反应详情

(4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-4-methyl-3-[2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5-(trifluoromethyl)benzyl]-1,3-oxazolidin-2-one-methane (1.30 g, 2.18 mmol) (INTERMEDIATE 9), the title compound from Step B (1.30 g, 3.25 mmol), tetrakis(triphenylphosphine)palladium (250 mg, 10% mol) and sodium carbonate (507 mg, 4.79 mmol) in 50 ml of water/EtOH/toluene (1:2:4) was heated to reflux for 4 h. TLC (CH2Cl2:hexane/1:1) showed that the reaction was complete. The solvents were removed. Water (20 ml) was added. The organic was extracted with methylene chloride (3×30 ml). The combined methylene chloride layers were washed with brine, and dried over sodium sulfate. The title compound was obtained after flash column using CH2Cl2:hexane/8:2 as the elute. 1H NMR (CDCl3, 500 MHz): δ a mixture of 1:1 atopoisomers 7.98 (d, J=4.5 Hz, 1H), 7.89 (s, 2H), 7.68 (m, 4H), 7.42 (t, J=6.0 Hz, 1H), 7.30 (d, J=7.5 Hz, 0.5H), 7.26 (d, J=7.5 Hz, 0.5H), 7.07 (t, J=8.0 Hz, 1H), 6.87 (d, J=5.5 Hz, 0.5H), 6.85 (d, J=6.0 Hz, 0.5H), 5.63 (d, J=8.0 Hz, 0.5H), 5.41 (d, J=8.0 Hz, 0.5H), 5.00 (d, J=15.5 Hz, 0.5H), 4.92 (d, J=16.0 Hz, 0.5H), 4.17 (d, J=15.5 Hz, 0.5H), 3.95 (d, J=16.0 Hz, 0.5H), 3.95 (s, 3H), 3.88 (s, 3H), 3.84(m, 1H), 2.32 (s, 1.5H), 2.28 (s, 1.5H), 0.64 (d, J=7.0 Hz, 1.5H), 0.62 (d, J=6.5 Hz, 1.5H). LC/MS M+744.2

1. temperatureto reflux for 4 h
2. customThe solvents were removed
3. additionWater (20 ml) was added
4. extractionThe organic was extracted with methylene chloride (3×30 ml)
5. washThe combined methylene chloride layers were washed with brine
6. dry with materialdried over sodium sulfate