Silver functionalized on hydroxyapatite-core-shell magnetic γ-Fe۲O۳: An enviromentaly and readily recyclable nanatalyst for the one-pot synthesis of ۱۴H-dibenzo[a,j]xanthenes derivatives

An efficient and simple procedure for the preparation of silver functionalized on hydroxyapatite-core-shell magnetic γ-Fe۲O۳ nanoparticles (γ-Fe۲O۳@HAp-Ag)as an enviromentaly efficient magnetically recoverable and reusable catalyst is described, and it is used for the one-pot synthesis of ۱۴-aryl-۱۴H-dibenzo[a,j]xanthenes via a cost-effective and atom-economical procedure from substituted benzaldehydes and β-naphthol under solvent-free conditions at ۶۰ °C. The attractiveness of this protocol lies in its green approach in that the catalyst is easily recoverable using an external magnet, which makes the process economical.