How to cite this paper
Karami, B., Nejati, S & Eskandari, K. (2015). An adapted route to efficient synthesis of 1,8-dioxooctahydro-xanthene derivatives using InCl3 and (HPO3)n as recyclable catalysts.Current Chemistry Letters, 4(4), 169-180.
Refrences
1. Movassaghi M., and Jacobsen E. N., (2002) A direct method for the conversion of terminal epoxides into ?-butanolides. J. Am. Chem. Soc., 124, 2456-2457.
2. Qi X., Rice G. T., Lall M. S., Plummer M. S., and White M. C., (2010) Diversification of a B-lactam pharmacophore via allylic C–H amination: accelerating effect of Lewis acid co-catalyst Tetrahedron, 66, 4816-4826.
3. Wedge T. J., and Hawthorne M. F., (2003) Multidentate carborane-containing Lewis acids and their chemistry: mercuracarborands, Coord. Chem. Rev., 240, 111-128.
4. Stone M. T., and Anderson H. L., (2007) A cyclodextrin-insulated anthracene rotaxane with enhanced fluorescence and photostability. Chem. Commun., 126, 2387-2389.
5. (a) Kumar G. G. K. S., and Laali K. K., (2013) Condensation of propargylic alcohols with N-methylcarbazole and carbazole in [bmim] PF 6 ionic liquid; synthesis of novel dipropargylic carbazoles using TfOH or Bi (NO 3) 3· 5H 2 O as catalyst. Tetrahedron Lett., 54, 965-969. (b) Aridoss G., Sarca V. D., Ponder J. F. Jr., Crowe J., and Laali K. K., (2011) Electrophilic chemistry of propargylic alcohols in imidazolium ionic liquids: Propargylation of arenes and synthesis of propargylic ethers catalyzed by metallic triflates [Bi (OTf) 3, Sc (OTf) 3, Yb (OTf) 3], TfOH, or B (C 6 F 5) 3. Org. Biomol. Chem. 9, 2518-2529. (c) Kalkhambkar R. G., and Laali K. K., (2011) Highly efficient synthesis of amides via Ritter chemistry with ionic liquids. Tetrahedron Lett. 52, 5525-5529.
6. (a) Sartori G., Neto J. S. S., Pesarico A. P., Back D. F., Nogueira C. W., and Zeni G. (2013) Bis-vinyl selenides obtained via iron (III) catalyzed addition of PhSeSePh to alkynes: synthesis and antinociceptive activity. Org. Biomol. Chem., 11, 1199-1208. (b) Speranca A., Godoi B., and Zeni G. (2013) Iron (III) chloride/diorganyl diselenides: a tool for intramolecular cyclization of alkynone O-methyloximes. J. Org. Chem. 78, 1630-1637. (c) Stein A. L., Bilheri F. N., Rosario A. R., and Zeni G., (2013) FeCl 3–diorganyl dichalcogenides promoted cyclization of 2-organochalcogen-3-alkynylthiophenes: synthesis of chalcogenophene [2, 3-b] thiophenes. Org. Biomol. Chem., 11, 2972-2978.
7. Kitano M., Nakajima K., Kondo J. N., Hayashi S. and Hara M. (2010) Protonated titanate nanotubes as solid acid catalyst. J. Am. Chem. Soc., 132, 6622-6623.
8. Stefani H. A., and Gatti P. M. (2000) 3, 4-Dihydropyrimidin-2 (1H)-ones: fast synthesis under microwave irradiation in solvent free conditions. Synth. Commun., 30, 2165-2173.
9. Maleki A., Javanshir S., and Sharifi S. (2014) Silica-based sulfonic acid (MCM-41-SO3H): a practical and efficient catalyst for the synthesis of highly substituted quinolines under solvent-free conditions at ambient temperature. Curr. Chem. Lett., 3, 125-132.
10. Havaei M., Karami B., and Khodabakhshi S., (2014) Silica supported yttrium trinitrate: preparation, characterization and application in catalytic Biginelli condensation. Curr. Chem. Lett., 3 167-174
11. Clark J. H., Acc. (2002) Solid acids for green chemistry. Chem. Res., 35, 791-797.
12. El-Brashy A. M., Metwally M. E., and El-Sepai F. A., (2004) Spectrophotometric determination of some fluoroquinolone antibacterials by binary complex formation with xanthene dyes. Il Farmaco, 59, 809-817.
