The Fries rearrangement reaction is the synthesis of o- or para-acyl phenols from phenolic esters catalyzed by Lewis or Brønsted acids (e.g., HF, AlCl3, BF3, TiCl4, or SnCl4).The Fries rearrangement reaction was first reported by the German chemist Karl Theophil Fries, after whom it was named, ...
