[12] Das B., Laxminarayana K., Krishnaiah M., Srinivas Y
., An Efficient and Convenient, Protocol for the Synthesis of Novel 12-aryl-or 12-alkyl-8, 9, 10, 12-tetrahydrobenzo [a], xanthen-11-one Derivatives,
Synlett,
(20): 3107-3112 (2007).
[31] Tamami B., Borujen K.P., Poly (vinylpyridine) Supported Reagents: A Review, Iran. Polym. J., 18(3): 191-206 (2009).
[32] Mohammadpoor-Baltork I., Moghadam M., Mirkhani V., Tangestaninejad S., Tavakoli,H.R.,
Highly Efficient and Green Synthesis of 14-aryl (alkyl)-14H-dibenzo [a, j], xanthene and 1, 8-Dioxooctahydroxanthene Derivatives Catalyzed by Reusable Zirconyl, Triflate [ZrO (OTf) 2] under Solvent-Free Conditions,
Chin. Chem. Lett,
22(1): 9-,12 (2011).
[40] Bigdeli M. A., Nemati F., Mahdavinia G. H., Doostmohammadi H., Chin. Chem. Lett, 20: 1275 (2009).
[42] Thirupathi B., Das, P., Mahender, I., Reddy V. S., Rao Y. K.,
Amberlyst-15: An Efficient Reusable Heterogeneous Catalyst for the Synthesis of 1, 8-Dioxo-Octahydroxanthenes and 1, 8-Dioxo-Decahydroacridines,
J. Mol. Catal. A: Chem.,
247: 233-239 (2006).