1. V. M. Karpov, V. E. Platonov, and G. G. Yakobson, Zh. Organ. Khim.,10, 663 (1974).
2. V. M. Karpov, V. E. Platonov, and G. G. Yakobson, Izv. Sibirsk. Otd. Akad. Nauk SSSR, Ser. Khim. Nauk,4, No. 2, 124 (1974).
3. R. N. Sterlin, V. A. Sidorov, and I. L. Knunyants, Izv. Akad. Nauk SSSR, Otd. Khim. Nauk, 62 (1959);
4. J. D. Park, S. L. Hopwood, and J. R. Lacher, J. Org. Chem.,23, 1169 (1958).
5. D. J. Burton and G. C. Briney, J. Org. Chem.,35, 3036 (1970).