反应详情

Alternatively, 8-Bromo-2-(2-isopropyl-5-methyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene may be prepared whereby a mixture of 4-bromo-2-fluoro-benzamidine hydrochloride (5.67 g, 22.3 mmol), potassium hydrogen carbonate (8.95 g, 89.4 mmol), THF (45 mL) and water (10 mL) was heated to reflux and a solution of 2-bromo-1-(2-isopropyl-5-methyl-2H-[1,2,4]triazol-3-yl)-ethanone (5.5 g, 22.3 mmol) in THF (15 mL) added dropwise. The reaction mixture was heated at reflux for 18 h before removal of volatile solvent in vacuo. The resultant suspension was filtered and the residue triturated in hot diethyl ether to give 5-[2-(4-Bromo-2-fluoro-phenyl)-1H-imidazol-4-yl]-1-isopropyl-3-methyl-1H-[1,2,4]triazole as an off-white solid (6.4 g, 79%). 1H NMR 400 MHz (DMSO-d) δ: 7.97 (1 H, t, J=8.30 Hz), 7.81 (1 H, s), 7.76 (1 H, dd, J=10.68, 1.92 Hz), 7.58 (1 H, dd, J=8.42, 1.93 Hz), 5.79 (1 H, br, m), 2.26 (3 H, s), 1.44 (6 H, d, J=6.60 Hz).

1. temperaturewas heated
2. temperatureto reflux
3. temperatureThe reaction mixture was heated
4. temperatureat reflux for 18 h before removal of volatile solvent in vacuo
5. filtrationThe resultant suspension was filtered
6. customthe residue triturated in hot diethyl ether