Hydrochloric Acid → Ethyl 3-nitro-4-(trifluoromethyl)benzoate

참여 물질

반응 단계

A solution of 555 mg (2.36 mmol) of 3-nitro-4-(trifluoromethyl)benzoic acid (from Step B) in 10 mL of ethanol was treated with 1 mL of concentrated hydrochloric acid. The solution was stirred at reflux for 2 days, then cooled, and partitioned between ethyl acetate and H2O. The organic layer was washed successively with saturated NaHCO3, H2O, and brine. The ethyl acetate solution was then dried over Na2SO4 and concentrated to give 400 mg (64%) of the title compound as a pale yellow foam, homogeneous by TLC in 4:1 hexane-EtOAc; mass spectrum (EI) m/e 263 (M+). 200 MHz 1H NMR (CDCl3) δ1.43 (t, J=7.2 Hz, 3H), 4.46 (q, J=7.2 Hz, 2H), 7.92 (d, J=8 Hz, 1H), 8.36 (d, J=8 Hz, 1H), 8.49 (s, 1H).

출처 및 근거