Download PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... A facile, efficient and green synthesis of aryl-14H-dibenzo[a,j]xanthenes has been developed by one-pot condensation of β-naphthol and substituted benzaldehydes in the presence of ytterbium triflates in ionic liquids. ... A facile, efficient, and green synthesis of aryl-14H-dibenzo[a,j] ...