Cu–Mg (24: 76) Alloy: An Efficient Catalyst for Friedel–Crafts Acylation of Arenes

Friedel–Crafts acylation of different arenes was carried out in the presence of Cu–Mg (24:76) alloy under microwave irradiation and solvent-free conditions. Different substrates undergo acylation predominantly at the para-position. An efficient, simple, selective Friedel–Crafts acylation reaction affords good yields of the products and the catalyst could be easily recovered and recycled.