Re-Catalyzed [3 + 3] Annulation for Rapid Assembly of Multisubstituted Pyridines from β-Enamino Esters and 1,3-Enynes/3-Ethynyl Indoles
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Although rhenium-catalyzed annulation reactions are well-established, [3 + 3] annulations have remained elusive. We herein demonstrated a Re-catalyzed [3 + 3] annulation of β-enamino esters with 1,3-enynes affording a wide range of multisubstituted pyridines ... ...
