Bromide ion → HCID 66771001, compound

2-(2,4-dichloro-5-fluorophenyl)acetonitrile (1 g, 4.9 mmol, Eq: 1.00) was dissolved in toluene (4 mL). 1,2-Dibromoethane (1.38 g, 634 μL, 7.35 mmol, Eq: 1.50), aqueous NaOH-solution (4.31 mL, 12.5 M; 53.9 mmol, Eq: 11.0) and tertrabutylammonium bromide (348 mg, 1.08 mmol, Eq: 0.22) were added to the above suspension and vigorously stirred at RT for 4 h. The reaction mixture was diluted with water and extracted with AcOEt. The organic solution was washed with 1 N aqueous HCl, then with brine, dried over Na2SO4, filtered and evaporated to dryness. The crude material was purified by flash chromatography (silica gel, 50 g, 0% to 50% EtOAc in heptane) to yield example 461a) (1.13 g; 100%) as an off-white solid. 1H-NMR (CDCl3, 250 MHz) δ [ppm]: 7.51 (1 proton, d, 6.7 Hz); 7.16 (1, proton, d; 8.9 Hz); 1.76-1.80 (2 protons, m); 1.31-1.36 (2 protons, m)

1. extractionextracted with AcOEt
2. washThe organic solution was washed with 1 N aqueous HCl
3. dry with materialwith brine, dried over Na2SO4
4. filtrationfiltered
5. customevaporated to dryness
6. customThe crude material was purified by flash chromatography (silica gel, 50 g, 0% to 50% EtOAc in heptane)
7. customto yield example 461a) (1.13 g; 100%) as an off-white solid

ORD record

ord-db4f08f6b2a3422e810474f7fe6e69ac

Source dataset

uspto-grants-2012_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08163793B2