Ezquerra J. et al., J. Org. Chem., 1995, 60, 2925. |
Moody C. M. et al., Tetrahedron Lett., 1993, 34, 4667. |
Escribano A. et al., Bioorg. and Med. Chem. Lett., 1998, 8, 765. |
Baldwin J. E. et al., J. Chem. Soc., Chem. Commun. 1987, 153. |
Kasai T. et al., Agric. Biol. Chem. 1984, 48(9) , 2271. |
Ouerfelli O. et al., Synlett, 1993, 409. |
Panday, S. K. et al., Tetrahedron Lett. 1994, 35, 6673. |
Hon Y. et al., Heterocycles 1990, 31, 191. |
Todeschi, N., et al., Journal of the Chemical Society, Perkin Transactions 2, 1996, 1337-1351. |
Chemical Abstracts, vol. 90, No. 23, Jun. 4, 1979, abstract No. 187333j. |