反应详情

(4-Hydroxy-tetrahydro-pyran-4-yl)-(6-trifluoromethyl-pyridin-3-yl)-acetonitrile (1.15 g, 4.02 mmol) was dissolved in thionyl chloride (50 mL, 600 mmol). One drop of DMF was added and the mixture was heated at reflux for 1 hour and then cooled to room temperature and concentrated in vacuo. The resulting crude product was purified by flash chromatography to yield 2-(dihydro-2H-pyran-4(3H)-ylidene)-2-(6-(trifluoromethyl)pyridin-3-yl)acetonitrile (1.04 g, 3.9 mmol, 95%).

1. temperaturethe mixture was heated
2. temperatureat reflux for 1 hour
3. concentrationconcentrated in vacuo
4. customThe resulting crude product was purified by flash chromatography