13. (a) Chibale K., Visser M., Schalkwyk D. V., Smith P. J., Saravanamuthu A., and Fairlamb A. H. (2003) Exploring the potential of xanthene deriva- tives as trypanothione reductase inhibitors and chloroquine potentiating agents. Tetrahedron, 59, 2289-2296. (b) Borah R., Dutta P., and Sarma P. (2013) Investigation of efficient synthesis of 1, 8-dioxo-octahydroxanthene derivatives under solvent-free grinding method. Curr. Chem. Lett., 2, 159-166.
14. Bhowmik B. B., and Ganguly P. (2005) Photophysics of xanthene dyes in surfactant solution. Spect. Chim. Acta A, 61, 1997-2003.
15. Ion R. M., Frackowiak D., and Wiktorowicz K. (1998) The incorporation of various porphyrins into blood cells measured via flow cytometry, absorption and emission spectroscopy. Acta Biochim. Pol., 45, 833-845.
16. Knight C. G., and Stephens T. (1989) Xanthene-dye-labelled phosphatidylethanolamines as probes of interfacial pH. Biochem. J., 258, 683-687.
17. Ahmad M. T., King A., Ko D. K., Cha B. H., and Lee J. (2002) Performance and photostability of xanthene and pyrromethene laser dyes in sol-gel phases. J. Phys. D: Appl. Phys., 35, 1473-1476.
18. Saint-Ruf G., Hieu H. T., and Poupelin J. P. (1975) The effect of dibenzoxanthenes on the paralyzing action of zoxazolamine. Naturwissenschaften, 62, 584-590.
19. Kinjo J., Uemura H., Nohara T., Yamashita M., Marubayashi N., and Yoshihira K., (1995) Novel yellow pigment from Pterocarpus santalinus: biogenetic hypothesis for santalin analogs. Tetrahedron Lett., 36, 5599-5602.
20. Casiraghi G., Casnati G., and Cornia M. (1973) Regiospecific reactions of phenol salts: reaction-pathways of alkylphenoxy-magnesiumhalides with triethylorthoformate. Tetrahedron Lett., 14, 679-682.
21. Bekaert A., Andrieux J., and Plat M. (1992) New total synthesis of bikaverin. Tetrahedron Lett., 33, 2805-2806.
22. Knight D. W., and Little P. B., (2001) The first efficient method for the intramolecular trapping of benzynes by phenols: a new approach to xanthenes. J. Chem. Soc. Perkin Trans.1, 14, 1771-1777.
23. Kuo C. W., and Fang J.-M., (2001) Synthesis of xanthenes, indanes, and tetrahydronaphthalenes via intramolecular phenyl–carbonyl coupling reactions. Synth. Commun., 31, 877-892.
24. Jha A., and Beal J., (2004) Convenient synthesis of 12H-benzo [a] xanthenes from 2-tetralone. Tetrahedron Lett., 45, 8999-9001.
25. Seyyedhamzeh M., Mirzaei P., and Bazgir A., (2008) Solvent-free synthesis of aryl-14H-dibenzo [a, j] xanthenes and 1, 8-dioxo-octahydro-xanthenes using silica sulfuric acid as catalyst. Dyes Pigm., 76, 836-839.
26. Karami B., and Kiani M. (2011) ZrOCl 2. 8H 2 O/SiO 2: An efficient and recyclable catalyst for the preparation of coumarin derivatives by Pechmann condensation reaction. Catal. Commun., 14, 62-67.
27. Eskandari K., Karami B., and Khodabakhshi S., (2014) Titanium dioxide nanowires as green and heterogeneous catalysts for the synthesis of novel pyranocoumarins. Catal. Commun. 54, 124-130.
28. Karami, B., Eskandari, K., Farahi, M. and Barmas, A. (2012) An Effective and New Method for the Synthesis of Polysubstituted Imidazoles by the Use of CrCl3. 6H2O as a Green and Reusable Catalyst: Synthasis of Some Novel Imidazole Derivatives. J. Chin. Chem. Soc., 59, 473-479.
29. Karami B., Eskandari K., Gholipour S., and Jamshidi M. (2013) Green synthesis of three substituted methane derivatives by employing ZnO nanoparticles as a powerful and recyclable catalyst. Org. Prep. Proced. Int. 45, 220-226.
