The acid-catalyzed Friedel–Crafts reaction of alcohols and electron-rich aromatic compounds is a highly atom-efficient method for the preparation of aromatic compounds with diverse applications, and only water is generated as the byproduct.[1, 2] During the past decade, significant progress has been made in the development of a catalytic version of this transformation, including the construction of hindered allcarbon quaternary centers.[1, 3] ...