1. T.W. Green, P.G.M. Wuts, Protective Groups in Organic Synthsis, John Wiley & Sons, Inc., New York, 1991.
2. K.I. Oyama, T. Kondo, Org. Lett. 5 (2003) 209.
3. P. Salehi, M.M. Khodaei, M. Goodarzi, Russ. J. Org. Chem. 38 (2002) 1671.
4. J.I. Yoshida, K. Itami, Chem. Rev. 102 (2002) 3693.
5. A. Corma, Curr. Opin. Solid State Mat. Sci. 2 (1997) 63.