反应详情

The suspension of 8,9-dihydro-10-methyl-7-[(5-methyl-1H-imidazol-4-yl)methyl]pyrido[1,2-a]indol-6(7H)one (2.0 g) in methanol (60 ml) was treated with hydrogen chloride in ethanol and then diluted with hot aqueous ethanol (water:ethanol, 1:4) to give a clear solution. After filtration of the insoluble materials, the filtrate was evaporated under reduced pressure to about 40 ml and allowed to stand at room temperature overnight. Filtration, followed by washing with ethanol, gave 8,9-dihydro-10-methyl-7-[(5-methyl-1H-imidazol-4-yl)-methyl]pyrido[1,2-a]indol-6(7H)-one hydrochloride (2.10 g) as crystals.

1. customto give a clear solution
2. filtrationAfter filtration of the insoluble materials
3. customthe filtrate was evaporated under reduced pressure to about 40 ml
4. filtrationFiltration
5. washby washing with ethanol