1. Hoffmann, H. M. R.; Plessner, T.; von Riesen, C. Synlett 1996, 690.
2. QCI stands for quin-cor(e)-ine, QCD for quin-cor(e)-idine. In German the syllable cor stands for `C ohne Rest' (carbon without residual group) analogous to nor (N ohne Rest; e.g. adrenaline and noradrenaline).
3. Available from Buchler GmbH, Harxbütteler Str. 3, D-38110 Braunschweig, Germany (fax: +49 (0) 5307-93131) and from Aldrich-Fluka.
4. For studies on the related 2-hydroxymethyl quinuclidine system see: Prelog, V.; Cerkovnikov, E. Liebigs Annalen 1940, 545, 259–262.
5. Eggert, U.; Hoffmann, H. M. R., unpublished.