1. Stereoselective Synthesis (Houben-Weyl); Helmchen, G.; Hoffmann, R. W.; Mulzer, J.; Schaumann, E., Eds.; Thieme: Stuttgart, 1996; Vols. 1–10.
2. For a review on enantioselective reactions promoted by titanium derivatives, see: Ramón, D. J.; Yus, M. Recent Res. Devel. Org. Chem. 1998, 2, 489–523.
3. For recent examples, see: (a) Seebach, D.; Beck, A. K. Chimia 1997, 51, 293–297.
4. (b) Shao, M.-Y.; Gau, H.-M. Organometallics 1998, 17, 4822–4827.
5. (c) Pagenkopf, B. L.; Carreira, E. M. Tetrahedron Lett. 1998, 39, 9593–9596.