1. V. A. Smit and V. F. Kucherov, Usp. Khim.,28, 272 (1959); W. S. Johnson, Angew. Chem. Int. Ed. Eng.,15, 9 (1976); E. E. van Tamelen, Acc. Chem. Res.,8, 152 (1975); J. K. Sutherland, Chem. Soc. Rev.,9, 265 (1980).
2. R. M. Coates, Progress Chem. Org. Nat. Prod.,33, 74 (1976); P. F. Vlad, Izv. Akad. Nauk MSSR, Ser. Biol. Khim. Nauk, 67 (1977); D. E. Cane, Tetrahedron,36, 1109 (1980).
3. H. Grutter, H. R. Vogt, and H. Schinz, Helv. Chim. Acta,37, 1791 (1954); R. H. Bedoukian and J. Wolinsky, J. Org. Chem.,40, 2154 (1975); T. Mandai, K. Mizobouchi, M. Kawada, and J. Otera, J. Org. Chem.,49, 3403 (1984).
4. A. J. Pearson, Austral. J. Chem.,29, 1841 (1976); K. Yoshihara and Y. Hirose, Bull. Chem. Soc. Jpn.,51, 653 (1978); Y. Masaki, K. Hashimoto, K. Sakuma, and K. Kaji, Bull. Chem. Soc. Jpn.,57, 3466 (1984).
5. W. Hoffmann, H. Pasedach, H. Pommer, and W. Reif, Liebigs Ann. Chem.,747, 60 (1971); G. Büchi and W. Pickenhagen, J. Org. Chem.,38, 894 (1973); K. H. Schulte-Elte, H. Strickler, F. Gautschi, et al., Liebigs Ann. Chem., 484 (1975).