Synthesis of Furans via Rhodium(II) Acetate‐Catalyzed Reaction of Acetylenes with α‐Diazocarbonyls: Ethyl 2‐Methyl‐5‐Phenyl‐3‐Furancarboxylate

Synthesis of furans via rhodium(II) acetate-catalyzed reaction of acetylenes with α-diazocarbonyls: ethyl 2-methyl-5-phenyl-3-furancarboxylate reactant: p-acetamidobenzenesulfonyl azide intermediate: ethyl diazoacetoacetate product: ethyl 2-methyl-5-phenyl-3-furancarboxylate Keywords: addition, to CC; annulation, heterocyclic-[5]; cyclization, cycloaddition; cyclization, free radical-carbenoid/nitrenoid; diazo transfer; metal-catalyzed reactions, rhodium; replacement reactions, halogen by azide; dichloromethane (methylene chloride); p-acetamidobenzenesulfonyl azide; diazo compounds; sodium azide, toxic, explosion hazard; sodium azide, disposal