Samarium Diiodide-Induced Couplings of Carbonyl Compounds with Methoxyallene Leading to 4-Hydroxy 1-Enol Ethers

A surprising samarium diiodide-induced coupling reaction of carbonyl compounds with methoxyallene provided 4-hydroxy 1-enol ethers, which are versatile synthetic building blocks. In this coupling reaction, methoxyallene serves as an acrolein equivalent, which cannot directly be employed.