Polystyrene Supported Al(OTf)₃: an Environmentally Friendly Heterogeneous Catalyst for Friedel-Crafts Acylation of Aromatic Compounds

Abstract

Stable and non-hygroscopic polystyrene supported aluminium triflate (Ps-Al(OTf)3), which is prepared easily from cheap and commercially available compounds was found to be an environmentally friendly heterogeneous catalyst for Friedel-Crafts acylation of arenes using acid chlorides in the absence of solvent under mild reaction conditions. The catalyst can be reused up to five times after simple washing with dichloromethane.

An Efficient and Green Synthesis of 1‐Indanone and 1‐Tetralone via Intramolecular Friedel–Crafts Acylation Reaction

“…[5,[7][8][9][10] Metal triflates are efficient and green catalysts for Friedel-Crafts acylation. [11][12][13][14][15][16][17][18][19][20][21][22] Recently, metal-triflate-catalyzed Friedel-Crafts acylation with carboxylic acids as the acylating reagents has been studied extensively. [23][24][25][26][27] Although the intramolecular Friedel-Crafts acylation of carboxylic acids has been catalyzed by metal triflates with only 5-10 %c atalytic loading, the requirement for volatile organic solvents and long reactiont imes are current shortcomings.…”