Zirconium‐β Zeolite‐Catalyzed Continuous‐Flow Friedel‐Crafts Acylation Reaction

H‐β Zeolites, doped with various metal salts, were investigated as heterogeneous catalysts for continuous‐flow Friedel‐Crafts acylation reactions. It was found that Zr‐β zeolites possessed excellent catalyst activity and stability, which enabled its use as a catalyst, up to 5 days, for Friedel‐Crafts reactions between various activated arenes and acid anhydrides. Challenging substrates, such as toluene and m‐xylene, were also successfully applied for the continuous‐flow process. H‐β zeolite, doped with zirconium, was found to be an excellent heterogeneous catalyst for the continuous‐flow Friedel‐Crafts acylation reaction of arenes with acid anhydrides. Control experiments and characterization studies of the used H‐β and Zr‐β zeolites revealed that the metal dopant improves the stability of the catalyst.