反应详情

{2-[4-(4-Chloro-3-trifluoromethyl-phenoxy)-phenyl]-ethyl}-carbamic acid tert-butyl ester (1.08 g, 2.51 mmol, 1 eq) was dissolved in dry DCM (10 ml) under argon atmosphere and TFA (961 μl, 5 eq) was added. Reaction mixture was stirred for overnight. In the reaction mixture was added more DCM (15 ml) and was extracted with saturated NaHCO3 (3×15 ml) and brine. Organic layer was dried over anhydrous Na2SO4, filtered and evaporated to give a crude product. Crude product was purified via Biotage SP-1 Snap Si 25 g; 25 ml/min; UV Wavelength (Collection: 254 nm; Monitor: 290 nm) in the gradient of MeOH in DCM: 2% for 1.5 CV, 2-10% for 20 CV. The appropriate fractions were combined and product 2-[4-(3-trifluoromethyl-phenoxy)-phenyl]-ethylamine (501 mg, yield=58.1%, purity 96%). [M+H]+=330.75 1H NMR (300 MHz; CDCl3) δ/ppm 2.47 (s, 3H), 2.78-2.92 (m, 4H), 6.91-7.10 (m, 3H), 7.19-7.33 (m, 3H), 7.41 (d, J=8.99 Hz, 1H)

1. customReaction mixture
2. extractionwas extracted with saturated NaHCO3 (3×15 ml) and brine
3. dry with materialOrganic layer was dried over anhydrous Na2SO4
4. filtrationfiltered
5. customevaporated