1. Levkovskaya, G.G., Drozdova, T.I., Rozentsveig, I.B., and Mirskova, A.N., Usp. Khim., 1999, vol. 68, p. 638.
2. Evstaf’eva, I.T., Bozhenkov, G.V., Aizina, Yu.A., Rozentsveig, I.B., Ermakova, T.G., Levkovskaya, G.G., and Mirskova, A.H., Zh. Org. Khim., 2002, vol. 38, p. 1230.
3. Rozentsveig, I.B., Levkovskaya, G.G., Kondrashov, E.V., Evstaf’eva, I.T., and Mirskova, A.H., Zh. Org. Khim., 2001, vol. 37, p. 1635.
4. Sicker, D., Behlmann, W., Bender, D., and Mann, G., Synthesis, 1987, p. 493.
5. Levkovskaya, G.G., Bozhenkov, G.V., Larina, L.I., and Mirskova, A.N., Zh. Org. Khim., 2002, vol. 38, p. 1554.