反应详情

温度

-20 °C

2-(6-Chloro-3-nitropyridin-2-yl)-1,2,3,4-tetrahydroisoquinoline (16 g, 56.6 mmol) prepared in Preparation 7 was dissolved in anhydrous tetrahydrofuran (300 ml) under a nitrogen atmosphere. 1-Methyl-1-propenyl magnesium bromide (0.5M in tetrahydrofuran solution, 283 ml, 141.5 mmol) was slowly added at −78° C. to the solution. The reaction mixture was stirred for 2 hours at −20° C. and then 20% (w/v) ammonium chloride solution was added thereto. The reaction mixture was extracted with ethyl acetate and then concentrated under reduced pressure. The resulting residue was purified with silica gel column chromatography (ethyl acetate/n-hexane=1/10, v/v) to give 7.8 g of the titled compound as yellow oil. (Yield: 45%)

1. extractionThe reaction mixture was extracted with ethyl acetate
2. concentrationconcentrated under reduced pressure
3. customThe resulting residue was purified with silica gel column chromatography (ethyl acetate/n-hexane=1/10