开发了一种通过光诱导N-苯基苯甲酰胺分子内环化合成菲啶-6(5 H )-ones的通用简明方法。在氩气和室温下,在甲苯中甲磺酸存在下,通过用 280 nm 紫外灯照射N-苯基苯甲酰胺,得到菲啶-6(5 H )-酮。该机理被说明并认为按照酰胺互变异构、6π-电环化、[1,5]-H 位移、酰胺-亚胺互变异构、酮-烯醇互变异构和放氢的顺序进行。
Visible-Light-Promoted Iron-Catalyzed <i>N</i>-Arylation of Dioxazolones with Arylboronic Acids
作者:Jing-Jing Tang、Xiaoqiang Yu、Yoshinori Yamamoto、Ming Bao
DOI:10.1021/acscatal.1c04538
日期:2021.11.19
A visible-light-promoted and simple iron salt-catalyzed N-arylation was achieved efficiently under external photosensitizer-free conditions. Arylboronic acids and bench-stable dioxazolones were used for this cross-coupling reaction. This reaction features high reactivity, wide substrate scope, good functional group tolerance, simple operation procedure, and mild reaction conditions. Preliminary mechanistic
Synthesis of Secondary Amides through the Palladium(II)-Catalyzed Aminocarbonylation of Arylboronic Acids with Amines or Hydrazines and Carbon Monoxide
作者:Jin Zhang、Yuqiang Ma、Yangmin Ma
DOI:10.1002/ejoc.201701802
日期:2018.4.17
A new Pd‐catalyzed aminocarbonylation of arylboronic acids with amines or hydrazines produces secondary amides. The method exhibits good atom‐economy and a wide functional group tolerance.
A Convenient Synthesis of<i>N</i>-Aryl Benzamides by Rhodium-Catalyzed<i>ortho</i>-Amidation and Decarboxylation of Benzoic Acids
作者:Xian-Ying Shi、Ke-Yan Liu、Juan Fan、Xue-Fen Dong、Jun-Fa Wei、Chao-Jun Li
DOI:10.1002/chem.201406031
日期:2015.1.26
The rhodium‐catalyzed amidation of substituted benzoic acids with isocyanates by directed CH functionalization followed by decarboxylation to afford the corresponding N‐aryl benzamides is demonstrated, in which the carboxylate serves as a unique, removable directing group. Notably, less common meta‐substituted N‐aryl benzamides are generated readily from more accessible para‐ or ortho‐substituted
Fe-catalysed oxidative C–H functionalization/C–S bond formation
作者:Haibo Wang、Lu Wang、Jinsai Shang、Xing Li、Haoyuan Wang、Jie Gui、Aiwen Lei
DOI:10.1039/c1cc16184a
日期:——
Iron was used as the catalyst for the direct C-H functionalization/C-S bond formation under mild conditions. Various substrates could afford benzothiazoles in moderate to excellent yields. Preliminary mechanisticstudies revealed that pyridine played a crucial role for the high yields and selectivities.
Synthesis of Amides by Mild Palladium-Catalyzed Aminocarbonylation of Arylsilanes with Amines Enabled by Copper(II) Fluoride
作者:Jin Zhang、Yanyan Hou、Yangmin Ma、Michal Szostak
DOI:10.1021/acs.joc.8b02874
日期:2019.1.4
A general Pd-catalyzed synthesis of amides by oxidative aminocarbonylation of arylsilanes undermildconditions was accomplished for the first time. The reaction is promoted by a commercially available copper(II) fluoride, which acts as a dual silane activator and mild oxidant, enabling highly efficient aminocarbonylation of versatile arylsilanes at atmospheric CO pressure. The reaction is tolerant