Water → 3-(3-Cyclopentyloxy-4-methoxyphenyl)-3-ethynylcyclohexan-1-one

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A mixture of potassium fluoride (900 mg, 15.6 mmol) and 3-(3-cyclopentyloxy-4-methoxyphenyl)-3-trimethylsilylethynylcyclohexan-1-one (0.3 g, 0.78 mmol) were stirred in dry N,N-dimethylformamide (3 mL) under an argon atmosphere. After 18 h, the solvent was removed in vacuo, the residue was partitioned between water and ethyl acetate, the aqueous layer was extracted twice with ethyl acetate, the combined extract was dried (magnesium sulfate) and was evaporated. Purification by flash chromatography, eluting with 4:1 hexanes/ethyl acetate provided a clear colorless oil. Anal. (C20H24O3.1/10 H2O) calcd: C 76.45, H 7.76; found: C 76.32, H 7.60.

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