Reaction #3746689
Related Literature (1)
openreactiondata ↗doi:10.6084/m9.figshare.5104873.v1; patent:US08758830B2
Conditions: temp:146.01; pressure:0.00; stir:; See reaction.notes.procedure_details.
Procedure: A mixture of N-(5-bromo-4-fluoro-1H-pyrrolo[2,3-b]pyridin-3-yl)isobutyramide (0.10 g, 0.33 mmol; Example 15, Step A), tert-butyl trans-4-fluoropiperidin-3-ylcarbamate (0.22 g, 1.00 mmol, Example J) and DIEA (0.17 mL, 1.00 mmol) in n-BuOH (3 mL) was stirred at 146° C. (bath) for 40 hours. The solvent was removed, and the residue was dissolved in ethyl acetate (20 mL), washed with water (10 mL), brine (10 mL), dried (sodium sulfate) and concentrated in vacuo. The residue was purified by reverse phase chromatography (Biotage SP4, C-18 25M+, 10-80% CH3CN/water, 20 CV). The product isolated was dissolved in DCM (2 mL), and TFA (0.5 mL) was added. The mixture was stirred at room temperature for 1 hour. The solvent was removed. The residue was dissolved in MeOH (1 mL), and 2N HCl in ether (3 mL) was added. The solid formed was collected to give N-(4-(trans-3-amino-4-fluoropiperidin-1-yl)-5-bromo-1H-pyrrolo[2,3-b]pyridin-3-yl)isobutyramide hydrochloride (0.017 g, 11%) as a solid. 1H NMR (400 MHz, D2O) δ 8.24 (s, 1H), 7.27 (s, 1H), 3.83 (m 1H), 3.70 (m, 1H), 3.45 (m, 1H), 3.25 (m, 2H), 2.64 (m, 1H), 2.21 (m, 2H), 1.88 (m, 1H), 1.10 (m, 6H). LCMS (APCI+) m/z 398 (M+H)+. The solvent was removed the residue was dissolved in ethyl acetate (20 mL) washed with water (10 mL), brine (10 mL) dried (sodium sulfate) concentrated in vacuo The residue was purified by reverse phase chromatography (Biotage SP4 The product isolated The mixture was stirred at room temperature for 1 hour The solvent was removed The residue was dissolved in MeOH (1 mL) 2N HCl in ether (3 mL) was added The solid formed was collected
Source ID: ord-2adb6f44eb4b4e1786e40fe050ddb385