3.1.1. (1*S*,2*R*,4*R*)-1-[(Dimethylamino)methyl]-7,7-dimethylbicyclo[2.2.1]heptan-2-amine (**2a**)

Elutes first from the column. Yield: 175 mg (0.89 mmol, 12%) of colorless oil. 1H-NMR (500 MHz, CDCl3): δ 0.79 (s, 3H), 1.05 (s, 3H), 1.06–1.13 (m, 1H), 1.34 (ddd, *J* = 12.8, 9.4, 3.9, 1H), 1.54–1.61 (m, 3H), 1.63 (t, *J* = 4.3, 1H), 1.64–1.75 (m, 2H), 1.93 (d, *J* = 11.4, 1H), 2.02 (d, *J* = 13.0, 1H), 2.27 (s, 6H), 2.74 (d, *J* = 13.0, 1H), 3.11 (dd, *J* = 8.7, 5.1, 1H).
