Water → HCID 178499173, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of methyl 1H-pyrazolo[3,4-b]pyridine-3-carboxylate (VI) (0.177 g, 1 mmol), sodium acetate (0.492 g, 6 mmol) and bromine (0.308 mL, 6 mmol) in glacial acetic acid (5 mL) was heated overnight at 120° C. in a sealed tube. The solution was cooled and poured into water. The solids formed were filtered, washed with water and dried at room temperature under vacuum. The crude product was purified on a flash silica gel column (100% DCM→100:2 DCM:MeOH) to produce methyl 5-bromo-1H-pyrazolo[3,4-b]pyridine-3-carboxylate (VII) as a white solid (78 mg, 0.31 mmol, 30% yield). 1H NMR (CDCl3) δ ppm 3.95 (s, 3H), 8.62 (d, J=3.01 Hz, 1H), 8.73 (d, J=3.01 Hz, 1H); ESIMS found for C8H6BrN3O2 m/z 256.3 (M+H).

Provenance & Evidence