Catalytic Asymmetric Formal [3+2] Cycloaddition of Azoalkenes with 3-Vinylindoles: Synthesis of 2,3-Dihydropyrroles.

Guang-Jian Mei, Wenrui Zheng, Theo Goncalves, Xiwen Tang, Kuo-Wei Huang, Yixin Lu

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28 Scopus citations

Abstract

Chiral phosphoric acid-catalyzed highly enantioselective formal [3 + 2] cycloaddition reaction of azoalkenes with 3-vinylindoles has been established. Under mild conditions, the projected cycloaddition proceeded smoothly, affording a variety of 2,3-dihydropyrroles in high yields and excellent enantioselectivities, and also in a diastereospecific manner. As opposed to the common 4-atom synthons in the previous literature reports, azoalkenes served as 3-atom synthons. Besides, the observed selectivity was supported by primary theoretical calculation. The unique chemistry of azoalkenes disclosed herein will empower asymmetric synthesis of nitrogen-containing ring structural motifs in a broader context.
Original languageEnglish (US)
Pages (from-to)100873
JournaliScience
Volume23
Issue number2
DOIs
StatePublished - Feb 17 2020

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: Y.L. thanks the Singapore National Research Foundation, Prime Minister’s Office for the NRF Investigatorship Award (R-143-000-A15-281). Financial supports from the National University of Singapore (R-143-000-695-114 & C-141-000-092-001) and the National Natural Science Foundation of China (21672158 & 21702077) are also gratefully acknowledged.

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