反应详情

温度

75 °C

A mixture of 2-(chloromethyl)-8-methylimidazo[1,2-α]pyridine (0.297 g), 1-(4-chlorophenyl) piperazine dihydrochloride (Aldrich; 0.534 g), triethylamine (0.8 mL), THF (6 mL), and DMF (2 mL) is heated at 75° C. for 4 hours. Diisopropylethylamine (0.3 mL) is added and the mixture is stirred another hour, at which time the mixture is concentrated under reduced pressure and the residue is partitioned between saturated aq. sodium bicarbonate and dichloromethane. The organic layers are dried with MgSO4 and concentrated under reduced pressure. The residue is chromatographed on silica gel using methanol/dichloromethane (4/96). The appropriate fractions are combined and concentrated and the residue is crystallized from ethyl acetate/hexane to give 0.231 g of the title compound; mp 102-104° C.; MS m/z 340; IR (mineral oil) 1495, 1338, 2819, 1227, 743 cm-1 ; 1H NMR (CDCl3) δ2.61, 2.78, 3.22, 3.85, 6.68, 6.82, 6.94, 7.18, 7.58, 7.95.

1. concentrationis concentrated under reduced pressure
2. customthe residue is partitioned between saturated aq. sodium bicarbonate and dichloromethane
3. dry with materialThe organic layers are dried with MgSO4
4. concentrationconcentrated under reduced pressure
5. customThe residue is chromatographed on silica gel
6. concentrationconcentrated
7. customthe residue is crystallized from ethyl acetate/hexane