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. 2020 Mar 23;11:1511. doi: 10.1038/s41467-020-15345-2

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© The Author(s) 2020

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. 4 — Unless otherwise noted, the reactions were run in 0.3 mmol scale of 2a, 1:2a:3a = 1/1/0.33. All yields shown were based on isolated products. Ee values were determined by chiral HPLC analysis. Dr values was determined by ¹H NMR of the crude reaction mixture. ^aThe reactions were run in 0.3 mmol scale of 2a, 1:2a:3 = 3/1/0.33.