反应详情

温度

-70 °C

n-Butyllithium (14 mL, 2 M in pentane) was added dropwise to a solution of diisopropylamine (2.86 g, 28 mmol) in tetrahydrofuran (60 mL) cooled to −70° C. After 30 minutes of stirring at −70° C., the mixture was treated with 6-bromo-1-indanone (4.8 g, 22.7 mmol), prepared according to the procedure described in J. Org. Chem., 49:4226-423 (1984), in two portions over 5 minutes. After 10 minutes, the mixture was allowed to warm to −50° C. and was treated with ethyl bromoacetate (4.8 g, 28 mmol). The mixture was allowed to warm to −10° C. and was stirred at −10 to −15° C. for 1 hour. The reaction was quenched by careful addition of water (60 mL) followed by isopropyl acetate (60 mL). The organic layer was separated, washed with aqueous HCl (50 mL, prepared by adjusting the pH of water to 2 with conc. HCl), and then aqueous potassium carbonate (50 mL, 5%). The organic layer was concentrated under vacuum to provide the title compound which was used in the next step without further purification.

1. customprepared
2. wait, 49:4226-423 (1984), in two portions over 5 minutes
3. waitAfter 10 minutes
4. temperatureto warm to −50° C.
5. temperatureto warm to −10° C.
6. stirringwas stirred at −10 to −15° C. for 1 hour
7. customThe reaction was quenched by careful addition of water (60 mL)
8. customThe organic layer was separated
9. washwashed with aqueous HCl (50 mL
10. customprepared
11. concentrationThe organic layer was concentrated under vacuum