Methanol → HCID 68157525, compound

Temperature

20 °C

To a solution of (+\−)-methyl 6-(3-methyl-(6-(4-(trifluoromethyl)-1H-pyrazol-1-yl)pyridin-3-yl)butylamino)nicotinate (800 mg, 1.85 mmol) in methanol (5 mL) was added 2N aqueous sodium hydroxide (9.2 mL, 18.4 mmol). The resulting mixture was stirred at 20° C. for 2 h. Methanol was removed under reduced pressure and the residue was acidified by addition of 1N aqueous HCl to pH 3-4 and extracted with dichloromethane (30 mL×2). The combined organic layers were concentrated under reduced pressure. The residue was dissolved in DMF (10 mL). HATU (1.36 mg, 3.58 mmol) and N,N-di-iso-propylethylamine (1.15 mg, 8.95 mmol) were added. Methyl 3-aminopropanoate hydrochloride (370 mg, 2.68 mmol) was added. The resulting mixture was stirred at 30° C. for 1 h. The mixture was poured into brine (30 mL) and extracted with ethyl acetate (30 mL×2). The combined organic layers were washed with 1N aqueous HCl (30 mL), dried over anhydrous Na2SO4 and concentrated to dryness. The crude residue was purified silica gel chromatography to give (+\−)-methyl 3-(6-(3-methyl-1-(6-(4-(trifluoromethyl)-1H-pyrazol-1-yl)pyridin-3-yl)butylamino)nicotinamido)propanoate (850 mg) as an oil. 1H NMR (400 MHz, CDCl3) δ 8.75 (s, 1H), 8.37 (d, J=12.0 Hz, 2H), 7.87 (d, J=8.4 Hz, 1H), 7.80 (s, 1H), 7.76-7.70 (m, 2H), 6.52 (s, 1H), 6.22 (d, J=8.4 Hz, 1H), 5.07 (d, J=4.0 Hz, 1H), 4.86 (d, J=9.2 Hz, 1H), 3.62-3.58 (m, 5H), 2.54 (t, J=5.6 Hz, 2H), 1.77-1.59 (m, 3H), 1.75-1.63 (m, 2H), 0.95 (d, J=6.0 Hz, 3H), 0.91 (d, J=6.0 Hz, 3H). (+\−)-methyl 3-(6-(3-methyl-1-(6-(4-(trifluoromethyl)-1H-pyrazol-1-yl)pyridin-3-yl)butylamino)nicotinamido)propanoate was resolved by SFC (column: Chiralpak AD-3, 50×4.6 mm×3 μm; mobile phase: 40% methanol in CO2; modifier: 0.05% diethylamine; flow rate: 4 mL/min) to give methyl 3-(6-(3-methyl-1-(6-(4-(trifluoromethyl)-1H-pyrazol-1-yl)pyridin-3-yl)butylamino)nicotinamido)propanoate, Isomer 1 (450 mg, retention time: 0.62 min) and methyl 3-(6-(3-methyl-1-(6-(4-(trifluoromethyl)-1H-pyrazol-1-yl)pyridin-3-yl)butylamino)nicotinamido)propanoate, isomer 2 (400 mg, retention time: 1.30 min).

1. customMethanol was removed under reduced pressure
2. additionthe residue was acidified by addition of 1N aqueous HCl to pH 3-4
3. extractionextracted with dichloromethane (30 mL×2)
4. concentrationThe combined organic layers were concentrated under reduced pressure
5. dissolutionThe residue was dissolved in DMF (10 mL)
6. stirringThe resulting mixture was stirred at 30° C. for 1 h
7. extractionextracted with ethyl acetate (30 mL×2)
8. washThe combined organic layers were washed with 1N aqueous HCl (30 mL)
9. dry with materialdried over anhydrous Na2SO4
10. concentrationconcentrated to dryness
11. customThe crude residue was purified silica gel chromatography

ORD record

ord-8e65700ee47c407daa160535f27c9155

Source dataset

uspto-grants-2014_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08859591B2