反应详情

1H-Indazole-3-carboxaldehyde (75 mg, 0.51 mmol) and (polystyrylmethyl)trimethylammonium cyanoborohydride (125 mg, 0.51 mmol) were added to a solution of 6-(piperazin-1-yl)-3-(trifluoromethyl)-[1,2,4]triazolo[4,3-b]pyridazine (100 mg, 0.37 mmol) in DCM (2 mL)/acetic acid (0.2 mL). The mixture was stirred at ambient temperature for 18 hours. The resin was filtered off and the filtrate was evaporated. The crude product was purified by preparative HPLC (Waters XTerra C18 column, 5μ silica, 19 mm diameter, 100 mm length), using decreasingly polar mixtures of water (containing 1% ammonia) and MeCN as eluents. Fractions containing the desired compound were evaporated to dryness to afford 6-[4-(1H-indazol-3-ylmethyl)piperazin-1-yl]-3-(trifluoromethyl)[1,2,4]triazolo[4,3-b]pyridazine (89 mg, 60%) as a white solid.

1. filtrationThe resin was filtered off
2. customthe filtrate was evaporated
3. customThe crude product was purified by preparative HPLC (Waters XTerra C18 column, 5μ silica, 19 mm diameter, 100 mm length)
4. additionFractions containing the desired compound
5. customwere evaporated to dryness