4-Bromophenol → 1-Bromo-4-(2,2,2-trifluoroethoxy)benzene

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a stirred solution of trifluoroethyl tosylate (1.5 g, 5.8 mmol) in DMF (20 mL) was added K2CO3 (4 g, 29.4 mmol) followed by addition of p-bromo phenol (1.1 g, 6.46 mmol) at RT under inert atmosphere. The reaction mixture was stirred at 120° C. for 6 h. The volatiles were evaporated under reduced pressure; the residue was diluted with water (5 mL) and extracted with ethyl acetate (3×30 mL). The organic layer was washed with water, brine and dried over anhydrous Na2SO4, filtered and concentrated in vacuo. The crude compound was purified by silica gel column chromatography eluting with 5% EtOAc/hexane to afford the desired product (0.8 g, 3.13 mmol, 53.3%) as semi solid. 1H NMR (200 MHz, CDCl3): □ 7.44-7.38 (m, 2H), 6.86-6.80 (m, 2H), 4.38-4.25 (m, 2H).

Herkunft & Nachweise