Selenium Dioxide → HCID 12281154, Verbindung

Reaktionsgleichung

[C:1]([C:9]1[C:10]([O:24][CH2:25][CH3:26])=[C:11]2[CH:17]=[N:16][N:15](CC3OC=CC=3)[C:12]2=[N:13][CH:14]=1)(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[Se](=O)=O>O.COCCOCCOC>[C:1]([C:9]1[C:10]([O:24][CH2:25][CH3:26])=[C:11]2[CH:17]=[N:16][NH:15][C:12]2=[N:13][CH:14]=1)(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Komponenten

Versuchsvorschrift

1.7 g. of 5-Benzoyl-4-ethoxy-1-(2-furyl)methyl-1H-pyrazolo[3,4-b]pyridine (0.005 mol.) are dissolved in 5 ml. of diethyleneglycol dimethyl ether, 1.1 g. of selenium dioxide are added and the mixture is heated with stirring at 160°. After the addition of 1 drop of water, the temperature is maintained for 1 hour. The mixture is filtered hot and 5-benzoyl-4-ethoxy-1H-pyrazolo[3,4-b]pyridine precipitates on cooling. Recrystallization from butanol yields 1 g. (77%). m.p. 195°-197°.