1. (a) The enantiopure drug market has been estimated as US $18 billion worldwide. See: Stinson, S. C. Chem. Eng. News 1992, Sept. 28, 46–78;
2. (b) Sheldon, R. A., Chirotechnology, Marcel Dekker: New York, 1993;
3. (c) Collins, A. N.; Sheldrake, G. N.; Crosby, J., Eds, Chirality in Industry, Wiley: Chichester, Vol. I, 1992; Vol. II, 1997.
4. Schoffers, E.; Golebiowski, A.; Johnson, C. R. Tetrahedron 1996, 52, 3769–3826.
5. Kagan, H. B.; Fiaud, J. C. Top. Stereochem. 1988, 18, 249–330.