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. 2021 Feb 10;12:932. doi: 10.1038/s41467-021-21156-w

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — a Examination of the role of ambient light. b Probing the radical pathway of copper-catalyzed Chan-Lam coupling. c Spin trapping experiments. d Light on/off experiment with copper-catalyzed Chan-Lam coupling reaction of 1a and 2a.