[CH3:1][O:2][C:3](=[O:11])[C:4]1[CH:9]=[CH:8][C:7]([OH:10])=[CH:6][CH:5]=1.[Na+].[I-].C([O-])([O-])=O.[K+].[K+].Br[CH2:21][CH:22]1[CH2:24][CH2:23]1>CC(C)=O>[CH3:1][O:2][C:3](=[O:11])[C:4]1[CH:9]=[CH:8][C:7]([O:10][CH2:21][CH:22]2[CH2:24][CH2:23]2)=[CH:6][CH:5]=14-hydroxy-benzoic acid methyl ester (2.0 g, 13.1 mmol, 1.2 eq) was dissolved in acetone (20 mL), NaI (0.97 g, 6.5 mmol, 0.5 eq) and K2CO3 (3.0 g, 21.8 mmol, 2.0 eq) were added and the mixture was stirred at room temperature for 20 min. (Bromomethyl)cyclopropane (1.1 mL, 10.3 mmol, 1.0 eq) was added, and the reaction was refluxed for 2 days. The solvent was concentrated under reduced pressure, NaOH 10% was added, and the product was extracted with DCM. The organic phase was dried over Na2SO4 and the solvent evaporated under reduced pressure. The title product (1.23 g, yield 79%) was recovered and used without further purification.
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