Trifluoroacetic acid → (3R,6S)-3-Amino-6-(2,3-difluorophenyl)-1-(2,2,2-trifluoroethyl)azepan-2-one

関与物質

反応手順

Trifluoroacetic acid (2.5 mL) was added to a solution of tert-butyl (3R,6S)-6-(2,3-difluorophenyl)-2-oxo-1-(2,2,2-trifluoroethyl)azepan-3-ylcarbamate (135 mg, 0.320 mmol) in dichloromethane (5 mL). After 30 min, the solution was concentrated and azeotroped with toluene (2×). Saturated aqueous sodium bicarbonate solution was added and the mixture was extracted with dichloromethane (3×). The combined organic extracts were washed with saturated brine, dried over magnesium sulfate, filtered and concentrated. MS 323.1 (M+1). 1H NMR (500 MHz, CDCl3) δ 7.11-7.03 (m, 2H), 6.93-6.89 (m, 1H), 4.21-4.13 (m, 1H), 4.10-3.98 (m, 2H), 3.85 (d, J=11.0 Hz, 1H), 3.35 (d, J=15.4 Hz, 1H), 3.04-2.99 (m, 1H), 2.13-2.09 (m, 2H), 2.08-2.02 (m, 1H), 1.78-1.70 (m, 3H).

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