Original Article
Iman Ganji, Hassan Ghasemnejad
Abstract
N-Propylsulfamic acid supported on tomagnetic Fe3O4 nanoparticles (MNPs-PSA) is an efficient, readily available, and reusable catalyst for the synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes (3a-o) by condensation of â-naphthol (2) and aldehydes (1a-o) under solvent free in good to high yields. Themagnetic nanocatalyst can be readily recovered easily by applying an external magnet device and reused for at least 10 reaction runs without considerable loss of reactivity.