反应详情

A mixture of methyl 2-(bromomethyl)-5-chlorobenzoate-(200 mg, 0.80 mmol), cyclopentanol (379 mg 4.4 mmol), and potassium tert-butoxide (448 mg, 4.0 mmol) in tetrahydrofuran (8 mL) was stirred at room temperature for 3 hours. The mixture was acidified with 2 N hydrochloric acid and the acidic aqueous mixture was extracted with ethyl acetate. The organic layer was washed with brine, dried over sodium sulfate and evaporated. The residue was purified by flash column chromatography on silica gel eluting with hexane/ethyl acetate (1/1) to afford 100 mg (49%) of the title compound:

1. extractionthe acidic aqueous mixture was extracted with ethyl acetate
2. washThe organic layer was washed with brine
3. dry with materialdried over sodium sulfate
4. customevaporated
5. customThe residue was purified by flash column chromatography on silica gel eluting with hexane/ethyl acetate (1/1)