30. Kantevari S., Bantu R., and Nagarapu L. (2007) HClO 4–SiO 2 and PPA–SiO 2 catalyzed efficient one-pot Knoevenagel condensation, Michael addition and cyclo-dehydration of dimedone and aldehydes in acetonitrile, aqueous and solvent free conditions: Scope and limitations. J. Mol. Catal. A: Chem., 269, 53-57.
31. Venkatesan K., Pujari S. S., Lahoti R. J., and Srinivasan K. V. (2008) An efficient synthesis of 1, 8-dioxo-octahydro-xanthene derivatives promoted by a room temperature ionic liquid at ambient conditions under ultrasound irradiation. Ultr. Sonochem. Chem., 15, 548-553.
32. Fan X., Hu X., Zhang X., and Wang J. (2005) InCl3? 4H2O-promoted green preparation of xanthenedione derivatives in ionic liquids. Can. J. Chem., 83, 16-20.
33. Zhang Z. H., and Lui Y. (2008) Antimony trichloride/SiO 2 promoted synthesis of 9-ary-3, 4, 5, 6, 7, 9-hexahydroxanthene-1, 8-diones. Catal. Commun., 9, 1715-1719.
34. Kozlov N. G., and Basalaeva L. I. (2005) Vanilline alkanoates in the synthesis of hexahydrobenzacridine and octahydroxanthene derivatives. Russ. J. Chem., 75, 617-621.
35. Horning E. C., and Horing M. G. (1946) Methone derivatives of aldehydes. J. Org. Chem., 11, 95-99.
36. Bekaert A., Andrieux J., and Plat M. (1992) New total synthesis of bikaverin. Tetrahedron Lett., 33, 2805-2806.
37. Niknam K., and Damya M. (2009) 1?Butyl?3?methylimidazolium Hydrogen Sulfate [Bmim] HSO4: An Efficient Reusable Acidic Ionic Liquid for the Synthesis of 1, 8?Dioxo?Octahydroxanthenes. J. Chin. Chem. Soc., 56, 659-665.
38. Karade H. N., Sathe M., and Kaushik M. P. (2007) Synthesis of 4-aryl substituted 3, 4-dihydropyrimidinones using silica-chloride under solvent free conditions. Arkivoc, xiii, 252-258.
39. Das B., Thirupathi P., Mahender I., Reddy V. S., and Rao Y. K. (2006) 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.
40. John A., Yadav P. J. P., and Palaniappan S. (2006) Clean synthesis of 1, 8-dioxo-dodecahydroxanthene derivatives catalyzed by polyaniline-p-toluenesulfonate salt in aqueous media. J. Mol. Catal. A: Chem., 248, 121-125.
41. Tavakoli H. R., Zamani H., Ghorbani M. H., and Etedali-Habibabadi H. (2009) Solvent-free synthesis of 14-aryl (alkyl)-14H-dibenzo [a, j] xanthene, 9-aryl (alkyl)-3, 3, 6, 6-tetramethyl-3, 4, 5, 6, 7, 9-hexahydro-2H-xanthene-1, 8-dione and 2-amino-5, 6, 7, 8-tetrahydro-5-oxo-4-aryl-7, 7-dimethyl-4Hbenzo-[b]-pyran derivatives using InCl 3 as catalyst. Iran. J. Org.Chem., 2, 118-126.
42. Sachar A., Sharma R. L., Kumar S., Kaur D., and Singh J. (2006) Synthesis of novel bis-condensed heterocyclic ring assembly systems. J. Heterocycl. Chem., 43, 1177-1181.
43. Jin T-S., Zhang J-S., Wang A-Q., and Li T-S. (2006) Ultrasound-assisted synthesis of 1, 8-dioxo-octahydroxanthene derivatives catalyzed by p-dodecylbenzenesulfonic acid in aqueous media. Ultr. Sonochem. Chem., 13, 220-224.
44. Kantevari S., Bantu R., and Nagarapu L., (2006) TMSCl mediated highly efficient one-pot synthesis of octahydroquinazolinone and 1, 8-dioxo-octahydroxanthene derivatives. Arkivoc, xvi, 136-148.
45. Bin L. L., Shou J. T., Sha H. L., Meng L., Na Q., L. and Shuang T. (2006) The Reaction of Aromatic Aldehydes and 1,3-Cyclohexanedione in Aqueous Media. E-J. Chem., 3, 117-121.
