1. Chernov, S.V., Shul’ts, E.E., Shakirov, M.M., and Tolstikov, G.A., Zh. Org. Khim., 2005, vol. 41, p. 535.
2. Tietze, L.F., Bell, P.H., and Chandrasekhar, S., Angew. Chem., 2003, vol. 115, p. 4128.
3. Nakamura, H., Wu, H., Ohizumi, Y., Hirata, Y., Tetrahedron, Lett., 1984, vol. 25, p. 2989.
4. Kharitonov, Yu.V., Shul’ts, E.E., Shakirov, M.M., and Tolstikov, G.A., Zh. Org. Khim., 2003, vol. 39, p. 67.
5. Kharitonov, Yu. V., Shul’ts, E. E., Shakirov, M.M., and Tolstikov, G.A., Zh. Org. Khim., 2005, vol. 41, p. 1145.