反应详情

A mixture of 18.5 g (80 mmol) 3-(3,4-dichloro-phenyl)-dihydro-furan-2-one, 3.84 g (88 mmol) NaH (55% suspension) and 14.2 g (100 mmol) iodomethane in 300 mL THF was stirred for 64 h at room temperature. NH4Cl aq. sat. was added and the mixture was extracted with ethyl acetate. The organic phases were washed with NaCl aq. sat. dried with Na2SO4, filtered and evaporated to dryness. The residue was purified by flash column chromatography on silica eluting with a gradient formed from ethyl acetate and heptane. The product containing fractions were evaporated to yield 16 g (82%) of the title compound as yellow oil. MS(m/e): 246.0 (MH+).

1. extractionthe mixture was extracted with ethyl acetate
2. washThe organic phases were washed with NaCl aq.
3. dry with materialsat. dried with Na2SO4
4. filtrationfiltered
5. customevaporated to dryness
6. customThe residue was purified by flash column chromatography on silica eluting with a gradient
7. customformed from ethyl acetate and heptane
8. additionThe product containing fractions
9. customwere evaporated