46. Poor-Heravi M. R. (2009) Selectfluor™ promoted synthesis of 9-aryl-1, 8-dioxooctahydroxanthane derivatives under solvent-free conditions. J. Iran Chem. Soc., 6, 483-488.
2. Qi X., Rice G. T., Lall M. S., Plummer M. S., and White M. C., (2010) Diversification of a B-lactam pharmacophore via allylic C–H amination: accelerating effect of Lewis acid co-catalyst Tetrahedron, 66, 4816-4826.
3. Wedge T. J., and Hawthorne M. F., (2003) Multidentate carborane-containing Lewis acids and their chemistry: mercuracarborands, Coord. Chem. Rev., 240, 111-128.
4. Stone M. T., and Anderson H. L., (2007) A cyclodextrin-insulated anthracene rotaxane with enhanced fluorescence and photostability. Chem. Commun., 126, 2387-2389.
5. (a) Kumar G. G. K. S., and Laali K. K., (2013) Condensation of propargylic alcohols with N-methylcarbazole and carbazole in [bmim] PF 6 ionic liquid; synthesis of novel dipropargylic carbazoles using TfOH or Bi (NO 3) 3· 5H 2 O as catalyst. Tetrahedron Lett., 54, 965-969. (b) Aridoss G., Sarca V. D., Ponder J. F. Jr., Crowe J., and Laali K. K., (2011) Electrophilic chemistry of propargylic alcohols in imidazolium ionic liquids: Propargylation of arenes and synthesis of propargylic ethers catalyzed by metallic triflates [Bi (OTf) 3, Sc (OTf) 3, Yb (OTf) 3], TfOH, or B (C 6 F 5) 3. Org. Biomol. Chem. 9, 2518-2529. (c) Kalkhambkar R. G., and Laali K. K., (2011) Highly efficient synthesis of amides via Ritter chemistry with ionic liquids. Tetrahedron Lett. 52, 5525-5529.
6. (a) Sartori G., Neto J. S. S., Pesarico A. P., Back D. F., Nogueira C. W., and Zeni G. (2013) Bis-vinyl selenides obtained via iron (III) catalyzed addition of PhSeSePh to alkynes: synthesis and antinociceptive activity. Org. Biomol. Chem., 11, 1199-1208. (b) Speranca A., Godoi B., and Zeni G. (2013) Iron (III) chloride/diorganyl diselenides: a tool for intramolecular cyclization of alkynone O-methyloximes. J. Org. Chem. 78, 1630-1637. (c) Stein A. L., Bilheri F. N., Rosario A. R., and Zeni G., (2013) FeCl 3–diorganyl dichalcogenides promoted cyclization of 2-organochalcogen-3-alkynylthiophenes: synthesis of chalcogenophene [2, 3-b] thiophenes. Org. Biomol. Chem., 11, 2972-2978.
7. Kitano M., Nakajima K., Kondo J. N., Hayashi S. and Hara M. (2010) Protonated titanate nanotubes as solid acid catalyst. J. Am. Chem. Soc., 132, 6622-6623.
8. Stefani H. A., and Gatti P. M. (2000) 3, 4-Dihydropyrimidin-2 (1H)-ones: fast synthesis under microwave irradiation in solvent free conditions. Synth. Commun., 30, 2165-2173.
9. Maleki A., Javanshir S., and Sharifi S. (2014) Silica-based sulfonic acid (MCM-41-SO3H): a practical and efficient catalyst for the synthesis of highly substituted quinolines under solvent-free conditions at ambient temperature. Curr. Chem. Lett., 3, 125-132.
10. Havaei M., Karami B., and Khodabakhshi S., (2014) Silica supported yttrium trinitrate: preparation, characterization and application in catalytic Biginelli condensation. Curr. Chem. Lett., 3 167-174
11. Clark J. H., Acc. (2002) Solid acids for green chemistry. Chem. Res., 35, 791-797.
12. El-Brashy A. M., Metwally M. E., and El-Sepai F. A., (2004) Spectrophotometric determination of some fluoroquinolone antibacterials by binary complex formation with xanthene dyes. Il Farmaco, 59, 809-817.
