反应详情

温度

0 °C

(E)-2-(2-Bromo-4-(4,4,4-trifluoro-3-(3,4,5-trichlorophenyl)but-1-en-1-yl)phenyl)-4,4-dimethyloxazol-5(4H)-one: A 25 mL round bottomed flask was charged with (E)-2-(2-bromo-4-(4,4,4-trifluoro-3-(3,4,5-trichlorophenyl)but-1-en-1-yl)benzamido)-2-methylpropanoic acid (400 mg, 0.70 mmol), CH2Cl2 (10 mL) and stirred at 0° C. EDC.HCl (134 mg, 0.70 mmol) was added in one portion as a solid and the reaction mixture was allowed to warm toward ambient temperature and continued to stir for 1 h. The reaction was diluted with CH2Cl2, washed with brine, dried over MgSO4, filtered and evaporated to give a dark oil. The crude product was purified via flash chromatography eluting with 50% hexanes/CH2Cl2 to afford the title compound as an off white foam (220 mg, 57): 1H NMR (400 MHz, CDCl3) δ 7.76 (d, J=8.1 Hz, 1H), 7.73 (d, J=1.6 Hz, 1H), 7.42 (d, J=7.8 Hz, 3H), 6.56 (d, J=15.9 Hz, 1H), 6.45 (dd, J=15.9, 7.7 Hz, 1H), 4.12 (p, J=8.5 Hz, 1H), 1.57 (s, 6H); 19F NMR (376 MHz, CDCl3) δ −68.55; ESIMS m/z 554 ([M−H]−).

1. temperatureto warm toward ambient temperature
2. stirringto stir for 1 h
3. washwashed with brine
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. customevaporated
7. customto give a dark oil
8. customThe crude product was purified via flash chromatography
9. washeluting with 50% hexanes/CH2Cl2