Potassium Carbonate → HCID 68157388, compound

Temperature

85 °C

A mixture of 4-(trifluoromethyl)-1H-imidazole (2000 mg, 14.70 mmol), 2-chloro-5-nitropyridine (2330 mg, 14.70 mmol), and potassium carbonate (4060 mg, 29.4 mmol) in acetonitrile (14.7 mL) was heated at 85° C. overnight. The reaction was diluted with water and extracted three times with ethyl acetate. The combined organic layers were washed with brine, dried over sodium sulfate, filtered and concentrated. The crude residue was dissolved in ethanol (20 mL) and ethyl acetate (15 mL). 10 wt % Palladium on carbon (500 mg) was added to the solution. The mixture was pressurized to 50 psi hydrogen and was shaken for 5 hours. The reaction was filtered through celite, rinsing with methanol. The filtrate was concentrated to give 6-(4-(trifluoromethyl)-1H-imidazol-1-yl)pyridin-3-amine. 1H NMR (400 MHz, CDCl3, δ): 8.15 (s, 1H), 7.93 (d, J=2.73 Hz, 1H), 7.85 (s, 1H), 7.20-7.15 (m, 1H), 7.14-7.09 (m, 1H), 3.13-2.30 (m, 2H). MS (M+HCO2−): 273.0.

1. extractionextracted three times with ethyl acetate
2. washThe combined organic layers were washed with brine
3. dry with materialdried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated
6. dissolutionThe crude residue was dissolved in ethanol (20 mL)
7. addition10 wt % Palladium on carbon (500 mg) was added to the solution
8. filtrationThe reaction was filtered through celite
9. washrinsing with methanol
10. concentrationThe filtrate was concentrated

ORD record

ord-8471a4be25c44831b4d1e7c8b744541f

Source dataset

uspto-grants-2013_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08507533B2