Sodium Bicarbonate → 4-Amino-2-chloro-3-fluorobenzonitrile

A mixture of N-(4-bromo-3-chloro-2-fluorophenyl)acetamide (17.0 g) and copper(I) cyanide (5.88 g) in N,N-dimethylformamide was stirred at 150° C. overnight. After warming to room temperature, water was added, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over magnesium sulfate, and the solvent was evaporated under reduced pressure to give N-(3-chloro-4-cyano-2-fluorophenyl)acetamide. Ethanol (250 ml)-concentrated hydrogen chloride (26.6 mL) was added to N-(3-chloro-4-cyano-2-fluorophenyl)acetamide, and the mixture was refluxed overnight. The mixture was ice-cooled, and neutralized with saturated aqueous sodium hydrogen carbonate solution, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over magnesium sulfate, and the solvent was evaporated under reduced pressure. The obtained residue was purified by column, and the obtained solid was washed with hexane to give the title compound as a pale-yellow solid (yield: 7.0 g, 64%).

1. temperaturethe mixture was refluxed overnight
2. temperaturecooled
3. extractionthe mixture was extracted with ethyl acetate
4. washThe organic layer was washed with saturated brine
5. dry with materialdried over magnesium sulfate
6. customthe solvent was evaporated under reduced pressure
7. customThe obtained residue was purified by column
8. washthe obtained solid was washed with hexane

ORD-Eintrag

ord-c270f94c9e36417ca8e2e29786729cfc

Quelldatensatz

uspto-grants-2010_11

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07834051B2