Trifluoroacetic acid → 5-(2-Amino-ethyl)-2-(5-trifluoromethyl-pyridin-2-yloxy)benzonitrile

関与物質

反応条件

反応手順

Entire reaction was performed under argon atmosphere using syringe septa technique. {2-[3-cyano-4-(5-trifluoromethyl-pyridin-2-yloxy)-phenyl]-ethyl}-carbamic acid tert-butyl ester (0.425 mmol, 1 eq) was dissolved in dichloromethane (1.5 ml) and stirred at 0° C. for 5 min. TFA (2.213 mmol, 5 eq) was added and stirring was continued for 2 hours. Reaction mixture was diluted with 10 ml NaHCO3 (sat.) and extraction with DCM (3×20 ml) followed. Organic layers were combined and evaporated in vacuo to give 5-(2-amino-ethyl)-2-(5-trifluoromethyl-pyridin-2-yloxy)benzonitrile (0.391 mmol, yield=92%, purity=80%). [M+H]+=308.29 1H NMR (300 MHz, CDCl3) δ/ppm 2.79 (br. s., 2H), 2.94-3.07 (m, 2H), 7.21 (br. s., 2H), 7.49 (d, J=8.9 Hz, 1H), 7.54 (br. s., 1H), 7.90-8.05 (m, 1H), 8.38 (br. s., 1H)

情報源と証拠