1. For reviews, see: (a) Lewis Acids in Organic Synthesis; Yamamoto, H., Ed.; Wiley-VCH: Weinheim, 2000; Vols. 1–2; (b) Lewis Acid Reagents; Yamamoto, H., Ed.; Oxford University Press: New York, 1999; (c) Mahrwald, R. Chem. Rev.1999, 99, 1095–1120; (d) Santelli, M.; Pons, J. M. Lewis Acids and Selectivity in Organic Synthesis; CRC Press: Boca Raton, 1996; (e) Shambayati, S.; Schreiber, S. L. In Comprehensive Organic Synthesis; Trost, B. M.; Fleming, I., Eds.; Pergamon Press: Oxford, 1991; Vol. 1, pp. 283–324; (f) Yamaguchi, M. In Comprehensive Organic Synthesis; Trost, B. M.; Fleming, I., Eds.; Pergamon Press: Oxford, 1991; Vol. 1, pp. 325–353.
2. For reviews, see: (a) Lewis Acids in Organic Synthesis; Yamamoto, H., Ed.; Wiley-VCH: Weinheim, 2000; Vols. 1–2; (b) Lewis Acid Reagents; Yamamoto, H., Ed.; Oxford University Press: New York, 1999; (c) Mahrwald, R. Chem. Rev.1999, 99, 1095–1120; (d) Santelli, M.; Pons, J. M. Lewis Acids and Selectivity in Organic Synthesis; CRC Press: Boca Raton, 1996; (e) Shambayati, S.; Schreiber, S. L. In Comprehensive Organic Synthesis; Trost, B. M.; Fleming, I., Eds.; Pergamon Press: Oxford, 1991; Vol. 1, pp. 283–324; (f) Yamaguchi, M. In Comprehensive Organic Synthesis; Trost, B. M.; Fleming, I., Eds.; Pergamon Press: Oxford, 1991; Vol. 1, pp. 325–353.
3. (c) Mahrwald, R. Chem. Rev.1999, 99, 1095–1120;
4. (d) Santelli, M.; Pons, J. M. Lewis Acids and Selectivity in Organic Synthesis; CRC Press: Boca Raton, 1996;
5. (e) Shambayati, S.; Schreiber, S. L. In Comprehensive Organic Synthesis; Trost, B. M.; Fleming, I., Eds.; Pergamon Press: Oxford, 1991; Vol. 1, pp. 283–324;