HCID 131734499, compound → HCID 118390792, compound

Participants

Reaction Steps

To a 50 mL round bottom flask charged with benzyl methyl (1-trityl-1H-pyrazolo[4,3-c]pyridine-3,6-diyl)dicarbamate (126 mg, 0.216 mmol) in ethyl acetate (4 ml) and methanol (4 ml) was added palladium on carbon (45.9 mg, 0.043 mmol). The flask was evacuated and back-filled with hydrogen gas using an attached balloon. This procedure was attempted a further two times. The reaction mixture was stirred under a hydrogen atmosphere at room temperature for 16 h. The palladium was filtered off by passing the reaction mixture through celite and washing through with ethyl acetate (20 mL). The volatiles were removed in vacuo to afford crude methyl (6-amino-1-trityl-1H-pyrazolo[4,3-c]pyridin-3-yl)carbamate (95 mg, 0.211 mmol, 98% yield) as a white solid. MS ESI calc'd. For C27H24N5O2 [M+H]+ 450. found 450.

Provenance & Evidence