Aniline → ethyl 7-anilino-1H-pyrazolo[4,3-b]pyridine-6-carboxylate
Reaktionsgleichung
Cl[C:2]1[C:7]([C:8]([O:10][CH2:11][CH3:12])=[O:9])=[CH:6][N:5]=[C:4]2[CH:13]=[N:14][NH:15][C:3]=12.[NH2:16][C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1>>[NH:16]([C:2]1[C:7]([C:8]([O:10][CH2:11][CH3:12])=[O:9])=[CH:6][N:5]=[C:4]2[CH:13]=[N:14][NH:15][C:3]=12)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1Komponenten
3
Versuchsvorschrift
Ethyl 7-chloro-1H-pyrazolo[4,3-b]-pyridine-6-carboxylate (370 mg, 1.6 mmol) was dissolved in aniline (3 ml) and stirred overnight. The resulting mixture was triturated with 60°-80° petrol, and the precipitated solid was collected and dissolved in aqueous ethanol. The solution was adjusted to pH 8 with saturated sodium hydrogen carbonate solution, and the precipitated solid was collected to give the title compound (310 mg, 67%) m.p. 164°-165° C.
Aufarbeitung
- customThe resulting mixture was triturated with 60°-80° petrol
- custom