1. (a) In Biochemical Aspects of Fluorine Chemistry; Filler, R.; Kobayashi, Y., Eds.; Elsevier Biomedical Press and Kodansha Ltd: Tokyo, 1982.
2. (b) Welch, J. T. Tetrahedron 1987, 43, 3123.
3. (c) In Selective Fluorination in Organic and Bioorganic Chemistry; Welch, J. T., Ed.; ACS Symposium Series, 1991; No. 456.
4. (a) Sun, W. C.; Ng, C. S.; Prestwich, G. D. J. Org. Chem. 1992, 57, 132 and references cited therein.
5. (b) Masnyk, M.; Fried, J.; Roelofs, W. Tetrahedron Lett. 1989, 30, 3243.