反应详情

3.12 g of 4-(diphenylmethylamino)-1-piperidinepropanamine and 1.72 g of ethyl 2-(6-chloroimidazo[1,2-b]pyridazin-2-yl)-2-methylpropionate were stirred at 180° C. for 3 hours. After cooling, aqueous sodium bicarbonate was added, followed by extraction with ethyl acetate; the extract was washed with saturated saline and dried with magnesium sulfate. The dry product was concentrated under reduced pressure; the residue was subjected to silica gel column chromatography and eluted with ethyl acetate:methanol:triethylamine (50:5:1). The desired fraction was collected and concentrated under reduced pressure; the residue was crystallized by the addition of ethyl ether-hexane (1:3), collected by filtration, washed with hexane and dried to yield 1.83 g of the title compound.

1. temperatureAfter cooling
2. extractionfollowed by extraction with ethyl acetate
3. washthe extract was washed with saturated saline
4. dry with materialdried with magnesium sulfate
5. concentrationThe dry product was concentrated under reduced pressure
6. washeluted with ethyl acetate:methanol:triethylamine (50:5:1)
7. customThe desired fraction was collected
8. concentrationconcentrated under reduced pressure
9. customthe residue was crystallized by the addition of ethyl ether-hexane (1:3)
10. filtrationcollected by filtration
11. washwashed with hexane
12. customdried