Triphenylphosphine → HCID 86721084, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 4-chloro-1H-pyrazolo[3,4-d]pyrimidine (0.2 g, 1.29 mmol) in anh THF (10 mL), 2-(piperidin-1-yl)ethanol (0.258 mL, 1.94 mmol) and triphenylphosphine (0.51 g, 1.94 mmol) were sequentially added. The reaction mixture was cooled to 0° C. and diisopropylazodicarboxylate (0.38 mL, 1.94 mmol) was added dropwise. The mixture was stirred for 30 min. at 0° C. and kept overnight at 4° C. The solvent was removed at reduced pressure and the residue was dissolved in DCM and washed with diluted HCl 1N. The aqueous phase was separated, basified and extracted with DCM. The organic phase was separated, dried and the solvent was removed under reduced pressure to give a residue that was purified by flash chromatography eluting with (EtOAc/Petroleum ether, 8:2) to yield 4-chloro-1-(2-(piperidin-1-yl)ethyl)-1H-pyrazolo[3,4-d]pyrimidine (146 mg, 55 mmol, 42%) as an oil that solidifies “on standing”.

Provenance & Evidence