1. For part XI, cf.: Mahran M. R., Abdou W. M., Abd El-Rahman N. M., Sidky M. M. (in press) Phosphorus and Sulfur
2. Kukhtin V. A. (1958) Dokl. Akad. Nauk SSSR121: 466; (1959) Chem. Abstr.53: 1105; Kukhtin V. A., Orekhova J. (1960) Zh. Obshch. Khim.30: 1208; (1960) Chem. Abstr.55: 358; Ramirez F., Desai N. B. (1963) J. Am. Chem. Soc.85: 3252
3. Kukhtin V. A., Kirillova K. M., Shagidullin R. R. (1962) Zh. Obshch. Khim.32: 649; (1963) Chem. Abstr.58: 546; Ogata Y., Yamashita M. (1970) J. Am. Chem. Soc.92: 4670
4. Ramirez F., Patwardhan A. V., Smith C. P. (1966) J. Org. Chem.31: 474; Ramirez F., Mitra R. B., Desai N. B. (1965) J. Am. Chem. Soc.82: 2651
5. Finar I. L. (1973) Organic Chemistry, Vol. 1: The Fundamental Principles, 6th edn. Longman, London, p. 850