反应详情

温度

60 °C

To a mixture of tert-butyl 3-(6-(dibenzylamino)-8-oxo-7H-purin-9(8H)-yl)phenylcarbamate (4) (3.0 g, 5.7 mmol) in 120 mL MeOH was added 3.0 g Pd(OH)2/C (20 wt %) and 6 drops of con. HCl. After two vacuum/H2 cycles to remove air from the reaction flask, the stirred mixture was heated at 60° C. under hydrogen atmosphere overnight. The reaction mixture was filtered through a Celite pad and the filtrate was concentrated to dryness in vacuo. The residue was purified by column chromatography (silica gel, 0 to 5% methanol in DCM) to give tert-butyl 3-(6-amino-8-oxo-7H-purin-9(8H)-yl)phenylcarbamate (5) (1.5 g, 76%) as a white solid. LC-MS (ESI): m/z (M+1) 343.

1. customAfter two vacuum/H2 cycles to remove air from the reaction flask
2. filtrationThe reaction mixture was filtered through a Celite pad
3. concentrationthe filtrate was concentrated to dryness in vacuo
4. customThe residue was purified by column chromatography (silica gel, 0 to 5% methanol in DCM)