intramolecular cyclization of electron-rich α-aryl ketones. The alkoxy substituent on the benzene ring in the substrates was essential for an efficient cyclization to occur. This novel method allows the construction of benzo[b]furan rings by joining the O-atom on the side chain to the benzene ring via direct oxidative aromatic C−O bond formation.
通过FeCl 3介导的富电子α-芳基酮的分子内环化,获得了多种3-官能化的苯并[ b ]呋喃。底物中苯环上的烷氧基取代基对于有效环化的发生至关重要。这种新方法允许通过直接氧化芳香族C-O键形成将侧链上的O原子与苯环相连,从而构造苯并[ b ]呋喃环。