Dichloromethane → N-(4-(cis-3-amino-4-fluoropiperidin-1-yl)-5-bromo-1H-pyrrolo[2,3-b]pyridin-3-yl)isobutyramide hydrochloride

Temperature

155 °C

A mixture of N-(5-bromo-4-fluoro-1H-pyrrolo[2,3-b]pyridin-3-yl)isobutyramide (0.11 g, 0.37 mmol; Example 15, Step A), benzyl-cis-4-fluoropiperidin-3-ylcarbamate (0.19 g, 0.75 mmol; Example F) and DIEA (0.26 mL, 1.49 mmol) in n-BuOH (2 mL) was stirred at 155° C. (bath) for 22 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, 30 CV). The product isolated was dissolved in DCM (3 mL), and TMS-I (0.16 mL, 1.12 mmol) was added. The reaction mixture was stirred at room temperature for 2 hours. The solvent was removed in vacuo, water (10 mL) and ether (30 mL) were added. The aqueous layer was separated, basified with 30% potassium carbonate to a pH of about 9, and extracted with DCM (2×20 mL). The combined organic layers were dried (sodium sulfate) and concentrated in vacuo. The residue was dissolved in DCM (3 mL), and 2N HCl in ether (2 mL) was added. The solid formed was collected to give N-(4-(cis-3-amino-4-fluoropiperidin-1-yl)-5-bromo-1H-pyrrolo[2,3-b]pyridin-3-yl)isobutyramide hydrochloride (36 mg, 21%) as a solid. 1H NMR (400 MHz, D2O) δ 8.25 (s, 1H), 7.27 (s, 1H), 3.86 (m, 1H), 3.62 (m, 1H), 3.41 (m, 2H), 3.20 (m, 1H), 2.64 (m, 1H), 2.12 (m, 2H), 1.96 (m 1H), 1.11 (t, 6H). LCMS (APCI+) m/z 398 (M+H)+.

1. customThe solvent was removed
2. dissolutionthe residue was dissolved in ethyl acetate (20 mL)
3. washwashed with water (10 mL), brine (10 mL)
4. dry with materialdried (sodium sulfate)
5. concentrationconcentrated in vacuo
6. customThe residue was purified by reverse phase chromatography (Biotage SP4
7. customThe product isolated
8. stirringThe reaction mixture was stirred at room temperature for 2 hours
9. customThe solvent was removed in vacuo, water (10 mL) and ether (30 mL)
10. additionwere added
11. customThe aqueous layer was separated
12. extractionextracted with DCM (2×20 mL)
13. dry with materialThe combined organic layers were dried (sodium sulfate)
14. concentrationconcentrated in vacuo
15. dissolutionThe residue was dissolved in DCM (3 mL)
16. addition2N HCl in ether (2 mL) was added
17. customThe solid formed
18. customwas collected

ORD record

ord-234aabde2ae546eb84bca9985b74b4bc

Source dataset

uspto-grants-2016_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09365568B2