Bi(OTf)3‐Catalyzed Cyclocondensation of Oxygenated Arylacetic Acids with Salicyl Alcohols. Synthesis of 5‐Oxadibenzo[a,d]cycloocten‐6‐ones

Abstract Bi(OTf) 3 ‐catalyzed one‐pot tandem cyclocondensation of oxygenated arylacetic acids with salicyl alcohols provides 5‐oxadibenzo[ a , d ]cycloocten‐6‐ones in moderate to good yields under the refluxing MeNO 2 conditions. A plausible mechanism is proposed and discussed here. In the overall reaction process, water was the only byproduct which was generated. Various metal triflates‐promoted reaction conditions are investigated for the one‐pot efficient (4+4) annulation. magnified image