1. Part 15 in the series of synthetic studies on [4+3] cycloadditions of oxyallyls. See also: (a) Part 14: Lee, K.; Cha, J. K. J. Am. Chem. Soc. 2001, 123, 5590; (b) Part 13: Lee, J. C.; Cha, J. K. J. Am. Chem. Soc. 2001, 123, 3243; (c) Part 12: Lee, J. C.; Cha, J. K. Tetrahedron 2000, 56, 10175; (d) Part 11: Sung, M. J.; Lee, H. I.; Chong, Y.; Cha, J. K. Org. Lett. 1999, 1, 2017.
2. For general reviews, see: (a) Petasis, N. A.; Patane, M. A. Tetrahedron 1992, 48, 5757;
3. (b) Roxburgh, C. J. Tetrahedron 1993, 49, 10749;
4. (c) Mehta, G.; Singh, V. Chem. Rev. 1999, 99, 881.
5. For previous work, see: (a) Oh, J.; Choi, J.-R.; Cha, J. K. J. Org. Chem. 1992, 57, 6664;