1. Weiss, R.G. and Snyder, E.I., J. Chem. Soc. Chem. Commun., 1968, p. 1358.
2. Dagani, M.J., US Patent no. 3624159, 1971; Chem. Abstr., 1972, vol. 76, no. 46304z.
3. Cadogan, J.I.G. and Foster, W.R., J. Chem. Soc., 1961, p. 3071.
4. Clive, D.L.J. and Denyer, C.V., J. Chem. Soc., Chem. Commun., 1972, p. 773.
5. Iranpoor, N., Firouzabadi, H., and Aghapour, G., Synlett., 2001, p. 1176.