Sodium Carbonate → 4-Bromo-4'-(trifluoromethyl)biphenyl

温度

100 °C

A 250 mL flask was charged with 4-(trifluoromethyl)phenylboronic acid (4.85 g, 25.5 mmol), 4-bromoiodobenzene (7.22 g, 25.5 mmol), Pd(OAc)2 (57.2 mg, 0.255 mmol) and sodium carbonate (5.41 g, 51.0 mmol). The flask was flushed with nitrogen, then n-propanol (40 mL) and water (8 mL) were added. The mixture was stirred at 100° C. overnight. The reaction mixture was cooled to room temperature and diluted with water. The mixture was extracted with ethyl acetate. The organic layer was washed with brine, dried over Na2SO4, and concentrated under reduced pressure. The crude residue was purified by silica gel chromatography to provide 4-bromo-4′-(trifluoromethyl)biphenyl (5.4 g, 70%) as a colorless solid. 1H NMR (400 MHz, CDCl3) δ 7.62-7.73 (m, 4H), 7.57-7.61 (m, 2H), 7.43-7.47 (m, 2H).

1. customThe flask was flushed with nitrogen
2. additionn-propanol (40 mL) and water (8 mL) were added
3. temperatureThe reaction mixture was cooled to room temperature
4. additiondiluted with water
5. extractionThe mixture was extracted with ethyl acetate
6. washThe organic layer was washed with brine
7. dry with materialdried over Na2SO4
8. concentrationconcentrated under reduced pressure
9. customThe crude residue was purified by silica gel chromatography

ORDレコード

ord-fb26d45eb4dd4d37b2a6d79b0db8319d

出典データセット

uspto-grants-2015_01

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08933104B2