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DOI: 10.1055/s-0037-1610672
Copper-Catalyzed C(sp3)–H Azidation of 1,3-Dihydro-2H-indol-2-ones Under Mild Conditions
This research is sponsored by the National Natural Science Foundation of China (Grant 21801142), the Natural Science Foundation of Zhejiang Province (No. LQ18B020002), State Key Laboratory of Analytical Chemistry for Life Science (No. SKLACLS1804), the Open Subject of State Key Laboratory of Chemo/Biosensing and Chemometrics (2017016), Education Foundation of Zhejiang Province (No. Y201737123), and the K. C. Wong Magna Fund in Ningbo University.Publication History
Received: 15 August 2018
Accepted after revision: 16 October 2018
Publication Date:
14 November 2018 (online)


◊These authors contributed equally to this work.
Abstract
A simple and economical synthesis of 3-substituted 3-azido-1,3-dihydro-2H-indol-2-ones has been realized under mild conditions through copper-catalyzed C(sp3)–H azidation of the corresponding 1,3-dihydro-2H-indol-2-ones with trimethylsilyl azide. The reaction proceeds by an efficient pathway involving the addition of a N3 radical to the enol tautomer and consecutive C(sp3)−N bond formations. The method is valuable because of its mild reaction conditions, short reaction times, and broad substrate scope, and because of the rich biological activity of the resulting 3-substituted 3-azido-1,3-dihydro-2H-indol-2-one products.
Keywords
copper catalysis - radical reaction - azidoindolinones - indolinones - azidation - trimethylsilyl azideSupporting Information
- Supporting information for this article is available online at https://doi.org/10.1055/s-00360037-1610672.
- Supporting Information