https://pubs.rsc.org/en/content/articlepdf/2014/cc/c3cc47081d

Aerobic oxidation catalysis with stable radicals

The organic nitroxyl radical, TEMPO (2,2,6,6-tetramethylpiperidine-N-oxyl), finds a variety of industrial applications for chemical transformations. Because of economic and environmental concerns, ...

TEMPO in Chemical Transformations: From Homogeneous to Heterogeneous

Oxidative Dearomatization of Indoles via Pd-Catalyzed C–H Oxygenation: An Entry to C2-Quaternary Indolin-3-ones

Copper-Catalyzed Oxidative Dearomatization/Spirocyclization of Indole-2-Carboxamides: Synthesis of 2-Spiro-pseudoindoxyls

A straightforward method for the synthesis of indolin-3-ones bearing a C2-quaternary functionality is reported. A series of 2,2-disubstituted indolin-3-ones were constructed in up to 94% yields in the absence of a metal catalyst. This cross-coupling reaction allows the facile synthesis of 2,2-disubstituted indolin-3-ones from readily available substrates in a short reaction time.

Metal-free synthesis of 2,2-disubstituted indolin-3-ones.

A simple, convenient, and efficient synthesis of 2-(1H-indol-3-yl)-2,3′-biindolin-3-one derivatives has been developed by the oxidative trimeric reaction of indoles using the TEMPO/CuCl2 catalyst s...

Copper-catalyzed oxidative trimerization of indoles by using TEMPO to construct quaternary carbon centers: the synthesis of 2-(1H-indol-3-yl)-2,3′-biindolin-3-ones

LiuLiang-Xian

Papers

Copper-catalyzed oxidative trimerization of indoles by using TEMPO to construct quaternary carbon centers: the synthesis of 2-(1H-indol-3-yl)-2,3′-biindolin-3-ones