General Papers ARKIVOC 2006 (xvi) 43-48 Table 2. Ionic liquid EAN recovered in flavones 2a–h synthesis Yield (%) Entry 1,3-Diketone Product Time (sec.) Cycle 1 Recycle 1 Recycle 2 1. 1a 2a 50 93 91 91 2. 1b 2b 45 90 88 88 Acknowledgements The authors are thankful to the Principal P. L. More, Dnyanopasak College, Parbhani, for encouragement during the process of carrying out this work. References 1. Welton, A. F.; Tobias, L. D.; Fiedler-Nagy, C.; Anderson, W.; Hope, W.; Middleton, K.; Harbirne, J. B.; A. R. Liss, New York, 1986, 231. 2. Havsteen, Biochem. Pharmacol. 1983, 32, 1141. 3. Banerji, A.; Goomer, N. Synthesis 1980, 874. 4. Hoshino, Y.; Oohinata, T.; Takeno, N. Bull. Chem. Soc. Jpn. 1986, 59, 2351. 5. LeFloch’h, Y.; LeFeuvre, M. Tetrahedron Lett. 1986, 27, 2751. 6. (a) Balogh, M.; Laszlo, P. Organic Chemistry using Clays, Springer: Berlin, 1993. (b) Chisen, J.; Chisen, I. C.; Rafelt, J. S.; Macquarrie, D. J.; Clark, J. H. Chem. Commun. 1997, 2203. 7. Hoshino, Y.; Takino, N. Bull. Chem. Soc. Jpn. 1987, 60, 1919. 8. Nishinaga, A.; Ando, H.; Maruyama, K.; Mashino, T. Synthesis 1982, 839. 9. Zubaidha, P. K.; Hashmi, A. M.; Bhosale, R. S. Heterocyclic Commun. 2005, 11, 9100. 10. Garg, S.; Ishar, M. P. S.; Sarin, R.; Gandhi, R. P. Indian J. Chem. Soc. 1994, 33B, 1123. 11. Jung, J. C.; Min, J. P.; Park, O. S. Synth. Commun. 2001, 31, 1837. 12. Verma, R. S.; Saini, R. K.; Kumar, D. J. Chem. Res. (S), 1998, 348. 13. Kumar, P. E.; Prashad, K. J. R. Indian J. Chem. 1999, 38B, 1277. 14. Tsukayama, M.; Kawamura, Y.; Ishizuka, T.; Hayas, S.; Torii, F. Heterocycles, 2003, 60, 2775. 15. (a) Varma, R. S.; Varma, M.; Chatterjee, A. K. J. Chem. Soc., Perkin Trans. 1 1993, 999. (b) Varma, R. S.; Chatterjee, A. K.; Varma, M. Tetrahedron Lett. 1993, 34, 3207. (c) Varma, R. S.; Lamture, J. B.; Varma, M. Tetrahedron Lett. 1993, 34, 3029. (d) Varma, R. S.; Chatterjee, A. K.; Varma, M. Tetrahedron Lett. 1993, 34, 4603. ISSN 1424-6376 Page 47 ©ARKAT
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