反应详情

To an oven-dried 3-necked 25 mL RB flask under nitrogen was added CH2Cl2 (3.5 mL) and 1 M diethylzinc solution in hexane (3.43 mL, 3.43 mmol). The flask was cooled in an ice-bath and a solution of trifluoroacetic acid (0.391 g, 3.43 mmol) in CH2Cl2 (1 mL) was added dropwise via syringe. After stirring for 15 min, a solution of diiodomethane (0.918 g, 3.43 mmol) in CH2Cl2 (1 mL) was added. The reaction mixture was stirred at rt for 15 min, followed by addition of (S)—N—((R)-1-(4-fluoro-3-(vinyloxy)phenyl)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-2-phenylethyl)-2-methylpropane-2-sulfinamide (0.495 g, 0.87 mmol) in CH2Cl2 (1 mL). The reaction mixture was allowed to warm to rt and stirred for 4 h. The reaction mixture was diluted with CH2Cl2 and washed successively with sat. sodium bicarbonate, water, sat. NaCl, dried over MgSO4, filtered and concentrated under reduced pressure. The residue was purified by ISCO using a gradient of 5-70% EtOAc/hexane as eluent to yield (S)—N—((R)-1-(3-cyclopropoxy-4-fluorophenyl)-1-(3-fluoro-5-(1,1,2,2-tetrafluoroethoxy)phenyl)-2-phenylethyl)-2-methylpropane-2-sulfinamide as a white foam (0.347 g, 71% yield). HPLC: RT=3.668 min [M+H] 586.3 (Phenomenex Luna C18 5μ column, eluting with 10-90% aqueous acetonitrile containing 0.1% trifluoroacetic acid over a 4 minute gradient, monitoring at 220 nm). 1H NMR (CDCL3) ppm 7.2-7.05 (m, 6H), 6.91 (d, J=6.6 Hz, 2H), 6.83 (d, J=8.4 Hz, 1H), 6.71 (m, 2H), 5.84 (t, J=53.1 Hz, 1H), 4.21 (s, 1H), 3.99 (d, J=12.3 Hz, 1H), 3.62 (m, 1H), 3.56 (d, J=12.8 Hz, 1H), 1.22 (s, 9H), 0.72-0.65 (m, 4H).

1. temperatureThe flask was cooled in an ice-bath
2. stirringThe reaction mixture was stirred at rt for 15 min
3. stirringstirred for 4 h
4. washwashed successively with sat. sodium bicarbonate, water, sat. NaCl
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customThe residue was purified by ISCO