反应详情

To a solution of di-i-propylamine (0.77 ml, 5 mmoles) in tetrahydrofuran (10 ml) at -78° C. was added n-butyl lithium (2.1 ml, 5.5 mmoles) under argon atmosphere. After 15 minutes, methyl methoxyacetate (0.52 g, 5 mmoles) in tetrahydrofuran (2 ml) was added dropwise, with stirring. The resulting enolate solution was stirrred at -78° C. for 45 minutes. A solution of 2-dodecylbenzaldehyde (1.65 g, 6 mmoles) in tetrahydrofuran (2 ml) was added. The resulting light-blue mixture became a suspension after 1.5 hours. The reaction mixture was quenched with saturated ammonium chloride solution, diluted with ether and ice-water. The aqueous phase was extracted with ether. The combined organic extract was washed with saturated sodium chloride solution, dried over magnesium sulfate, and evaporated to give the product, which was purified by flash column chromatography (silica, 15% ethyl acetate/hexane). The fractions were pooled to give 620 mg (33%).

1. customafter 1.5 hours
2. customThe reaction mixture was quenched with saturated ammonium chloride solution
3. additiondiluted with ether and ice-water
4. extractionThe aqueous phase was extracted with ether
5. extractionThe combined organic extract
6. washwas washed with saturated sodium chloride solution
7. dry with materialdried over magnesium sulfate
8. customevaporated
9. customto give the product, which
10. customwas purified by flash column chromatography (silica, 15% ethyl acetate/hexane)
11. customto give 620 mg (33%)