Sodium Hydroxide → HCID 46317179, compound

Temperature

140 °C

A stirred solution of 3-amino-5-bromo-benzotrifluoride (Apollo, England; 1.12 g, 5 mmol) and 3-(tri-n-butylstannyl)pyridine (Maybridge Chemical Co. Ltd., England; 2.0 g, 5.4 mmol) in xylene (30 mL) was purged with argon for 10 minutes at 20° C. Tetrakis(triphenylphosphine)-palladium (0) (1.16 g, 1.0 mmol) is then added and the resulting mixture is heated at 140° C. for 36 hours under an argon atmosphere. The mixture is then cooled, treated with an aqueous solution of sodium hydroxide (100 mL of 0.1 M) and purged with air for 2 hours. The resulting mixture is then diluted with ethylacetate (200 mL) and filtered. The organic phase is then sequentially washed with water (2×80 mL) and saturated aqueous sodium chloride (1×80 mL), dried (MgSO4), filtered and the solvent is evaporated off under reduced pressure to yield the crude product which is purified by column chromatography (silica gel, eluent ethyl acetate) to afford the title compound as a brown oil. 1H-NMR (400 MHz, DMSO-d6, δ): 5.73 (br s, 2H), 6.83 (dd, 1H), 6.99 (d, 1H), 7.04 (d, 1H), 7.39 (dd, 1H), 7.64 (d, 1H), 8.42 (m, 1H) and 8.53 (dd, 1H).

1. temperatureThe mixture is then cooled
2. custompurged with air for 2 hours
3. additionThe resulting mixture is then diluted with ethylacetate (200 mL)
4. filtrationfiltered
5. washThe organic phase is then sequentially washed with water (2×80 mL) and saturated aqueous sodium chloride (1×80 mL)
6. dry with materialdried (MgSO4)
7. filtrationfiltered
8. customthe solvent is evaporated off under reduced pressure
9. customto yield the crude product which
10. customis purified by column chromatography (silica gel, eluent ethyl acetate)

ORD record

ord-9d60fed11dcb4d1ab6acb48957d2e7a1

Source dataset

uspto-grants-2009_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07569566B2