途径。
Three‐Component C–H Bond Sulfonylation of Imidazoheterocycles by Visible‐Light Organophotoredox Catalysis
The first examples of visible‐lightinduced direct sulfur dioxide insertion on imidazoheterocycles have been developed using an organic photoredox catalyst at room temperature and DABCO·(SO2)2. The formation of 2 new C–S bonds, without further pre‐functionalization, in metal‐free and mild conditions render this three‐component approach sustainable and green and led to novel and valuable C‐3 sulfonylated
electrochemical oxidative C–H thiocyanation or selenocyanation of imidazopyridines was achieved by using an undivided electrolytic cell. Transition-metal- and oxidant-free conditions are striking features of this protocol. A library of thiocyanated imidazopyridines with a broad range of functional groups were synthesized in high yields. This method was also applicable to the thiocyanation or selenocyanation of
An efficient onepot, three component synthesis of C3 sulfonamidomethylated imidazopyridines has been disclosed under metal-free conditions, which utilized the commercially available and renewable reagent methanol as the main methylene source. A wide range of substituted imidazopyridines and sulfamides/amines were well tolerated to afford the corresponding products in up to 92% yield. In the isotopic
Copper-Mediated C–H Amination of Imidazopyridines with <i>N</i>-Fluorobenzenesulfonimide
作者:Shuai Lu、Lu-Lu Tian、Tian-Wei Cui、Yu-Shen Zhu、Xinju Zhu、Xin-Qi Hao、Mao-Ping Song
DOI:10.1021/acs.joc.8b02348
日期:2018.11.16
A copper-mediated direct C3 amination of imidazopyridines has been disclosed under additive-free conditions in short reaction times. This methodology utilizes commercially available N-fluorobenzenesulfonimide (NFSI) as the amino source, which exhibits broad substrate scope and good functional group tolerance. The obtained C3-aminated imidazopyridines can undergo further desulfonylation transformations