13. (a) Chibale K., Visser M., Schalkwyk D. V., Smith P. J., Saravanamuthu A., and Fairlamb A. H. (2003) Exploring the potential of xanthene deriva- tives as trypanothione reductase inhibitors and chloroquine potentiating agents. Tetrahedron, 59, 2289-2296. (b) Borah R., Dutta P., and Sarma P. (2013) Investigation of efficient synthesis of 1, 8-dioxo-octahydroxanthene derivatives under solvent-free grinding method. Curr. Chem. Lett., 2, 159-166.
14. Bhowmik B. B., and Ganguly P. (2005) Photophysics of xanthene dyes in surfactant solution. Spect. Chim. Acta A, 61, 1997-2003.
15. Ion R. M., Frackowiak D., and Wiktorowicz K. (1998) The incorporation of various porphyrins into blood cells measured via flow cytometry, absorption and emission spectroscopy. Acta Biochim. Pol., 45, 833-845.
16. Knight C. G., and Stephens T. (1989) Xanthene-dye-labelled phosphatidylethanolamines as probes of interfacial pH. Biochem. J., 258, 683-687.
17. Ahmad M. T., King A., Ko D. K., Cha B. H., and Lee J. (2002) Performance and photostability of xanthene and pyrromethene laser dyes in sol-gel phases. J. Phys. D: Appl. Phys., 35, 1473-1476.
18. Saint-Ruf G., Hieu H. T., and Poupelin J. P. (1975) The effect of dibenzoxanthenes on the paralyzing action of zoxazolamine. Naturwissenschaften, 62, 584-590.
19. Kinjo J., Uemura H., Nohara T., Yamashita M., Marubayashi N., and Yoshihira K., (1995) Novel yellow pigment from Pterocarpus santalinus: biogenetic hypothesis for santalin analogs. Tetrahedron Lett., 36, 5599-5602.
20. Casiraghi G., Casnati G., and Cornia M. (1973) Regiospecific reactions of phenol salts: reaction-pathways of alkylphenoxy-magnesiumhalides with triethylorthoformate. Tetrahedron Lett., 14, 679-682.
21. Bekaert A., Andrieux J., and Plat M. (1992) New total synthesis of bikaverin. Tetrahedron Lett., 33, 2805-2806.
22. Knight D. W., and Little P. B., (2001) The first efficient method for the intramolecular trapping of benzynes by phenols: a new approach to xanthenes. J. Chem. Soc. Perkin Trans.1, 14, 1771-1777.
23. Kuo C. W., and Fang J.-M., (2001) Synthesis of xanthenes, indanes, and tetrahydronaphthalenes via intramolecular phenyl–carbonyl coupling reactions. Synth. Commun., 31, 877-892.
24. Jha A., and Beal J., (2004) Convenient synthesis of 12H-benzo [a] xanthenes from 2-tetralone. Tetrahedron Lett., 45, 8999-9001.
25. Seyyedhamzeh M., Mirzaei P., and Bazgir A., (2008) Solvent-free synthesis of aryl-14H-dibenzo [a, j] xanthenes and 1, 8-dioxo-octahydro-xanthenes using silica sulfuric acid as catalyst. Dyes Pigm., 76, 836-839.
26. Karami B., and Kiani M. (2011) ZrOCl 2. 8H 2 O/SiO 2: An efficient and recyclable catalyst for the preparation of coumarin derivatives by Pechmann condensation reaction. Catal. Commun., 14, 62-67.
27. Eskandari K., Karami B., and Khodabakhshi S., (2014) Titanium dioxide nanowires as green and heterogeneous catalysts for the synthesis of novel pyranocoumarins. Catal. Commun. 54, 124-130.
28. Karami, B., Eskandari, K., Farahi, M. and Barmas, A. (2012) An Effective and New Method for the Synthesis of Polysubstituted Imidazoles by the Use of CrCl3. 6H2O as a Green and Reusable Catalyst: Synthasis of Some Novel Imidazole Derivatives. J. Chin. Chem. Soc., 59, 473-479.
29. Karami B., Eskandari K., Gholipour S., and Jamshidi M. (2013) Green synthesis of three substituted methane derivatives by employing ZnO nanoparticles as a powerful and recyclable catalyst. Org. Prep. Proced. Int. 45, 220-226.
30. Kantevari S., Bantu R., and Nagarapu L. (2007) HClO 4–SiO 2 and PPA–SiO 2 catalyzed efficient one-pot Knoevenagel condensation, Michael addition and cyclo-dehydration of dimedone and aldehydes in acetonitrile, aqueous and solvent free conditions: Scope and limitations. J. Mol. Catal. A: Chem., 269, 53-57.
