Copper-Catalyzed C–H Carbamoyloxylation of Aryl Carboxamides with CO<sub>2</sub> and Amines at Ambient Conditions
作者:Xiang Luo、Xianheng Song、Wenfang Xiong、Jianheng Li、Mingkang Li、Zefeng Zhu、Shuxian Wei、Albert S. C. Chan、Yong Zou
DOI:10.1021/acs.orglett.9b00122
日期:2019.4.5
A copper-catalyzed, 8-aminoquinoline-assisted, one-potthree-component coupling of aryl carboxamides, CO2, and amines has been developed. This protocol proceeds smoothly in the presence of inexpensive CuI and MnO2 at room temperature under atmospheric CO2 pressure, leading to simultaneous construction of C–O and C–N bonds. The reaction displays a broad substrate scope, high functional group tolerance
Ammonia as Ultimate Amino Source in Synthesis of Primary Amines via Nickel-Promoted C–H Bond Amination
作者:Lin Yu、Chan Yang、Yongqi Yu、Da Liu、Liang Hu、Yuanjiu Xiao、Ze-Nan Song、Ze Tan
DOI:10.1021/acs.orglett.9b01968
日期:2019.7.19
The direct use of ammonia in transition-metal promoted C–H bond amination for the synthesis of primary amines is considered to be one of the major challenges in synthetic organic chemistry. Herein, we report that such transformation can be successfully achieved via nickel-promoted amination of inert arene C–H bonds with ammonia gas assisted by an 8-amino-quinoline directing group.
Transition‐Metal‐Free Cross‐Dehydrogenative Couplings of 8‐Aminoquinoline Amides at C5 Position with Acetonitrile, Ethers or Acetone
作者:Da Liu、Zhen Xia、Yuanjiu Xiao、Yongqi Yu、Lin Yu、Zenan Song、Qianlong Wu、Junhui Zhang、Ze Tan
DOI:10.1002/ejoc.202100953
日期:2021.9.21
A novel and efficient method for highly regioselective cyanomethylation, etherification or acetonation of 8-aminoquinoline amides at C5 position was developed, and such reactions proceed undertransitionmetal-free and base-free conditions.
Transition-Metal-Free Regioselective C-H Bond Fluorination of 8-Amidoquinolines with Selectfluor
作者:Hao Chen、Pinhua Li、Min Wang、Lei Wang
DOI:10.1002/ejoc.201800389
日期:2018.5.15
A simple and efficient transition‐metal‐free protocol was developed for the fluorination of the 5‐position of 8‐aminoquinolines with Selectfluor. Numerous substituted 8‐aminoquinoline amides were tolerated under the reaction conditions to give the corresponding products in good yields.
Nickel-Catalyzed Site-Selective C–H Bond Difluoroalkylation of 8-Aminoquinolines on the C5-Position
作者:Hao Chen、Pinhua Li、Min Wang、Lei Wang
DOI:10.1021/acs.orglett.6b02166
日期:2016.10.7
A simple and efficient protocol for nickel-catalyzed regioselective C–H bond difluoroalkylation of 8-aminoquinoline scaffolds with functionalized difluoromethyl bromides was developed. The reaction has broad substrate scope and provides a facile and useful access to the corresponding C5-functionalized difluoromethylated quinolines in good to excellent yields.