Zeinab Arzehgar - Department of Chemistry, Payame Noor University, PO BOX ۱۹۳۹۵-۴۶۹۷ Tehran, Iran
Abdelkarim Aydi - Department of Chemical and Materials Engineering, College of Engineering, National College of Chemical Industry, Nancy, Polytechnic Institute of Lorraine, France Frankfurt Am Main Area, Germany
Mohammad Mirzaei Heydari - School of Environment, Natural Resources & Geography, Bangor University, Bangor, Gwynedd, Wales, United Kingdom

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.

γ-Fe۲O۳@HAp-Ag Lewis acidic catalyst ۱۴-aryl-۱۴Hdibenzo[a, j]xanthenes Rusable of catalyst