反应详情

温度

-78 °C

Diisopropyl amine (0.16 mL, 1.13 mmol) was dissolved in tetrahydrofuran (2 mL). n-Butyllithium (2.5M, 0.45 mL, 1.13 mmol) was added at 0° C. and the reaction stirred for 0.5 h. The solution was cooled to −78° C. and 1-(6-mesityl-pyridin-2-yl)-pentan-2-one (0.29 g, 1.0 mmol) was added. After 0.5 h, ethyl ethoxymethylene malonate (0.21 mL, 1.0 mmol) was added and the reaction was warmed to room temperature. The solution was quenched with water, extracted with ethyl acetate, dried, and concentrated. Flash chromatography (10%-20% ethyl acetate/hexanes) gave the title compound as a mixture of two isomers.

1. waitAfter 0.5 h
2. temperaturethe reaction was warmed to room temperature
3. customThe solution was quenched with water
4. extractionextracted with ethyl acetate
5. customdried
6. concentrationconcentrated