Potassium Carbonate → 2-(1-isopropyl-1H-1,2,4-triazol-5-yl)-9-(1-(2-methoxyethyl)piperidin-4-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepine

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-8-piperidin-4-yl-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene trifluoroacetic acid salt (300 mg, 0.61 mmol) in DMF (3.5 mL) were added potassium carbonate (290 mg, 2.10 mmol) and 1-bromo-2-methoxy-ethane (93 mg, 0.67 mmol). The resultant reaction mixture was stirred at 60° C. for 4 hours before being cooled to RT and diluted with DCM. The mixture was washed sequentially with sodium hydrogen carbonate solution (sat. aq.), water and brine then dried (MgSO4) and concentrated in vacuo. The resultant residue was purified by flash column chromatography (SiO2, gradient 0-8% MeOH in DCM) and triturated with petroleum ether to afford 286 as a white solid (127 mg, 0.29 mmol, 48%). LCMS: RT=3.02 min, [M+H]+=437. 1H NMR δ (ppm)(DMSO-d6): 8.28 (1 H, d, J=8.28 Hz), 7.86 (1 H, d, J=0.62 Hz), 7.85 (1 H, s), 7.01 (1 H, dd, J=8.36, 1.77 Hz), 6.85 (1 H, d, J=1.72 Hz), 5.90-5.80 (1 H, m), 4.45 (4 H, m), 3.40 (2 H, t, J=5.89 Hz), 3.20 (3 H, s), 2.93 (2 H, d, J=11.11 Hz), 2.01 (2 H, dd, J=12.41, 10.21 Hz), 1.70 (2 H, d, J=12.52 Hz), 1.58 (2 H, ddd, J=24.42, 12.21, 3.61 Hz), 1.44 (6 H, d, J=6.60 Hz). 3H obscured by solvent.

Provenance & Evidence