Microwave-Assisted One-Pot Synthesis of Spiro[indole-3,4′-pyrano[2,3-c]pyrazoles] Using Polystyrene-Supported p-Toluenesulfonic Acid as Heterogeneous Catalyst under Solvent-Free Conditions

Sundberg, R., The Chemistry of Indoles, New York: Academic, 1996.

Da-Silva, J.F.M., Garden, S.J., and Pinto, A.C., J. Braz. Chem. Soc., 2001, vol. 12, p. 273. https://doi.org/10.1590/S0103-50532001000300002

Kemnitzer, W., Drewe, J., Jiang, S., Zhang, H., Wang, Y., Zhao, J., Jia, S., Herich, J., Labreque, D., Storer, R., Meerovitch, K., Bouffard, D., Rej, R., Denis, R., Blais, C., Lamothe, S., Attardo, G., Gourdeau, H., Tseng, B., Kasibhatla, S., and Cai, S.X., J. Med. Chem., 2004, vol. 47, p. 6299. https://doi.org/10.1021/jm049640t

Al-Haiza, M.A., Mostafa, M.S., and El-Kady, M.Y., Molecules, 2003, vol. 8, p. 275. https://doi.org/10.3390/80200275

Wiener, C., Schroeder, C.H., West, B.D., and Link, K.P., J. Org. Chem., 1962, vol. 27, p. 3086. https://doi.org/10.1021/jo01056a024

Marco, J.L., Rios, C., Garcia, A.G., Villarroya, M., Carreiras, M.C., Martins, C., Eleuterio, A., Morreale, A., Orozcoe, M., and Luqued, F., J. Bioorg. Med. Chem., 2004, vol. 12, p. 2199. https://doi.org/10.1016/j.bmc.2004.02.017

Kang, T.H., Matsumoto, K., Murakami, Y., Taka­yama, H., Kitajima, M., Aimi, N., and Watanabe, H., Eur. J. Pharmacol., 2002, vol. 444. https://doi.org/10.1016/S0014-2999(02)01608-4

Cui, C.B., Kakeya, H., and Osada, H., Tetrahedron, 1996, vol. 52, p. 12651. https://doi.org/10.1016/0040-4020(96)00737-5

Leclercq, J., de Pauw-Gillet, M.C., Bassleer, R., and Angenot, L., J. Ethnopharmacol,, 1986, vol. 15, p. 305. https://doi.org/10.1016/0378-8741(86)90169-8

Joshi, K.C., Jain, R., and Sharma, K., J. Indian Chem. Soc., 1988, vol. 65, p. 202.

Joshi, K.C., Jain, R., and Arora, S., J. Indian Chem. Soc., 1988, vol. 65, p. 277.

Abdel-Rahman, A.H., Keshk, E.M., Hanna, M.A., and El-Bady, Sh.M., Bioorg. Med. Chem., 2004, vol. 12, p. 2483. https://doi.org/10.1016/j.bmc.2003.10.063

Mulwad, V.V. and Patil, C.A., Indian J. Chem., Sec. B, 2005, vol. 44, p. 2355.

Higashiyama, K. and Otomasu, H., Chem. Pharm. Bull., 1980, vol. 28, p. 648. https://doi.org/10.1248/cpb.28.648

Safaei, H.R., Shekouhy, M., Shirinfeshan, A., and Rahmanpur, S., Mol. Diversity, 2012, vol. 16, p. 669. https://doi.org/10.1007/s11030-012-9392-z

Rao, B.M., Reddy, G.N., Reddy, T.V., Prabhavathi Devi, B.L.A., Prasad, R.B.N., Yadav, J.S., and Reddy, B.V.S., Tetrahedron Lett., 2013, vol. 54, p. 2466. https://doi.org/10.1016/j.tetlet.2013.02.089

Elinson, M.N., Alexey, I., Ilovaisky, V.M. Merkulova, T., Zaimovskay, A., and Nikishina, G.I., Mendeleev Commun., 2012, vol. 22, p. 143. https://doi.org/10.1016/j.mencom.2012.05.010

Keyume, J.F. and Sali, A.A., Tetrahedron, 2014, vol. 70, p. 484. https://doi.org/10.1016/j.tet.2013.11.019

Khazaei, A.M., Zolfigol, A., Karimitabar, F., Nikokar, I., and Moosavi-Zare, A.R., RSC Adv., 2015, vol. 5, p. 71402. https://doi.org/10.1039/C5RA10730J

Mandha, S.R., Siliveri, S., Alla, M., Bommineni, M.R., and Balasubramanian, S., Bioorg. Med. Chem. Lett., 2012, vol. 22, p. 5272. https://doi.org/10.1016/j.bmcl.2012.06.055

Elinson, M.N. and Dorofeev, A.S., Mol. Diversity, 2008, vol. 13, p. 47. https://doi.org/10.1007/s11030-008-9100-1

Atta, A.H., J. Chin. Chem. Soc., 2006, vol. 53, p. 663. https://doi.org/10.1002/jccs.200600087

Safaei, H.R., Shekouhy, M., Rahmanpur, S., and Shirinfeshan, A., Green Chem., 2012, vol. 14, p. 1696. https://doi.org/10.1039/c2gc35135h

Zhao, L., Zhou, B., and Li, Y., Heteroat. Chem., 2011, vol. 22, p. 673. https://doi.org/10.1002/hc.20723

Li, C.-B., Huang, L.-S., Wu, R.-S., and Xu, D.-Z., ChemistrySelect, 2019, vol. 4, p. 1635. https://doi.org/10.1002/slct.201803905

Riyaz, S., Indrasena, A., Naidu, A., and Dubey, P.K., Indian J. Chem., Sect. B, 2014, vol. 53, p. 1442.

