Triphenylphosphine → (R)-tert-Butyl 3-(4-amino-3-iodo-1H-pyrazolo[3,4-d]pyrimidin-1-yl)piperidine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a solution of 3-iodo-1H-pyrazolo[3,4-d]pyrimidin-4-ylamine (4.0 g, 15.32 mmol, 1.0 eq), (S)-3-hydroxypiperidine-1-carboxylic acid tert-butyl ester (4.313 g, 21.44 mmol, 1.4 eq), and PPh3 (8.031 g, 30.64 mmol, 2.0 eq) in dry THF (200 mL), DIAD (4.658 g, 22.98 mmol, 1.5 eq) was added at room temperature. The reaction mixture was stirred at 70° C. for 72 h. The reaction mixture was concentrated and purified by silica gel chromatography (eluted with PE: EtOAc=1:1) to afford (R)-tert-butyl 3-(4-amino-3-iodo-1H-pyrazolo[3,4-d]pyrimidin-1-yl)piperidine-1-carboxylate (2.8 g, 41.2% in yield).

Provenance & Evidence