Rhodium-catalyzed reactions of 3-diazoindolin-2-imines with enamines and their extensions towards 5H-pyrazino[2,3-b]indoles
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Add time:07/13/2019 Source:sciencedirect.com
The rhodium-catalyzed reactions of 3-diazoindolin-2-imines with β-enamino esters furnished 2,3-diaminoindoles in excellent yields with wide functional group tolerance. The synthesized 2,3-diaminoindoles could be converted into 5H-pyrazino [2,3-b]indoles via a sequential dehydrogenation/6π-ERC/aromatization process.
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