反应详情

温度

75 °C

A mixture of 2-(chloromethyl)-6-ethoxyimidazo[1,2-α]pyridine (0.204 g), 1-(2,4-dichlorophenyl) piperazine (Example 31, Step 1; 0.2283 g), triethylamine (Aldrich; 0.15 mL), and THF (1.3 mL) is stirred at 75° C. until the reaction is judged complete by thin layer chromatography. The cooled mixture is concentrated under reduced pressure and partitioned between dichloromethane and saturated aq. sodium bicarbonate. The combined organic layers are dried with MgSO4 and concentrated under reduced pressure. The residue is chromatographed on silica gel using methanol/dichloromethane (2/98) and crystallized from ethyl acetate/ether to give 0.0936 g of the title compound; mp 171-172° C.; MS m/z 404, 406; IR (mineral oil) 1478, 1189, 797, 1508, 1273 cm-1 ; 1H NMR (CDCl3) δ1.45, 2.77, 3.08, 3.77, 3.98, 6.94, 7.17, 7.34, 7.45, 7.47, 7.60.

1. concentrationThe cooled mixture is concentrated under reduced pressure
2. custompartitioned between dichloromethane and saturated aq. sodium bicarbonate
3. dry with materialThe combined organic layers are dried with MgSO4
4. concentrationconcentrated under reduced pressure
5. customThe residue is chromatographed on silica gel
6. customcrystallized from ethyl acetate/ether