[1] Zhang D., Wang G., Zhu R., Tetrahedron: Asymmetry, 2008, 19, 568

[2] Singh R., Goswami T., Journal of Physical Organic Chemistry, 2008, 21, 225

[3] Wang C. J., Zhang Z. H., Dong X. Q., et al., Chemical Com-      munications, 2008, 1431 

[4] Xu L. W., Yang M. S., Qiu H. Y., et al., Synthetic Communications, 2008, 38, 1011

[5] Miao T., Wang L., Tetrahedron Letters, 2008, 49, 2173

[6] Wang Y., Li P., Liang X., et al., Chemical Communications, 2008, 1232

[7] Bhanushali M. J., Nandurkar N. S., Jagtap S. R., et al., Catalysis Communications, 2008, 9, 1189

[8] Shirakawa S., Shimizu S., Synlett., 2007, 3160

[9] Zhu S., Yu S., Ma D., Angewandte Chemie, International Edition, 2008, 47, 545

[10] Chen F. X., Shao C., Wang Q., et al., Tetrahedron Letters, 2008, 49, 1282

[11] Ni B., Zhang Q., Headley A. D., Tetrahedron Letters, 2008, 49, 1249

[12] Azim Z. H., Saidi M. R., Tetrahedron Letters, 2008, 49, 1244

[13] Li X., Cun L., Lian C., et al., Organic & Biomolecular Chemistry, 2008, 6, 349

[14] Attanasi O. A., Favi G., Filippone P., et al., Synlett., 2007, 2971

[15] Micheletti G., Pollicino S., Ricci A., et al., Synlett., 2007, 2829

[16] Esteban J., Costa A. M., Gomez A., et al., Organic Letters, 2008, 10, 65

[17] Bi X., Zhang J., Liu Q., et al., Advanced Synthesis & Catalysis, 2007, 349, 2301

[18] Chen F. X., Shao C., Wang Q., et al., Tetrahedron Letters, 2007, 48, 8456

[19] Luo S., Zhang L., Mi X., et al., Journal of Organic Chemistry, 2007, 72, 9350

[20] Fustero S., Chiva G., Piera J., et al., Chemistry―A European Journal, 2007, 13, 8530

[21] Deb I., John S., Namboothiri I. N. N., Tetrahedron, 2007, 63, 11991

[22] Sharma Y. O., Degani M. S., Journal of Molecular Catalysis A: Chemical, 2007, 277, 215

[23] Xu D. Q., Luo S. P., Wang Y. F., et al., Chemical Communications, 2007, 4393

[24] Veldurthy B., Clacens J. M., Figueras F., Adv. Synth. Catal., 2005, 347, 767