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A convenient copper‐promoted tandem radical reaction of 2‐oxindoles with formamides producing unsymmetrical urea derivatives is described. This radical‐mediated reaction enables the formation of one C=O and one C−N bond through a domino C−O coupling, ring cleavage and C−N coupling process, which features a broad substrate scope and excellent selectivity. In addition, tBuOOH not only acts as the oxidant, but also as the oxygen source. The proposed reaction mechanism is supported by control experiments.
Asian Journal of Organic Chemistry – Wiley
Published: Jun 1, 2018
Keywords: ; ; ; ;
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