Hydrochloric Acid → 2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-8-piperidin-4-yl-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene

Participants

Reaction Steps

Alternatively, to a suspension of 4-[2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulen-8-yl]-piperidine-1-carboxylic acid tert-butyl ester (470 mg, 0.95 mmol) in MeOH (10 mL) was added 1M HCl in ether (1.9 mL, 1.90 mmol). The reaction mixture was stirred for 18 hours then the volatiles were removed in vacuo. The resultant residue was stirred in diethyl ether (20 mL) for 20 minutes then the solid was filtered off and further triturated with a mixture of MeOH and ether to give 375 as a white solid (104 mg, 28%). LCMS: RT=7.82 min, [M+H]+=396. 1H NMR δ (ppm) (DMSO-d6): 8.86 (2 H, s), 8.26 (1 H, d, J=8.20 Hz), 8.05 (1 H, s), 7.03 (1 H, dd, J=8.26, 1.83 Hz), 6.87 (1 H, d, J=1.78 Hz), 5.81-5.71 (1 H, m), 4.31 (2 H, t, J=5.01 Hz), 3.37 (2 H, t, J=5.01 Hz), 3.30 (2 H, d, J=12.46 Hz), 2.93 (2 H, d, J=11.52 Hz), 2.84-2.75 (1 H, m), 1.92-1.75 (4 H, m), 1.49 (6 H, d, J=6.59 Hz)

Provenance & Evidence