Abdolkarim Zare - Department of Chemistry, Payame Noor University, P.O. BOX ۱۹۳۹۵-۴۶۹۷, Tehran, Iran
Fatemeh Monfared - Department of Chemistry, Payame Noor University, P.O. BOX ۱۹۳۹۵-۴۶۹۷, Tehran, Iran

Melamine trisulfonic acid (MTSA) is utilized as a highly efficient catalyst for the solvent-free condensation of 2-naphthol with arylaldehydes under conventional thermal or microwave irradiation to give 14-aryl-14H-dibenzo[a,j]xanthenes in high to excellent yields and in short reaction times.

14-Aryl-14H-dibenzo[a,j]xanthene, melamine trisulfonic acid (MTSA), 2-naphtol, arylaldehyde, solvent-free, microwave