Hydrazine hydrate (1:1) → HCID 136352998, compound

Participants

Reaction Steps

To a suspension of 0.39 g (0.80 mmol) of 4-(5-((1,3-dioxoisoindoline-2-yl)methyl)furan-2-yl)-6-(4-hydroxyphenyl)-1H-pyrazolo[3,4-b]pyridine-5-carbonitrile obtained following the sequences of procedures B7 and D1, in 8 ml of ethanol, are added 368 μL (0.38 g, 7.6 mmol) of hydrazine hydrate. The mixture is refluxed for 3 h. The precipitate obtained is filtered and dissolved in water. The mixture is brought to pH=7-8 with 30% sodium hydroxide and extracted with ethyl acetate. The organic phases are dried over magnesium sulfate, filtered, and concentrated. The residue obtained is purified by silica chromatography (eluent 7N NH4OH in methanol in dichloromethane: 10:90) to yield 0.057 g (22%) of 4-(5-(aminomethyl)furan-2-yl)-6-(4-hydroxyphenyl)-1H-pyrazolo[3,4-b]pyridine-5-carbonitrile in the form of a yellow solid.

Provenance & Evidence