developed for the synthesis of 2-acylquinolines from methyl ketones and arylamines using 1,4-dithane-2,5-diol as an ethylene surrogate. Moreover, the investigation of the mechanism suggested that this reaction occurred via an iodination/Kornblum oxidation/Povarov/aromatization sequence. It is noteworthy that the arylamine substrate also played an important role in promoting the reaction.
Acyl Radicals from Terminal Alkynes: Photoredox-Catalyzed Acylation of Heteroarenes
作者:Shaista Sultan、Masood Ahmad Rizvi、Jaswant Kumar、Bhahwal Ali Shah
DOI:10.1002/chem.201801628
日期:2018.7.25
A photoredox‐mediated acylation reaction of electron deficient heteroarenes with terminalalkynes is reported. The method relies on oxidative cleavage of phenylacetylenes for generation of acylradicals as a key enabling feature. The reaction is regioselective with broad substrate scope. Quantum yield investigations support a radical chain mechanism.
A palladium-catalyzed ring-expansion reaction of cyclobutanols with 2-haloanilines leading to benzazepines and quinolines
作者:Xiao-Qin Shen、Xiao-Wei Yan、Xing-Guo Zhang
DOI:10.1039/d1cc04395a
日期:——
A general synthesis of 2-aryl benzazepines has been developed through palladium-catalyzed ring-expansion reactions of cyclobutanols with 2-haloanilines; the further oxidative rearrangement reaction of benzazepines provided an efficient synthesis of 2-acyl quinolines. These transformations feature the efficient construction of six- and seven-membered N-containing heterocycles from easily obtained materials