4-Nitropyridine N-oxide → 4-(4-amino-3-iodo-1H-pyrazolo[3,4-d]pyrimidin-1-yl)-1-pyridiniumolate

Participants

Reaction Conditions

Reaction Steps

A solution of 3-iodo-1H-pyrazolo[3,4-d]pyrimidin-4-amine (5.00 g, 0.019 mol) in N,N-dimethylformamide (50 mL) was reacted with 60% sodium hydride in oil (0.92 g, 0.023 mol) at ambient temperature. The mixture was stirred for 15 minutes, and 4-nitropyridine-N-oxide (5.37 g, 0.038 mol) was added. The mixture was heated at 100° C. for 18 hours. The precipitate which formed was filtered, washing with N,N-dimethylformamide and ethyl acetate to give 4-(4-amino-3-iodo-1H-pyrazolo[3,4-d]pyrimidin-1-yl)-1-pyridiniumolate (3.79 g, 0.011 mol) as a tan solid:

Provenance & Evidence