31. Venkatesan K., Pujari S. S., Lahoti R. J., and Srinivasan K. V. (2008) An efficient synthesis of 1, 8-dioxo-octahydro-xanthene derivatives promoted by a room temperature ionic liquid at ambient conditions under ultrasound irradiation. Ultr. Sonochem. Chem., 15, 548-553.
32. Fan X., Hu X., Zhang X., and Wang J. (2005) InCl3? 4H2O-promoted green preparation of xanthenedione derivatives in ionic liquids. Can. J. Chem., 83, 16-20.
33. Zhang Z. H., and Lui Y. (2008) Antimony trichloride/SiO 2 promoted synthesis of 9-ary-3, 4, 5, 6, 7, 9-hexahydroxanthene-1, 8-diones. Catal. Commun., 9, 1715-1719.
34. Kozlov N. G., and Basalaeva L. I. (2005) Vanilline alkanoates in the synthesis of hexahydrobenzacridine and octahydroxanthene derivatives. Russ. J. Chem., 75, 617-621.
35. Horning E. C., and Horing M. G. (1946) Methone derivatives of aldehydes. J. Org. Chem., 11, 95-99.
36. Bekaert A., Andrieux J., and Plat M. (1992) New total synthesis of bikaverin. Tetrahedron Lett., 33, 2805-2806.
37. Niknam K., and Damya M. (2009) 1?Butyl?3?methylimidazolium Hydrogen Sulfate [Bmim] HSO4: An Efficient Reusable Acidic Ionic Liquid for the Synthesis of 1, 8?Dioxo?Octahydroxanthenes. J. Chin. Chem. Soc., 56, 659-665.
38. Karade H. N., Sathe M., and Kaushik M. P. (2007) Synthesis of 4-aryl substituted 3, 4-dihydropyrimidinones using silica-chloride under solvent free conditions. Arkivoc, xiii, 252-258.
39. Das B., Thirupathi P., Mahender I., Reddy V. S., and Rao Y. K. (2006) 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.
40. John A., Yadav P. J. P., and Palaniappan S. (2006) Clean synthesis of 1, 8-dioxo-dodecahydroxanthene derivatives catalyzed by polyaniline-p-toluenesulfonate salt in aqueous media. J. Mol. Catal. A: Chem., 248, 121-125.
41. Tavakoli H. R., Zamani H., Ghorbani M. H., and Etedali-Habibabadi H. (2009) Solvent-free synthesis of 14-aryl (alkyl)-14H-dibenzo [a, j] xanthene, 9-aryl (alkyl)-3, 3, 6, 6-tetramethyl-3, 4, 5, 6, 7, 9-hexahydro-2H-xanthene-1, 8-dione and 2-amino-5, 6, 7, 8-tetrahydro-5-oxo-4-aryl-7, 7-dimethyl-4Hbenzo-[b]-pyran derivatives using InCl 3 as catalyst. Iran. J. Org.Chem., 2, 118-126.
42. Sachar A., Sharma R. L., Kumar S., Kaur D., and Singh J. (2006) Synthesis of novel bis-condensed heterocyclic ring assembly systems. J. Heterocycl. Chem., 43, 1177-1181.
43. Jin T-S., Zhang J-S., Wang A-Q., and Li T-S. (2006) Ultrasound-assisted synthesis of 1, 8-dioxo-octahydroxanthene derivatives catalyzed by p-dodecylbenzenesulfonic acid in aqueous media. Ultr. Sonochem. Chem., 13, 220-224.
44. Kantevari S., Bantu R., and Nagarapu L., (2006) TMSCl mediated highly efficient one-pot synthesis of octahydroquinazolinone and 1, 8-dioxo-octahydroxanthene derivatives. Arkivoc, xvi, 136-148.
45. Bin L. L., Shou J. T., Sha H. L., Meng L., Na Q., L. and Shuang T. (2006) The Reaction of Aromatic Aldehydes and 1,3-Cyclohexanedione in Aqueous Media. E-J. Chem., 3, 117-121.
46. Poor-Heravi M. R. (2009) Selectfluor™ promoted synthesis of 9-aryl-1, 8-dioxooctahydroxanthane derivatives under solvent-free conditions. J. Iran Chem. Soc., 6, 483-488.