FeCl<sub>3</sub>-catalyzed oxidative amidation of benzylic C–H bonds enabled by a photogenerated chlorine-radical
作者:Yingying Yang、Xianglin Yu、Na He、Xinxiang Huang、Xizhong Song、Jingbo Chen、Jun Lin、Yi Jin
DOI:10.1039/d3cc03186a
日期:——
broad substrate scope (60 examples) and offer operationally simple, scalable procedures for accessing valuable products from methylarenes in a single step. Mechanisticstudies and control experiments confirm the participation of a photogenerated chlorine radical in facilitating the hydrogen atom transfer (HAT) from the benzylic C–H bond to initiate the reaction.
Iodine-promoted amide formation via oxidative cleavage of indoles: novel quinazoline-4(3H)-one and tryptanthrin syntheses
作者:Phong Q. Le、Van M. Dinh、Huong D. T. Nguyen、Hiep Q. Ha、Thanh V. Truong
DOI:10.1039/d4ra01807a
日期:——
construction of amide bonds via a selective cleavage of C–H and CC bonds in indole structures using an iodine-promoted approach was developed. Mechanistic studies indicated the formation of superoxide radicals obtained from molecular oxygen activation as a key intermediate step, which provided a precursor for subsequent oxidative ring-opening and intermolecular cyclization. A broad range of quinazolin-4(3H)-ones
一种通过选择性裂解 C-H 和 C 直接构建酰胺键的高效方法 使用碘促进的方法开发了吲哚结构中的 C 键。机理研究表明,分子氧活化形成超氧自由基是一个关键的中间步骤,为后续的氧化开环和分子间环化提供了前体。在温和且环境友好的条件下,以中等至良好的收率合成了多种喹唑啉-4(3 H )-酮和色胺酮。
Copper-Catalyzed Synthesis of 2-Arylquinazolinones from 2-Arylindoles with Amines or Ammoniums
作者:Yadong Feng、Yudong Li、Guolin Cheng、Lianhui Wang、Xiuling Cui
DOI:10.1021/acs.joc.5b00957
日期:2015.7.17
A novel copper-catalyzed synthesis of quinazolinones from easily available 2-arylindoles and amines or ammoniums has been developed, which provided various quinazolinones in up to 99% yields for 43 examples. This strategy features tolerance of a wide range of functional groups, easily available starting materials, simple operation, mild reaction conditions, and environmental friendliness.