反应详情

温度

50 °C

To a solution of 8-chloro-7-(4-chlorophenyl)-2H-[1,2,4]triazolo[4,3-b]pyridazin-3-one (0.62 g, 2.21 mmol), prepared as described in Example 354, in DMF (10 mL) at RT was added K2CO3 (0.61 g, 4.4 mmol) and 2-(chloromethyl)pyrazine (0.83 g). The reaction mixture was heated at 50° C. for 2 h. After this time, the mixture was diluted with EtOAc (150 mL). The resultant solution was washed with water and saturated aqueous NaCl. The organic layer was dried (MgSO4), filtered and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel eluting with hexanes:EtOAc 1:2 to afford 0.61 g of the title compound, 8-chloro-7-(4-chlorophenyl)-2-(pyrazin-2-ylmethyl)-2H-[1,2,4]triazolo[4,3-b]pyridazin-3-one as a yellow solid. HPLC RT: 2.86 min; MS, M+H=373; 1H NMR (CDCl3): δ 8.64 (d, 1H), 8.54 (m, 2H), 8.11 (s, 1H), 7.54-7.49 (m, 4H), 5.48 (s, 2H).

1. washThe resultant solution was washed with water and saturated aqueous NaCl
2. dry with materialThe organic layer was dried (MgSO4)
3. filtrationfiltered
4. concentrationconcentrated under reduced pressure
5. customThe residue was purified by column chromatography on silica gel eluting with hexanes:EtOAc 1:2