Sodium Chloride → HCID 68583578, compound

Temperature

80 °C

To a solution of 4-fluoro-3-hydroxy-benzoic acid ethyl ester (2.2 g, 11.95 mmol) in N,N-dimethylformamide (50 ml) was added 60% NaH in mineral oil (0.72 g, 17.93 mmol) and chloropyrazine (1.64 g, 14.34 mmol) and heated at 80° C. for overnight. One more equivalent of chloropyrazine was added and heated at the same temperature for 10 h. The reaction mixture was poured into a flask containing 150 ml of aqueous saturated NaCl solution and 0.6 ml of acetic acid. The mixture was extracted with ethyl acetate (3×100 ml), the combined organic extracts were washed with sat NaCl (150 ml), dried (Na2SO4), filtered and concentrated. The crude product was purified by flash column chromatography using dichloromethane to yield 1.55 g (50%) of product. MS (ESI+) m/z 263 (M+H)+;

1. temperatureheated at the same temperature for 10 h
2. additionThe reaction mixture was poured into a flask
3. extractionThe mixture was extracted with ethyl acetate (3×100 ml)
4. washthe combined organic extracts were washed with sat NaCl (150 ml)
5. dry with materialdried (Na2SO4)
6. filtrationfiltered
7. concentrationconcentrated
8. customThe crude product was purified by flash column chromatography

ORD record

ord-349c7e135c7141daa99e15d59c1eac91

Source dataset

uspto-grants-2010_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07704997B1