ABSTRACT
An efficient green procedure for the preparation of 12-aryl- or 12-alkyl-8,9,10,12-tetrahydrobenzo[α]xanthen-11-one derivatives, employing three-component one-pot condensation reaction of β-naphthol, aldehydes, and cyclic 1,3-dicarbonyl compounds, in the presence of Zr(HSO4)4 under solvent-free conditions, has been described. The present protocol offers several advantages such as high yields, shorter reaction time, simple workup, recovery and reusability of catalyst.
The authors gratefully acknowledge the financial support from the Research Council of Arak University.
Notes
a All reactions carried out at 125°C.
b Isolated yields.
a The products were characterized by IR, 1HNMR, 13C NMR, and elemental analysis.
b Isolated yields.
a All reactions carried out at 125°C.
b Isolated yields.