Rhodium‐Catalyzed [3+2]‐Annulation of ortho‐Diazoquinones with Enol Ethers: Diversity‐Oriented Total Synthesis of Aflatoxin B₂

AbstractA simple and efficient approach for synthesizing substituted and fused polycyclic 2,3‐dihydrobenzofurans has been developed through a Rh‐catalyzed [3+2]‐annulation of ortho‐diazoquinones with enol ethers. This methodology has a broad substrate scope and has been employed for the concise total synthesis of natural product aflatoxin B2.