Synthesis of Indole‐Fused Chromane‐Based Spirooxindoles via Brønsted Acid‐Catalyzed Regioselective [5+1] Annulation
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DOI: 10.1002/ejoc.202401405
Abstract: A regioselective [5+1] annulation of 2‐(1H‐indol‐2‐yl)phenols with isatins was established by the catalysis of Brønsted acid. Through this strategy, indole‐fused chromane‐based spirooxindoles bearing a quaternary carbon center were synthesized in moderate to good yields (53%… read more here.
Keywords: regioselective annulation; fused chromane; indole fused; chromane based ... See more keywords