Straightforward Access to Novel Indolo[2,3-b]indoles via Aerobic Copper-Catalyzed [3 + 2] Annulation of Diarylamines and Indoles
2020
Herein, we reported an unprecedented aerobic copper-catalyzed [3 + 2] annulation reaction of diarylamines with indoles, which allows direct access to novel 2-diarylaminoindolo[2,3-b]indoles, a class of potential photoelectric device molecules. The developed transformation proceeds with broad substrate scope, good functional group tolerance, high chemo-selectivity, and no need for pre-preparation of specific agents, which offers a practical way for diverse and atom-economic synthesis of the desired products that are difficult to prepare with the conventional approaches.
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