反应详情

A solution of tert-butyl (R)-1-(5-bromo-3-((S)-tetrahydrofuran-2-carboxamido)-1H-pyrrolo[2,3-b]pyridin-4-yl)piperidin-3-ylcarbamate (150 mg, 0.295 mmol) in neat TFA (3 mL) was stirred at room temperature for 30 minutes and concentrated in vacuo. The resulting residue was purified by C-18 reverse phase flash chromatography (Biotage C-18, 12M+) on Biotage SP4 unit eluting with a gradient of 1-50% CH3CN/water gradient (14 CV). The product obtained was dissolved in minimal MeOH, diluted with CH2Cl2 (1 mL), and treated with 1M HCl in ether (3 mL). The resulting suspension was concentrated in vacuo and evaporated from CH2Cl2 (3×5 mL). The solid obtained was dried under high vacuum to provide (S)-N-(4-((R)-3-aminopiperidin-1-yl)-5-bromo-1H-pyrrolo[2,3-b]pyridin-3-yl)tetra-hydrofuran-2-carboxamide hydrochloride (117 mg, 0.243 mmol, 82.4% yield) as a solid. NMR (400 MHz, (CD3)2SO) δ 11.72 (s, 1H), 9.82 (s, 1H), 8.29 (br s, 3H), 8.21 (s, 1H), 7.89 (s, 1H), 4.39 (t, 1H), 4.02-3.97 (m, 1H), 3.85-3.79 (m, 2H), 3.63-3.55 (m, 1H), 3.42-3.35 (m, 1H), 3.33-3.21 (m, 2H), 2.97-2.89 (m, 1H), 2.27-2.19 (m, 1H), 2.17-2.09 (m, 1H), 1.97-1.92 (m, 1H), 1.89-1.83 (m, 2H), 1.79-1.73 (m, 1H), 1.49-1.40 (m, 1H); LCMS (APCI+) m/z 408, 410.1 (M+H)+; Retention time=2.18 minutes (Method 2).

1. concentrationconcentrated in vacuo
2. customThe resulting residue was purified by C-18 reverse phase flash chromatography (Biotage C-18, 12M+) on Biotage SP4 unit
3. washeluting with a gradient of 1-50% CH3CN/water gradient (14 CV)
4. customThe product obtained
5. concentrationThe resulting suspension was concentrated in vacuo
6. customevaporated from CH2Cl2 (3×5 mL)
7. customThe solid obtained
8. customwas dried under high vacuum