Lewis-Acid-Mediated BenzotriazoleRing Cleavage (BtRC) Strategyfor the Synthesis of 2-Aryl Benzoxazoles from N-Acylbenzotriazoles

摘要

A Lewis-acid-mediated ring cleavage of acylbenzotriazoles (RCOBt) followed by cyclization to corresponding benzoxazoles was achieved in good to excellent yields. The reaction was found consistent with the milligram to gram scale.