Copper-catalyzed [4 + 2] annulation reaction of β-enaminones and aryl diazonium salts without external oxidant: synthesis of highly functionalized 3H-1,2,4-triazines via homogeneous or heterogeneous strategy
Literature Information
Publication Date
2020-01-06
DOI
10.1039/C9QO01413F
Impact Factor
5.281
Authors
Mingrui Li, Yiming Sun, Yang Yu
View Original
Abstract
Herein, both homogeneous and heterogeneous strategies were developed to access highly functionalized 3H-1,2,4-triazines using Cu-catalyzed [4 + 2] annulation. This new protocol featured external oxidant-free conditions, a non-noble copper catalyst and good functional group compatibility. The multiple valence states of copper were further confirmed by X-ray photoelectron spectroscopy.
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Organic Chemistry Frontiers
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