... 20 1 1 3d [ ]Cu-BF 12d 65*' > 15 :1 O 3 3e [ ] Cu~B1=3 12e 649 >10: 1 O ... These reactions illustrate the general applica- bility of this method for the stereoselective synthesis of 2,6-disubstituted piperidines. ... Di- hydropinidine (15), which earlier had been synthesized by diilerent ...