1. Sum, V.; Kee, T. P., J. Chem. Soc., Perkin Trans. 1, 1993, 2701.
2. Patel, D. V.; Rielly-Gauvin, K.; Ryono, D. E., Tetrahedron Lett., 1990, 31, 5587.
3. Stowasser, B.; Budt, K.-H.; Jian-Qi, L.; Peyman, A.; Ruppert, D., Tetrahedron Lett., 1992, 33, 6625.
4. Spangler, L. A.; Mikołajczyk, M.; Burdge, E. L.; Kiełbasiński, P.; Smith, H. C.; Łyżwa, P.; Fisher, J. D.; Omelańczuk, J., J. Agr. Food Chem., in press.
5. For recent reviews see: Mikołajczyk, M.; Drabowicz, J.; Kiełbasiński, P. In Methods of Organic Chemistry, Houben–Weyl; Helmchen, G.; Hoffmann, R. W.; Mulzer, J.; Schaumann, E., Eds; G. Thieme Verlag: Stuttgart, 1995; Vol. 21e, pp. 5701–5731. Kolodiazhnyi, O. I., Tetrahedron: Asymmetry, 1998, 9, 1279.