1. Stobbe, H. Ber. Dtsch. Chem. Ges. 1893, 26, 2312.
2. E1-Rayyes, N. R.; Al-Salman, Mrs. N. A. J. Heterocycl. Chem. 1976, 13, 285.
3. Baghos, V. B.; Nasr, F. H.; Gindy, M. Hely. Chim. Acta
1979, 62, 90.
4. Baghos, V. B.; Doss, S. H.; Eskander, E. F. Org. Prep. Proced. Int. 1993, 25, 301.
5. Moldvai, I.; Temesvari-Major, E.; Balazs, M.; Gacs-Baitz, E.; Egyed, O.; Szantay, C. J. Chem. Res., (S)
1999, 3018.