反应详情

温度

80 °C

A mixture of 6-bromo-2-(chloromethyl)imidazo[1,2-α]pyridine (Example 15, Step 1; 0.3042 g), 1-(4-chlorophenyl)piperazine dihydrochloride (Aldrich; 0.3708 g), triethylamine (Aldrich; 0.55 mL), and ethylene glycol (5.6 mL) is stirred for 1 h at 80° C. After cooling, the mixture is partitioned between water and dichloromethane. The combined organic layers are washed with brine, dried with MgSO4, and concentrated under reduced pressure. The residue is chromatographed on silica gel using methanol/dichloromethane (4/96) to give, after crystallization from ethyl acetate/methanol/dichlormetane, 0.1756 g of the title compound; mp 154-155° C.; MS m/z 404, 406, 408; IR (mineral oil) 1495, 1500, 1224, 823, 812 cm-1 ; 1H NMR (CDCl3) δ2.72, 3.19, 3.76, 6.83, 7.20, 7.22, 7.47, 7.52, 8.24.

1. temperatureAfter cooling
2. customthe mixture is partitioned between water and dichloromethane
3. washThe combined organic layers are washed with brine
4. dry with materialdried with MgSO4
5. concentrationconcentrated under reduced pressure
6. customThe residue is chromatographed on silica gel
7. customto give
8. customafter crystallization from ethyl acetate/methanol/dichlormetane, 0.1756 g of the title compound