反应详情

(S)-1-(2-hydroxy-2-methyl-1-phenylpropyl)-3-(4-(hydroxymethyl)-3-methoxy-1-trityl-1H-pyrazolo[4,3-c]pyridin-6-yl)urea (533 mg, 0.849 mmol) was dissolved in DCM (3 ml), charged with triethylsilane (0.271 ml, 1.698 mmol) followed by TFA (3.27 ml, 42.5 mmol) and allowed to stir for 1 h at rt. The solvents were removed in vacuo and the residue was dissolved in 25 mL 10:1 EtOAc/MeOH and washed with 20 mL saturated sodium bicarbonate. The aq. was extracted 1×15 mL EtOAc and the combine organics were washed with brine, dried over sodium sulfate, concentrated vacuo and purified on silica gel 5-15% MeOH/DCM to provide (S)-1-(2-hydroxy-2-methyl-1-phenylpropyl)-3-(4-(hydroxymethyl)-3-methoxy-1H-pyrazolo[4,3-c]pyridin-6-yl)urea (110) as a white solid. MS: [M+H]+ m/z 386. 1H NMR (600 MHz, dmso) δ 12.00 (s, 1H), 9.20 (s, 1H), 7.31 (m, 2H), 7.25 (m, 2H), 7.15 (m, 1H), 7.07 (br s, 1H), 5.00 (t, J=6.0, 1H), 4.74 (d, J=6.0, 2H), 4.68 (s, 1H), 4.59 (d, J=9.0, 1H), 3.93 (s, 3H), 1.13 (s, 3H), 1.12 (s, 3H).

1. customThe solvents were removed in vacuo
2. dissolutionthe residue was dissolved in 25 mL 10:1 EtOAc/MeOH
3. washwashed with 20 mL saturated sodium bicarbonate
4. extractionThe aq. was extracted 1×15 mL EtOAc
5. washthe combine organics were washed with brine
6. dry with materialdried over sodium sulfate
7. concentrationconcentrated vacuo
8. custompurified on silica gel 5-15% MeOH/DCM