Hydrochloric Acid → 1-(6-Chloropyridazin-3-yl)piperidin-4-amine

Participants

Reaction Steps

[1-(6-Chloro-pyridazin-3-yl)-piperidin-4-yl]-carbamic acid tert-butyl ester (0.59 g 1.89 mmol) was dissolved in THF:MeOH 2:1 (45 ml) and HCl in 1,4-dioxan (4M, 3.8 ml, 7.56 mmol) was added. The reaction was stirred at rt for 3 h and then at 60° C. for 2 h. The solvent was evaporated to yield the title compound (0.49 g, 100%) as the hydrochloric salt. 1H-NMR (CD3OD, 500 MHz): δ 8.10 (d, 1H), 7.92 (d, 1H), 4.41-4.35 (m 2H), 3.67-3.57 (m, 1H), 3.55-3.46 (m, 2H), 2.32-2.24 (m, 2H), 1.96-1.83 (m, 2H).

Provenance & Evidence