Sulfuric Acid → Methyl 1-(4-fluorophenyl)cyclopentanecarboxylate

Reaktionsgleichung

C[CH:2]1[CH2:6][CH2:5][CH2:4][C:3]1([C:10]1[CH:15]=[CH:14][C:13]([F:16])=[CH:12][CH:11]=1)[C:7]([OH:9])=[O:8].S(=O)(=O)(O)O.[C:22](=O)([O-])[O-].[Na+].[Na+]>CO>[F:16][C:13]1[CH:14]=[CH:15][C:10]([C:3]2([C:7]([O:9][CH3:22])=[O:8])[CH2:4][CH2:5][CH2:6][CH2:2]2)=[CH:11][CH:12]=1

Komponenten

Versuchsvorschrift

To a solution of methyl 1-(4-fluorophenyl)cyclopentanecarboxylic acid (5.0 g, 24.01 mmol) in anhydrous methanol was added 1 mL of the concentration of sulfuric acid. The mixture was refluxed for overnight. The mixture was neutralized to pH 4-5 with sodium carbonate. The solvent was evaporated. The residue was dissolved in ethyl acetate (50 mL), washed with brine (3×10 mL), dried over MgSO4. The crude product was used for the next reaction without further purification.