1. For reviews of furan syntheses, see: X. L.Hou, Z.Yang, H. N. C.Wong In Progress in Heterocyclic Chemistry, Vol. 15, G. W. Gribble and T. L. Gilchrist, ed., Pergamon, Oxford, 2003, 167–205
2. Clerodane diterpenoids
3. A. Padwa , M.Ishida, C. L.Muller, S. S.MurphreeJ. Org. Chem.1992, 57, 1170. and references therein
4. M. V. Sargent and F. M.Dean In Comprehensive Heterocyclic Chemistry, Vol. 3, C. W. Bird and G. W. H. Cheeseman, ed., Pergamon Press, Oxford UK, 1984, 599–656
5. F. M. Dean In Advances in Heterocyclic Chemistry, Vol. 31, A. R. Katritzky, ed., Academic Press, New York, 1983, 237–344