反应详情

A mixture of 6-ethyl-9-(4-benzyloxyphenyl)-2-trifluoromethylpurine (0.1 mmol), palladium on active carbon (0.001 mol, methanol (50 mL) and acetic acid (3 mL) was shaken under 30 psi hydrogen. After 5 hours, the reaction mixture was filtered through celite and the filtrate was concentrated under vacuum. The resulting residue was dissolved in 30 mL of ethyl acetate and washed with 5% aqueous sodium bicarbonate (1×30 mL). Concentration and Chromatography (5% methanol in dichloromethane) gave 6-ethyl-9-(4-hydroxyphenyl)-2-trifluoromethylpurine (21 mg, 93%). 1H NMR (300 MHz, CDCl3) δ 8.37 (s, 1H), 7.45 (d, J=7.2 Hz, 2H), 6.96 (d, J=7.2 Hz, 2H), 3.29 (q, J=7.5 Hz, 2 H), 3.11 (s, 1H), 1.41 (t, J=7.5 Hz, 3H). [ESMS m/z (309.4 (M+H)+)]

1. filtrationthe reaction mixture was filtered through celite
2. concentrationthe filtrate was concentrated under vacuum
3. dissolutionThe resulting residue was dissolved in 30 mL of ethyl acetate
4. washwashed with 5% aqueous sodium bicarbonate (1×30 mL)
5. concentrationConcentration and Chromatography (5% methanol in dichloromethane)