反应详情

3-(4-Chloro-3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazole (0.1 g, 1.0 eq.) was dissolved in DMF (5 mL). DABCO (0.071 g, 2 eq.) was added and stirred for 30 min. (Z)-1-(3,3-difluoroazetidin-1-yl)-3-iodoprop-2-en-1-one (0.095 g, 1.1 eq.) was then added. The reaction mixture was stirred at room temperature for 5 h and then poured into iced water (50 mL). Product was extracted with EtOAc (3×15 mL). The combined organic layers was washed with brine, (20 mL), dried over Na2SO4, filtered, and concentrated by rotary evaporation (25° C., 20 mmHg) to afford 0.150 g of crude product, which was purified by chromatography to obtain (Z)-3-(3-(4-chloro-3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)-1-(3,3-difluoroazetidin-1-yl)prop-2-en-1-one (0.004 g, 3% yield). 1H NMR (400 MHz, DMSO) δ=9.32 (s, 1H), 8.46 (s, 1H), 8.32 (s, 1H), 7.47-7.49 (d, J=10.4 Hz, 1H), 6.00-5.04 (d, J=10.4 Hz, 1H), 4.55-4.58 (m, 2H), 4.33-4.36 (m, 2H) LCMS calcd for C16H10ClF8N4O [M+H]+: 461.7. Found: 461.14, at 2.99 min retention time.

1. additionwas then added
2. extractionProduct was extracted with EtOAc (3×15 mL)
3. washThe combined organic layers was washed with brine, (20 mL)
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated by rotary evaporation (25° C., 20 mmHg)
7. customto afford 0.150 g of crude product, which
8. customwas purified by chromatography