p-Toluenesulfonic acid monohydrate → 2-(4-isopropenylphenyl)-N-{(1R)-1-[5-(2,2,2-trifluoroethoxy)pyridin-2-yl]ethyl}acetamide

関与物質

反応条件

反応手順

A mixture of 2-[4-(1-hydroxy-1-methylethyl)phenyl]-N-{(1R)-1-[5-(2,2,2-trifluoroethoxy)pyridin-2-yl]ethyl}acetamide (400 mg, 1.01 mmol) and p-toluenesulfonic acid monohydrate (38.4 mg, 0.202 mmol) in toluene (4.5 mL) was heated at 100° C. in a sealed tube for 6 h. The mixture was cooled to room temperature, diluted with CH2Cl2 (40 mL) and washed with water (2×50 mL). The organic layer was dried over MgSO4, concentrated and purified by normal phase chromatography (20-100% EtOAc/Hexanes) to give 316 mg (83%) of 2-(4-isopropenylphenyl)-N-{(1R)-1-[5-(2,2,2-trifluoroethoxy)pyridin-2-yl]ethyl}acetamide as a white solid. 1H NMR (CDCl3, 400 MHz) 8.21 (d, J=2.35 Hz, 1H), 7.45 (m, 2H), 7.20 (m, 4H), 6.64 (d, J=7.32 Hz, 1H), 5.38 (s, 1H), 5.11 (m, 1H), 5.09 (s, 1H), 4.37 (q, J=7.94 Hz, 2H), 3.58 (s, 2H), 2.15 (s, 3H), 1.39 (d, J=6.77 Hz, 3H); MS (Electrospray): m/z 379.5 (M+H).

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