Organic Letters
Organic Letters
5 years ago

Synthesis of Dihydropyridinone-Fused Indoles and α-Carbolines via N-Heterocyclic Carbene-Catalyzed [3 + 3] Annulation of Indolin-2-imines and Bromoenals

Synthesis of Dihydropyridinone-Fused Indoles and α-Carbolines via N-Heterocyclic Carbene-Catalyzed [3 + 3] Annulation of Indolin-2-imines and Bromoenals
Dequn Sun, Liang Yi, Yuyang Zhang, Zhao-Fei Zhang, Song Ye
The N-heterocyclic carbene catalyzed [3 + 3] annulation of indolin-2-imines and bromoenals was developed to give dihydropyridinone-fused indoles in good to high yields, which were transformed to α-carbolines with different 2-subsituents by a process of dehydrogenation, tosylation, and palladium catalyzed C–C or C–N coupling reaction.

Publisher URL: http://dx.doi.org/10.1021/acs.orglett.7b00820

DOI: 10.1021/acs.orglett.7b00820

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