Dearomatization of 3-Nitroindoles by a Phosphine-Catalyzed Enantioselective [3+2] Annulation Reaction. 2019

Kaizhi Li, and Théo P Gonçalves, and Kuo-Wei Huang, and Yixin Lu
Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore.

The dearomatization of 3-nitroindoles through a chiral-phosphine-mediated [3+2] annulation reaction is described. This method makes use of readily available 3-nitroindoles as an aromatic feedstock and rapidly delivers a wide range of cyclopentaindoline alkaloid scaffolds in a highly enantioselective manner. Notably, phosphine-triggered cyclization has not been utilized previously in a dearomatization process.

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