| References: 1. Fraser-Reid B, et al., J. Am. Chem. Soc. 1984, 106, p731
2. Edwards MP, et al., J. Org. Chem. 1984, 49, p3503
3. Kelly AG, Roberts JS, J. Chem. Soc. Comm. 1980, p228
4. Ogawa T, Carbohydr. Res. 1977, 57, pC31
5. Isobe M, et al., Tetrahedron Lett. 1987, 28, p6485 |