[CH3:1][O:2][C:3](=[O:10])[CH:4](Br)[CH2:5][CH2:6][CH2:7][CH3:8].[F:11][C:12]1[CH:17]=[CH:16][C:15]([OH:18])=[CH:14][C:13]=1[CH3:19].C([O-])([O-])=O.[K+].[K+]>CN(C=O)C.O>[CH3:1][O:2][C:3](=[O:10])[CH:4]([O:18][C:15]1[CH:16]=[CH:17][C:12]([F:11])=[C:13]([CH3:19])[CH:14]=1)[CH2:5][CH2:6][CH2:7][CH3:8]To a solution of 2-bromo-hexanoic acid methyl ester (0.500 g, 2.404 mmol) and 4-fluoro-3-methylphenol (0.303 g, 2.404 mmol) in 15 mL of DMF, was added K2CO3 (1.661 g, 12.020 mmol). After stirring at room temperature under N2 for 88 h, the reaction mixture was diluted with 60 mL of water and extracted with dichloromethane (60 mL×3). The organic extracts were combined and dried over anhydrous Na2SO4. After removing the solvent under reduced pressure, the product was isolated by Flash chromatography (silica gel) eluting with 0-20% ethyl acetate/hexanes to give the title compound as yellow oil (0.467 g, 76% yield). LC-MS: tR=10.5 min; m/z 255 (M+H)+.
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