Padvi, S.A., Tayade, Y.A., Wagh, Y.B., and Dalal, D.S., Chin. Chem. Lett., 2016, vol. 27, p. 714. https://doi.org/10.1016/j.cclet.2016.01.016

Kidwai, M., Jain, A., and Bhardwaj, S., Mol. Diversity, 2012, vol. 16, p. 121. https://doi.org/10.1007/s11030-011-9336-z

Dandia, A., Parewa, V., Jaina, A.K., and Rathore, K.S., Green Chem., 2011, vol. 135, p. 2135. https://doi.org/10.1039/c1gc15244k

Li, Y., Chen, H., Shi, C., Shi, D., and Ji, S., J. Comb. Chem., 2010, vol. 12, p. 231. https://doi.org/10.1021/cc9001185

Nagaraju, S., Paplala, B., Sathish, K., Santana, G., and Kashinatha, D., Tetrahedron Lett., 2017, vol. 58, p. 4200. https://doi.org/10.1016/j.tetlet.2017.09.060

Khalafi-Nezhad, A., Shahidzadeh, E.S., Sarikhani, S., and Panahi, F., J. Mol. Catal. A: Chem., 2013, vol. 379, p. 1. https://doi.org/10.1016/j.molcata.2013.07.009

Liu, Y., Ren, Z., Cao, W., Deng, J.C.H., and Shao, M., Synth. Commun., 2011, vol. 41, p. 3620. https://doi.org/10.1080/00397911.2010.519449

Jamatia, R., Gupta, A., and Pal, A.K., RSC. Adv., 2016, vol. 6, p. 20994. https://doi.org/10.1039/C5RA27552K

Satasia, S.P., Kalaria, P.N., Avalani, J.R., and Raval, D.K., Tetrahedron, 2014, vol. 70, p. 5763. https://doi.org/10.1016/j.tet.2014.06.050

Moosavi-Zare, A.R., Zolfigol, M.A., Noroozizadeh, E., Zarei, M., Karamian, R., and Asadbegy, M., J. Mol. Catal. A: Chem., 2016, vol. 425, p. 217. https://doi.org/10.1016/j.molcata.2016.10.011

Devi, J., Kalita, S.J., and Deka, D.C., ChemistrySelect, 2018, vol. 3, p. 1512. https://doi.org/10.1002/slct.201702716

Sadeghi, B., Ghasemi Pirbaluti, M., Nezhad, P.F, and Nezhad, R.A., Res. Chem. Intermed., 2015, vol. 41, p. 4047. https://doi.org/10.1007/s11164-013-1509-1

Ghasemzadeh, M.A., Mirhosseini-Eshkevari, B., and Abdollahi-Basir, M.H., BMC Chem., 2019, vol. 13, article no. 119. https://doi.org/10.1186/s13065-019-0636-1

Maleki, B., Nasiri, N., Tayebee, R., Khojastehne­zhad, A., and Akhlaghia, H.A., RSC Adv., 2016, vol. 6, p. 79128. https://doi.org/10.1039/C6RA15800E

Rai, P., Srivastava, M., and Singh, J., New J. Chem., 2014, vol. 38, p. 3181. https://doi.org/10.1039/C3NJ01545A

Guo, R.Y., An, Z.M., and Mo, L.P., Tetrahedron, 2013, vol. 69, p. 9931. https://doi.org/10.1016/j.tet.2013.09.082

Zou, Y., Hu, Y., and Liu, H., ACS Comb. Sci., 2012, vol. 14, p. 3843. https://doi.org/10.1021/co200128k

Manoj Kumar, V., Suryakumari, A., and Sudhakar, C., Synth. Commun., 2021, vol. 51, p. 913. https://doi.org/10.1080/00397911.2020.1858109

Sudhakar, C., Reddy, P.R., Ganesh Kumar, C., Sujitha, P., and Das, B., Eur. J. Org. Chem., 2012, vol. 2012, p. 1253. https://doi.org/10.1002/ejoc.201101601

Manoj Kumar, V., Sudhakar, C., Suryakumari, A., and Shekhar, V., Synth. Commun., 2022, vol. 52, p. 250. https://doi.org/10.1080/00397911.2021.2017459

Laxmi Kumari, N., Sudhakar, C.H., and Radha, K., Tetrahedron Lett., 2023, vol. 125, article ID 154627. https://doi.org/10.1016/j.tetlet.2023.154627