Sodium Hydroxide → 2-Amino-4-bromo-6-fluorophenol

Temperature

80 °C

A mixture of 4-bromo-2-fluoro 6-nitrophenol(1 g, 4.2 mmol) and tin (II) chloride (4.78 g, 21.2 mmol) in ethanol(50 mL) was heated at 80° C. under argon. After 2 hours, the starting material had disappeared and the solution was allowed to cool down and then poured into ice. The pH was made slightly basic (pH7-8), by addition of solid NaOH, before being extracted with ethyl acetate. The organic phase was washed with brine, dried over MgSO4 and filtered. The solvent was evaporated and chromatography of the resulting solid on silica gel (4% MeOH/CH2Cl2) gave the desired product(710 mg, 82%). 1H NMR (CD3OD): δ 6.51-6.40 (m, 2H).

1. temperatureto cool down
2. additionpoured into ice
3. extractionbefore being extracted with ethyl acetate
4. washThe organic phase was washed with brine
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. customThe solvent was evaporated

ORD record

ord-7de3650992bc48f8b8d58fa471c3c4ba

Source dataset

uspto-grants-1999_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05886044