Potassium Carbonate → HCID 67254959, compound

In NMP (15 mL) was placed 3-amino-4-chlorophenol (1.70 g, 11.8 mmol) and potassium t-butoxide (1.40 g, 12.4 mmol) and the mixture was stirred overnight at RT. The dark solution was treated with the 3,5-difluoropyridine (2.73 g, 23.7 mmol) and powdered potassium carbonate (818 mg, 5.92 mmol) and the mixture was then warmed to 80° C. and stirred for 24 h. The resulting black mixture was cooled to RT, diluted with brine (100 mL) and extracted with ethyl acetate (3×50 mL). The combined ethyl acetate extracts were washed with saturated sodium bicarbonate (50 mL), water (50 mL) and brine (50 mL), dried (Na2SO4), concentrated in vacuo and purified via column chromatography to yield 2-chloro-5-(5-fluoropyridin-3-yloxy)benzenamine as a thick oil which was used without further purification. 1H-NMR (DMSO-d6): δ 5.57 (br s, 2H), 6.26-6.30 (dd, 1H), 6.50 (s, 1H), 7.19-7.22 (m, 1H), 7.45-7.50 (m, 1H), 8.26 (s, 1H), 8.39 (s, 1H). MS (ESI) m/z: 239.0 (M+H+).

1. temperaturethe mixture was then warmed to 80° C.
2. stirringstirred for 24 h
3. temperatureThe resulting black mixture was cooled to RT
4. extractionextracted with ethyl acetate (3×50 mL)
5. washThe combined ethyl acetate extracts were washed with saturated sodium bicarbonate (50 mL), water (50 mL) and brine (50 mL)
6. dry with materialdried (Na2SO4)
7. concentrationconcentrated in vacuo
8. custompurified via column chromatography

ORD record

ord-db4c25d1a4b9409c9617b130c284f504

Source dataset

uspto-grants-2010_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07790756B2