反应详情

温度

-78 °C

Lithium hexamethyldisilazide solution (8.39 mL of 1M in tetrahydrofuran, 8.39 mmol) was added to dry THF and cooled to −78° C. Methyl phenylacetate (1.15 mL, 7.99 mmol) was added dropwise, and the reaction stirred for 15 minutes. A solution of 1-benzyl-5-ethoxy-3,4-dihydro-2H-pyrrolium tetrafluoroborate in 5 mL of tetrahydrofuran was added dropwise, and after one hour the reaction was allowed to warm to room temperature. The mixture was quenched with saturated NaHCO3 solution, warmed to ambient temperature and poured into water. The aqueous layer was extracted with EtOAc and the organic extract was washed with brine, dried with Na2SO4, filtered and concentrated in vacuo. The residue was purified by silica gel chromatography (25-30% EtOAc/hexane), providing methyl 2-(1-benzylpyrrolidin-2-ylidene)(phenyl)acetate. ESI+MS: 308.3 [M+H]+.

1. waitafter one hour the reaction was allowed
2. temperatureto warm to room temperature
3. customThe mixture was quenched with saturated NaHCO3 solution
4. temperaturewarmed to ambient temperature
5. additionpoured into water
6. extractionThe aqueous layer was extracted with EtOAc
7. extractionthe organic extract
8. washwas washed with brine
9. dry with materialdried with Na2SO4
10. filtrationfiltered
11. concentrationconcentrated in vacuo
12. customThe residue was purified by silica gel chromatography (25-30% EtOAc/hexane)