Chemoselective Cu-catalyzed synthesis of diverse <i>N</i>-arylindole carboxamides, β-oxo amides and <i>N</i>-arylindole-3-carbonitriles using diaryliodonium salts
Chemoselective copper-catalyzed synthesis of diverse N-arylindole-3-carboxamides, β-oxo amides and N-arylindole-3-carbonitriles from readily accessible indole-3-carbonitriles, α-cyano ketones and diaryliodonium salts has been developed. Diverse N-arylindole-3-carboxamides and β-oxo amides were successfully achieved in high yields under copper-catalyzed neutral reaction conditions, and the addition
Copper-catalyzed aerobic oxyarylation of [1,2,3]triazolo[1,5-a]pyridines is developed. Notably molecular oxygen was utilized as one of the reagents and the transformation resulted in the formation of novel pyridinium triazolinone ylides. A basic mechanism for the one-pot process is proposed and further functionalization of the ylidic products were also presented.
Pd-Catalyzed Regioselective Mono-Arylation: Quinazolinone as the Inherent Directing Group for C(sp<sup>2</sup>)–H Activation
作者:Dnyaneshwar N. Garad、Amol B. Viveki、Santosh B. Mhaske
DOI:10.1021/acs.joc.7b00948
日期:2017.6.16
The Pd-catalyzed quinazolinone-directed regioselective monoarylation of aromatic rings by C–H bond activation is developed. A broad substrate scope is demonstrated for both quinazolinone as well as diaryliodonium triflates. The use of a base was found to be crucial for this transformation, unlike for the known nitrogen-directed arylations. All of the novel quinazolinones of biological interest were
Catalyst‐Free Arylation of Tertiary Phosphines with Diaryliodonium Salts Enabled by Visible Light
作者:Dmitry I. Bugaenko、Alexey A. Volkov、Mikhail V. Livantsov、Marina A. Yurovskaya、Alexander V. Karchava
DOI:10.1002/chem.201902955
日期:2019.9.25
The visible-light-induced arylation of tertiaryphosphines with aryl(mesityl)iodonium triflates to produce the quaternary phosphonium salts occurs under mild, metal, and catalyst-free conditions. Photo-excited EDA complexes between diaryliodonium salts and phosphines supposedly enable this transformation, which is difficult to achieve through the traditional ground-state reactions. Demonstrating high
Copper-catalysed N-arylation of fused triazoles using diaryliodonium salts as an aryl source is described. This scalable protocol displayed good compatibility towards diverse sensitive functional groups like ester, alkyl and nitro groups and halogens (F, Cl, Br). The synthetic usefulness of the prepared triazolium salts was proved by preparing α-hydroxyketone through benzoin condensation. Photophysical