HCID 22758819、化合物 → HCID 22758848、化合物
反応式
C[O:2][C:3]1[CH:12]=[C:11]2[C:6]([CH2:7][CH2:8][N:9]3[C:16](=[O:17])[C:15]([C:18]([O:20]CC)=[O:19])=[CH:14][N:13]=[C:10]32)=[CH:5][CH:4]=1>Br>[OH:2][C:3]1[CH:12]=[C:11]2[C:6]([CH2:7][CH2:8][N:9]3[C:16](=[O:17])[C:15]([C:18]([OH:20])=[O:19])=[CH:14][N:13]=[C:10]32)=[CH:5][CH:4]=1参加物
3
実験手順
A solution of ethyl 6,7-dihydro-10-methoxy-4-oxo-4H-pyrimido[2,1-a]isoquinoline-3-carboxylate (5.0 g., 0.0175 mole) in 48% hydrobromic acid (125 ml.) was refluxed for 4 hours. The solution was cooled and the yellow product collected, washed with water, and dissolved in warm 0.5 N NaOH (80 ml.). The basic solution was treated with decolorizing carbon, filtered and the filtrate acidified with hydrochloric acid. The precipitated material was washed on the filter successively with water, ethanol and acetone to give 3.5 g. (81% yield) of the title acid, m.p. 326°-327°.
後処理
- temperatureThe solution was cooled
- customthe yellow product collected