Reactions on a Solid Surface. A Simple, Economical and Efficient Friedel−Crafts Acylation Reaction over Zinc Oxide (ZnO) as a New Catalyst

Abstract
Zinc oxide (ZnO) brings about a rapid Friedel−Crafts acylation of a range of activated and unactivated aromatic compounds such as anisole and chlorobenzene with acid chlorides in solvent-free conditions at room temperature. The ZnO powder can be reused up to three times after simple washing with dichloromethane.