反应详情

温度

65 °C

13.00 g (0.043 mol) of ethyl 1-methyl-8-(methylthio)-4,5-dihydro-1H-pyrazolo[4,3-h]quinazoline-3-carboxylate were suspended in a mixture of 200 mL of methanol, 200 mL of dimethylformamide and 200 mL of ammonium hydrate 30%. The mixture was stirred at 65° C. in a closed bottle for about 8 hours. The solvent was then evaporated to dryness, the residue redissolved with dichloromethane and washed with water. The organic layer was dried over Na2SO4 and evaporated. The crude was purified by chromatography on a silica gel column eluted by a mixture cyclohexane/ethyl acetate, giving 6.16 g (52% yield) of the title compound.

1. customThe solvent was then evaporated to dryness
2. dissolutionthe residue redissolved with dichloromethane
3. washwashed with water
4. dry with materialThe organic layer was dried over Na2SO4
5. customevaporated
6. customThe crude was purified by chromatography on a silica gel column
7. washeluted by a mixture cyclohexane/ethyl acetate