Electrocatalytic Intermolecular C(sp<sup>3</sup>)–H/N–H Coupling of Methyl <i>N</i>-Heteroaromatics with Amines and Amino Acids: Access to Imidazo-Fused <i>N</i>-Heterocycles
作者:Peng Qian、Zicong Yan、Zhenghong Zhou、Kangfei Hu、Jiawei Wang、Zhibin Li、Zhenggen Zha、Zhiyong Wang
DOI:10.1021/acs.orglett.8b02578
日期:2018.10.19
An efficient NH4I-mediated intermolecular annulation of methyl N-heteroaromatics with amines/amino acids was developed by virtue of anodic oxidation, providing a variety of functionalized imidazo-fused N-heterocycles with good to excellent yields. The practicality of this protocol was demonstrated by the readily available starting materials, broad substrate scope, water tolerance, scalability, and
Catalyst and additive-free regioselective oxidative C–H thio/selenocyanation of arenes and heteroarenes with elemental sulfur/selenium and TMSCN
作者:Chengtao Feng、Ya Peng、Guangrong Ding、Xiangxiao Li、Chang Cui、Yizhe Yan
DOI:10.1039/c8cc07905f
日期:——
A regioselective oxidative C–H thio/selenocyanation of arenes and heteroarenes with TMSCN and elemental sulfur/selenium was demonstrated under catalyst-free and additive-free conditions. Dimethyl sulfoxide (DMSO) was employed as the mild oxidant as well as the solvent. The reaction is operationally simple and scalable with a broad substrate scope.
Copper-Promoted Double Oxidative C–H Amination Cascade for the Synthesis of Imidazo[1,5-<i>a</i>]quinolines
作者:Zhong Li、Song-Song Wu、Zai-Gang Luo、Wei-Kang Liu、Cheng-Tao Feng、Shi-Tang Ma
DOI:10.1021/acs.joc.6b00569
日期:2016.5.20
A copper-promoted cascade reaction of 2-methylazaarenes and benzylamines has been developed via sequential double oxidative C(sp3)–H aminations. This protocol provides straightforward access to imidazo[1,5-a]quinoline derivatives without employing prefunctionalized substrates.
通过连续的双氧化C(sp 3)-H胺化反应开发了2-甲基氮杂芳烃和苄胺的铜促进的级联反应。该协议无需使用预功能化的底物即可直接获得咪唑并[1,5- a ]喹啉衍生物。
Iodine mediated nitrosation of imidazo[1,5-a]N-heteroarenes using TBN ( BuONO) reagent
An iodine mediated regio-selective nitrosation of imidazo[1,5-a]N-heteroarenes is reported using TBN as nitroso source. This method afford synthetically useful and medicinally interesting 3-nitroso imidazo[1,5-a]N-heteroarenes in moderate to good yields with good functional group tolerance. Further, this reaction could applicable on gram-scale level synthesis.
碘介导的咪唑并[1,5- a ] N-杂芳烃的区域选择性亚硝化反应使用TBN作为亚硝基源。该方法以中等至良好的收率和良好的官能团耐受性提供了合成有用和医学上有趣的 3-亚硝基咪唑并 [1,5- a ] N-杂芳烃。此外,该反应可应用于克级合成。