3990
G. Rai et al. / Tetrahedron Letters 46 (2005) 3987–3990
2. For some recent reports see: (a) Zhang, C.; Wang, Y.;
Int. Ed. 2000, 39, 3772; (c) Sheldon, R. A. Chem. Commun.
2001, 2399; (d) Zhao, H.; Malhotra, S. V. Aldrichim. Acta
2002, 35(3), 75.
Wang, J. Y. J. Chin. Chem. Soc. 2004, 51(3), 569; (b)
Mohapatra, S. K.; Sonavane, S. U.; Jayaram, R. V.;
Selvam, P. Appl. Catal. B 2003, 46(1), 155; (c) Lei, W.;
Pinhua, L.; Zongtao, W.; Jincan, Y.; Min, W.; Yanbin, D.
Synthesis 2003, 2001; (d) Mohapatra, S. K.; Sonavane, S.
U.; Jayaram, R. V.; Selvam, P. Org. Lett. 2002, 4(24),
4297; (e) Vass, A.; Dudas, J.; Toth, J.; Varma, R. S.
Tetrahedron Lett. 2001, 42(32), 5347; (f) Pitts, M. R.;
Harrison, J. R.; Moody, C. J. J. Chem. Soc., Perkin Trans.
1 2001, 955, and references cited therein; (g) Tsukinoki, T.;
Tsuzuki, H. Green Chem. 2001, 3(1), 37; (h) Yu, C.; Liu,
B.; Hu, L. J. Org. Chem. 2001, 66(3), 919; (i) Yasuhara,
A.; Kasano, A.; Sakamoto, T. J. Org. Chem. 1999, 64(7),
2301, and references therein; (j) Moody, C. J.; Pitts, M. R.
Synlett 1998, 1028.
6. (a) Kragl, U.; Eckstein, M.; Kaftzik, N. Curr. Opin.
Biotechnol. 2002, 13, 565; (b) Lee, J. K.; Kim, M. J. J. Org.
Chem. 2002, 67(19), 6845.
7. Huddleston, J. G.; Willauer, H. D.; Swatloski, R. P.;
Visser, A. E.; Rogers, R. D. Chem. Commun. 1998,
1765.
8. (a) Srinivas, K. A.; Kumar, A.; Chauhan, S. M. S. Chem.
Commun. 2002, 2456; (b) Waffenschimidt, H.; Wassersc-
heid, P. J. Mol. Catal. A 2000, 164, 61 .
9. (a) Kim, D. W.; Song, C. E.; Chi, D. Y. J. Am. Chem. Soc.
2002, 124, 10278; (b) Kim, H. W.; Jeong, J. M.; Lee, Y.-S.;
Chi, D. Y.; Chung, K.-H.; Lee, D. S.; Chung, J.-K.; Lee,
M. C. Appl. Radiat. Isot. 2004, 61, 1242.
3. (a) Sheldon, R. A. Chem. Commun. 2001, 2399; (b)
Dupont, J.; de Souza, R. F.; Suarez, P. A. Z. Chem.
Rev. 2002, 102, 3667.
4. For some recent examples see: (a) Gordon, C. M. Appl.
Catal. A 2001, 222, 101; (b) Zhao, G.; Jiang, T.; Gao, H.;
Han, B.; Huang, J.; Sun, D. Green Chem. 2004, 75; (c)
Hasegawa, M.; Ishii, H.; Fuchigami, T. Green Chem. 2003,
512; (d) Qiao, K.; Deng, Y. New J. Chem. 2002, 667; (e)
Aggarwal, V. K.; Emme, I.; Mereu, A. Chem. Commun.
10. Khan, F. A.; Dash, J.; Sudheer, C.; Gupta, R. K.
Tetrahedron Lett. 2003, 44, 7783.
11. Zheng, X. L.; Zhang, Y. M. Chin. J. Chem. 2002, 20,
925.
12. (a) Bellamy, F. D.; Ou, K. Tetrahedron Lett. 1984, 25(8),
839; (b) Satoh, T. Ventron Alembic 1978, 14, 3.
13. (a) Suslick, K. S.; Hammerton, D. A.; Cline, R. J. Am.
Chem. Soc. 1986, 108, 5641; (b) Mason, T. Chem. Soc.
Rev. 1997, 26, 443; For some recent examples see (c)
Lepore, S. D.; He, Y. J. Org. Chem. 2003, 68(21), 8261; (d)
Yadav, J. S.; Reddy, B. V. S.; Reddy, K. B.; Raj, K. S.;
Prasad, A. R. J. Chem. Soc., Perkin Trans. 1 2001, 1939;
(e) Streiff, S.; Ribeiro, N.; Desaubry, L. Chem. Commun.
2004, 346; (f) Ranu, B. C.; Das, A. Tetrahedron Lett. 2004,
45, 6875.
´
2002, 1612; (f) Boulaire, V. L.; Gree, R. Chem. Commun.
2000, 2195; (g) Smietana, M.; Mioskowski, C. Org. Lett.
2001, 3(7), 1037; (h) Kumar, A.; Pawar, S. S. J. Org.
Chem. 2004, 69(4), 19.
5. For recent reviews, see: (a) Welton, T. Chem. Rev. 1999,
99, 2071; (b) Wasserscheid, P.; Keim, W. Angew. Chem.