反应详情

温度

100 °C

A mixture of 2-butyl-malonic acid (2.319 g, 14.482 mmol), 4-fluoro-3-methylbenzaldehyde (1.000 g, 7.241 mmol), and piperidine (1.232 g, 14.482 mmol) in 10 mL of pyridine was heated to 100° C. and stirred at this temperature for 16 h. After cooling to room temperature, the reaction mixture was poured into 25 mL of concentrated HCl containing 50 g of ice, and then extracted with ethyl acetate. The organic extracts were combined and dried over anhydrous Na2SO4, concentrated under reduced pressure, the product isolated by Flash chromatography (silica gel) eluting with 0-30% ethyl acetate/hexanes to give the title compound as yellow liquid (1.370 g, 80% yield). LC-MS: tR=9.5 min; m/z 237 (M+H)+.

1. temperatureAfter cooling to room temperature
2. extractionextracted with ethyl acetate
3. dry with materialdried over anhydrous Na2SO4
4. concentrationconcentrated under reduced pressure
5. customthe product isolated by Flash chromatography (silica gel)
6. washeluting with 0-30% ethyl acetate/hexanes