Water → 9-(1-bromoethyl)-8-fluoro-2-(2-isopropyl-5-methyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diazabenzo[e]azulene

Participants

Reaction Steps

Phosphorus tribromide (0.53 mL of a 1.0 M solution in DCM) was added to a solution of 1-[8-fluoro-2-(2-isopropyl-5-methyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diazabenzo[e]azulen-9-yl]ethanol (98 mg, 0.26 mmol) in DCM (1 mL) at 0° C. The mixture was warmed to RT and stirred for 20 h. Water (2 mL) and sat. NaHCO3 (2 mL) were added and the mixture was extracted with DCM. The combined organics were washed (brine), dried (Na2SO4) and concentrated in vacuo to give the title compound (100 mg, 0.23 mmol, 88%) as a pale yellow solid. The product was taken on without further purification. 1H NMR (CDCl3, 300 MHz): δ 8.72 (1H, d, J=8.7 Hz), 7.60 (1H, s), 6.75 (1H, d, J=11.0 Hz), 5.82 (1H, sept., J=6.6 Hz), 5.45 (1H, q, J=7.0 Hz), 4.52-4.49 (2H, m), 4.44-4.41 (2H, m), 2.42 (3H, s), 2.11 (3H, d, J=7.0 Hz), 1.60 (6H, d, J=6.6 Hz)

Provenance & Evidence