Hydrazine hydrate (1:1) → HCID 178440702, Verbindung
Reaktionsgleichung
Cl[C:2]1[N:24]=[CH:23][CH:22]=[CH:21][C:3]=1[C:4]([C:6]1[CH:11]=[C:10]([C:12]([CH3:15])([CH3:14])[CH3:13])[C:9]([OH:16])=[C:8]([C:17]([CH3:20])([CH3:19])[CH3:18])[CH:7]=1)=O.O.[NH2:26][NH2:27]>N1C=CC=CC=1>[C:12]([C:10]1[CH:11]=[C:6]([C:4]2[C:3]3[C:2](=[N:24][CH:23]=[CH:22][CH:21]=3)[NH:27][N:26]=2)[CH:7]=[C:8]([C:17]([CH3:19])([CH3:20])[CH3:18])[C:9]=1[OH:16])([CH3:13])([CH3:14])[CH3:15]Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
A solution of 69.1 g of 4-(2-chloronicotinoyl)-2,6-di-tertiary butylphenol and 45 g of hydrazine hydrate in 380 ml of pyridine is refluxed for 5 hours. After the pyridine is distilled off under reduced pressure, to the obtained residue is added water. The crude crystals precipitated are recrystallized from ethanol to give 62.5 g of 3-(3,5-di-tertiary butyl-4-hydroxyphenyl)-1H-pyrazolo[3,4-b]pyridine as white crystals, melting at 216°-217° C.