1. T.J. Simpson, in: R.H. Thomson (Ed.), The Chemistry of Natural Products, Blackie, London, 1985
2. F.M. Dean, in: J. Apsimon (Ed.), The Total Synthesis of Natural Products, Wiley, New York, vol. 1 (1973) 513.
3. A.R. Katritzky, Y. Ji, Y. Fang, I. Prakash, J. Org. Chem. 66 (2001) 5613
4. K.K. Park, H. Seo, J.-G. Kim, I.-H. Suh, Tetrahedron Lett. 41 (2000) 1393
5. K.C. Nicolaou, S.A. Snyder, A. Bigot, J.A. Pfefferkon, Angew. Chem. Int. Ed. 39 (2000) 1093