1. (a) Behr, L. C.; Fusco, R.; Jarboe, C. H. In Pyrazoles, Pyrazolines, Pyrazolidines, Indazoles and Condensed Rings; Wiley, R. H., Ed.; Interscience: New York, 1967. (b) Elguero, J. In Comprehensive Heterocyclic Chemistry II, Vol. 3; Katritzky, A. R.; Rees, C. W.; Scriven, E. F., Eds.; Pergamon: Oxford, 1996, 1.2. (a) Guillou, S.; Bonhomme, F. J.; Janin, Y. L. Synthesis 2008, 21, 3504-3508. (b) Heller, S. T.; Natarajan, S. R. Org. Lett. 2006, 8, 2675-2678.3. Reddy, A. R.; Sampath, A.; Goverdhan, G.; Yakambaram, B.; Mukkanti, K.; Reddy, P. P. Organic Process Research & Development 2009, 13, 98–101.4. Wang, Z.-X; Qin, H.-L. Green Chem. 2004, 6, 90-92.5. (a) Chen, X.; She, J.; Shang, Z.-C.; Wu, J.; Zhang, P.-Z. Synthesis. 2008, 21, 3478-3486. (b) Polshettiwar, V.; Varma, R. S. Tetrahedron Lett. 2008, 49, 397-400.6. Sreekumar, R.; Padmakumar, R. Synth, Commun. 1998, 28, 1661-1665.7. Texier-Boullet, F.; Klein, B,; Hamelin, J. Synthesis 1986, 406-411.8. Braibante, M. E. F.; Braibante, H. T. S.; Tavares, L. C.; Rohte, S. F.; Costa, C. C.; Morel, A. F.; Stüker, C. Z.; Burrow, R. A. Synthesis 2007, 2485-2490.9. Polshettiwar, V.; Baruwati, B.; Varma, R. S. Chem. Commun., 2009, 1837–1839.10. (a) Wasserscheid, P.; Keim, W. Angew. Chem., Int. Ed., 2000, 39, 3772. (b) Oliver-Bourbigou, H.; Magna, L. J. Mol. Catal. A: Chem. 2002, 182, 419. (c) Zhao, D.; Wu, M.; Kou, Y. and Min, E. Catal. Today, 2002, 74, 157.11. (a) Sheldon, R. Chem. Commun. 2001, 2399. (b) Dupont, J.; de Souza, R. F.; Suarez, P. A. Z. Chem. Rev. 2002, 102, 3667. (c) Xu, D.-Q; Yang, W.-L; Luo, S.-P; Wang, B.-T; Wu, J.; Xu, Z.-Y. Eur. J. Org. Chem. 2007, 1007-1012.12. (a) Zhang, Y.; Liang, J.; Shang, Z.-C. Chin. J. Chem. 2010, 28(2), 259-262. (b) Zhang, Y.; Wang, M.-G.; Liang, J.; Shang, Z.-C. Letters in Organic Chemistry 2010, 7(1), 27-31. |