Volume 62, Issue 8 e202217051
Communication

Copper-Catalyzed Enantioselective C1,N-Dipolar (3+2) Cycloadditions of 2-Aminoallyl Cations with Indoles

Lulu Shen

Lulu Shen

State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071 P. R. China

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Dr. Yin Zheng

Dr. Yin Zheng

State Key Laboratory of Synthetic Chemistry, Department of Chemistry, University of Hong Kong, Hong Kong, P. R. China

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Zitong Lin

Zitong Lin

State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071 P. R. China

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Tianzhu Qin

Tianzhu Qin

State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071 P. R. China

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Prof. Dr. Zhongxing Huang

Prof. Dr. Zhongxing Huang

State Key Laboratory of Synthetic Chemistry, Department of Chemistry, University of Hong Kong, Hong Kong, P. R. China

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Prof. Dr. Weiwei Zi

Corresponding Author

Prof. Dr. Weiwei Zi

State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071 P. R. China

Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300071 China

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First published: 23 December 2022
Citations: 6

Graphical Abstract

A binuclear copper-catalyzed (3+2) cycloaddition of 2-aminoallyl cations with indoles was achieved. This transformation featured a unique C1,N-dipolar cycloaddition reactivity for 2-aminoallyl cations. Enantioenriched pyrroloindoline derivatives were prepared by this cycloaddition in high yields with good enantio- and diastereoselectivities.

Abstract

2-Aminoallyl cations are versatile 1,3-dipoles that could potentially be used for diverse (3+n) cycloaddition reactions. Despite some preliminary studies, the asymmetric catalytic transformation of these species is still underdeveloped. We herein report a binuclear copper-catalyzed generation of 2-aminoallyl cations from ethynyl methylene cyclic carbamates and their enantioselective (3+2) cycloaddition reaction with indoles to construct chiral pyrroloindolines. This transformation features a novel C1,N-dipolar reactivity for 2-aminoallyl cations.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

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