Methanesulfonic Acid → 1-(1-Methyl-1h-tetrazol-5-yl)-piperidin-4-amine methanesulphonic acid salt

Participants

Reaction Conditions

Reaction Steps

A mixture of tert-butyl[1-(1-methyl-1H-tetrazol-5-yl)-piperidin-4-yl]-carbamate (39.0 g, 0.138 mol) and methanesulphonic acid (23 mL, 0.354 mol) in isopropanol (290 mL) was stirred at 44° C. over night. The reaction mixture was cooled slowly to 0° C. and stirred for 2 hours. The precipitate was washed with cold isopropanol (2×25 mL) and dried to give 1-(1-methyl-1H-tetrazol-5-yl)-piperidin-4-amine methanesulphonic acid salt as a white powder (35.0 g). 1H NMR (300 MHz, MeOH-d4) ppm 1.75-1.94 (qd, J=12, 3 Hz, 2H) 2.03-2.19 (d, J=12 Hz, 2H) 2.71 (s, 3H), 3.08-3.26 (t, J=13 Hz, 2H) 3.37-3.50 (m, 1H) 3.63-3.87 (d, J=13 Hz, 2H) 3.94 (s, 3H) 4.74-4.90 (d, J=1 Hz, 3H).

Provenance & Evidence