反应详情

A solution of diisopropylamine (15 mL) in anhydrous tetrahydrofuran (100 mL) was cooled at −50° C. and 1.6 M n-butyllithium/hexane solution (69 mL) was added dropwise with stirring. After completion of dropwise addition, the mixture was stirred for 10 min and a solution of γ-picoline (20 g) in anhydrous tetrahydrofuran (10 mL) was added dropwise at −30° C. The mixture was stirred for 1 h and a solution of N-(2-chlorobenzoyl)propyleneimine (20 g) in anhydrous tetrahydrofuran (10 mL) was added dropwise at −10° C. After completion of dropwise addition, the mixture was stirred for at room temperature for 2 h. To the reaction mixture was added water (100 mL) and the mixture was extracted with ethyl acetate. The extract was washed with water, and after drying, the solvent was evaporated. The residue was purified by silica gel column chromatography (hexane-ethyl acetate=1:1) to give the title compound (16 g, yield 71%). oil.

1. additionAfter completion of dropwise addition
2. stirringthe mixture was stirred for 10 min
3. stirringThe mixture was stirred for 1 h
4. additionAfter completion of dropwise addition
5. stirringthe mixture was stirred for at room temperature for 2 h
6. extractionthe mixture was extracted with ethyl acetate
7. washThe extract was washed with water
8. customafter drying
9. customthe solvent was evaporated
10. customThe residue was purified by silica gel column chromatography (hexane-ethyl acetate=1:1)