1. A. V. Fokin, Yu. N. Studnev, and L. D. Kuznetsova, in: Reactions and Methods of Study of Organic Compounds [in Russian], Book 24, Khimiya, Moscow (1978), pp. 7?466.
2. T. B. Patrick, J. Chem. Educ.,56, 228 (1979).
3. R. H. Hesse and D. H. R. Barton, GFR Pat. No. 2332506 (1974); Chem. Abstr.,80, 132210 (1974).
4. D. H. R. Barton and R. H. Hesse, US Pat. No. 3917688 (1975);
5. Ref. Zh. Khim., 17 0 63 (1976).