反应详情

To a solution of (S)-ethyl 2-(7-(4-(allyloxy)-4-methylpiperidin-1-yl)-2-(hydroxymethyl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)-2-(tert-butoxy)acetate (0.2747 g, 0.579 mmol) in wet DCM (5 mL) was added Dess-Martin periodinane (0.319 g, 0.752 mmol) and the mixture was stirred at room temperature. After 3 h, the solids were removed by filtration. The filtrate was washed with aq Na2S2O3, dried (Na2SO4), filtered and concentrated. The resulting oil was purified by flash chromatography (Biotage; 0%-50% EtOAc/hexane; 10 CV) to give the title compound (0.1962 g, 0.415 mmol, 71.7% yield) as a colorless oil. 1H NMR (400 MHz, CDCl3) δ 10.17 (s, 1H), 7.02 (s, 1H), 6.19-5.98 (m, 1H), 5.96-5.76 (m, 1H), 5.57-5.37 (m, 2H), 5.24 (dd, J=10.4, 1.6 Hz, 1H), 4.24 (dd, J=15.9, 7.1 Hz, 2H), 4.03 (d, J=4.9 Hz, 2H), 2.65 (s, 3H), 2.08-1.93 (m, 5H), 1.81-1.66 (m, 1H), 1.37 (s, 3H), 1.29-1.25 (m, 12H). 2 piperidine protons not seen by NMR. LCMS (M+H) calcd for C25H37N4O5: 473.27. found: 473.3.

1. customthe solids were removed by filtration
2. washThe filtrate was washed with aq Na2S2O3
3. dry with materialdried (Na2SO4)
4. filtrationfiltered
5. concentrationconcentrated
6. customThe resulting oil was purified by flash chromatography (Biotage; 0%-50% EtOAc/hexane; 10 CV)