Abstract
A convenient and an efficient method for the synthesis of 14-aryl-14H-dibenzo [a,j] xanthenes and bis(naphthalen-2-yl-sulfane) derivatives is described. The reaction proceeded via condensation of aldehydes with 2-naphthol or 2-thionaphthol in the presence of polyvinylpolypyrrolidone-supported boron trifluoride. These reactions were studied under different conditions. In terms of reaction time and yield, it was found that optimum results were obtained for the synthesis of 14-aryl-14H-dibenzo [a,j] xanthenes under solvent free technique at 120 OC and for preparation of bis(naphthalen-2-yl-sulfane) derivatives in 1,2-dichloroethan under reflux conditions. Clean methodologies, easy workup procedure, high yield and simple preparation of the catalyst are some advantages of this work.
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