[O:1]1[CH2:6][CH2:5][CH:4]([CH2:7][C:8]([OH:10])=[O:9])[CH2:3][CH2:2]1.[CH2:11](O)[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1.C(N(CC)CC)C.CCCCCC.C(OCC)(=O)C>ClCCl.O>[O:1]1[CH2:6][CH2:5][CH:4]([CH2:7][C:8]([O:10][CH2:11][C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)=[O:9])[CH2:3][CH2:2]1
To a solution of 2-(tetrahydropyran-4-yl)acetic acid (325 mg, 2.26 mmol) in anhydrous dichloromethane (10 mL) were added benzyl alcohol (439 mg, 2.94 mmol), 1-ethyl-3-(3-dimethylammoniumpropyl)carbodiimide hydrochloride (564 mg, 2.94 mmol) and triethylamine (297 mg, 2.94 mmol) at room temperature, and the mixture was stirred for 12 h. The reaction mixture was diluted with water (1 mL) to separate the phases, and the organic layer was further washed with water (1 mL) and brine (1 mL). The organic layer was concentrated under reduced pressure, and the residue thus obtained was subjected to silica gel column chromatography (hexane-ethyl acetate 7:1) to give 172 mg of the title compound as oil (yield: 32%).
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