Synthesis of Dibenzo[b,e]azepin‐6(11H)‐ones via a Sequential Ugi‐4CR and Sulfur Ylide‐Mediated Rearrangement Reaction

Abstract A new one‐pot preparation of dibenzo[b,e]azepin‐6(11 H )‐one by a sequential Ugi‐4CR and sulfur ylide‐mediated rearrangement reaction has been developed. A series of polysubstituted dibenzo[b,e]azepin‐6(11 H )‐ones were obtained in 69–84 % yields from readily available sulfonium salts, 2‐aminophenyl ketones, aldehydes and isocyanides in the presence of DBU.