[CH:1]1([CH:4]([C:11]2[CH:16]=[CH:15][CH:14]=[C:13]([CH2:17][OH:18])[CH:12]=2)[CH2:5][C:6]([O:8][CH2:9][CH3:10])=[O:7])[CH2:3][CH2:2]1.C(N(CC)CC)C.[CH3:26][S:27](Cl)(=[O:29])=[O:28].O>C1COCC1>[CH:1]1([CH:4]([C:11]2[CH:16]=[CH:15][CH:14]=[C:13]([CH2:17][O:18][S:27]([CH3:26])(=[O:29])=[O:28])[CH:12]=2)[CH2:5][C:6]([O:8][CH2:9][CH3:10])=[O:7])[CH2:2][CH2:3]1To a solution of ethyl 3-cyclopropyl-3-(3-(hydroxymethyl)phenyl)propanoate (690 mg) in THF (14 mL) were added triethylamine (775 μL) and methanesulfonyl chloride (258 μL) at 0° C., and the mixture was stirred at room temperature for 2 hr. The reaction mixture was cooled to 0° C., water was added, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure and the residue was purified by silica gel column chromatography (ethyl acetate/hexane) to give the title compound (934 mg) as a colorless oil.
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