Ammonium Chloride → HCID 86689035, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of tert-butyl 3-iodo-1-(4-nitrophenyl)-1H-pyrazolo[3,4-d]pyrimidin-4-ylcarbamate (28) (4.29 g, 8.7 mmol) in THF/EtOH/H2O (40 mL/20 mL/10 mL) was added Fe powder (2.43 g, 43.45 mmol) and NH4Cl (4.65 g, 86.9 mmol). The resulting mixture was purged with N2 before heated to 50° C. for 2 h. The mixture was cooled and filtered through a Celite pad. The solvents were evaporated and the residue was separated in DCM and water. The aqueous layer was extracted with DCM (X4). The combined organic layers were dried over Na2SO4. Solvent was removed under vacuum and purified by flash chromatography (0-60% EA in PE with 0.5% TEA) to provide tert-butyl 1-(4-aminophenyl)-3-iodo-1H-pyrazolo[3,4-d]pyrimidin-4-ylcarbamate (29) (3.4 g, 86%) as a yellow solid. LC-MS (ESI): m/z (M+1) 453.0.

Provenance & Evidence