反应详情

温度

-65 °C

To a solution of 2-(6-chloro-3-pyridinyl)acetonitrile (4.3 g, 28 mmol, purchased from Matrix Scientific, Columbia, S.C., USA) and methyl acrylate (4.8 g, 56 mmol) in dry THF (150 mL) cooled to −65° C. was added solid potassium tert-butoxide (7.9 g, 70 mmol) under nitrogen atmosphere. The reaction mixture was stirred at −65° C. for 45 minutes. The reaction mixture was then acidified with 3 N HCl and extracted with DCM (3×150 mL). The combined organic layer was dried over sodium sulfate, filtered and concentrated under reduced pressure to give crude 5-(6-chloro-pyridin-3-yl)-5-cyano-2-hydroxy-cyclohex-1-enecarboxylic acid methyl ester which was used in the next step without purification (6.0 g, 75%).

1. extractionextracted with DCM (3×150 mL)
2. dry with materialThe combined organic layer was dried over sodium sulfate
3. filtrationfiltered
4. concentrationconcentrated under reduced pressure