[C:1]([O:5][CH2:6][CH2:7][CH:8]1[CH2:12][CH2:11][O:10][C:9]1=[O:13])(C)(C)[CH3:2].C(O)(=[O:16])C>>[C:1]([O:5][CH2:6][CH2:7][CH:8]1[CH2:12][CH2:11][O:10][C:9]1=[O:13])(=[O:16])[CH3:2]In a stirred vessel, a mixture of 10 g of 3-(2'-tert-butoxyethyl)-dihydro-2(3H)furanone, 50 g of glacial acetic acid, and 5 g of Nafion is heated to 120° C. Following a period of 19 h, the reaction is terminated (conversion: 100%) and the catalyst is separated by filtration. Following purification by distillation, there is obtained 98% of 3-(2'-acetoxyethyl)-dihydro-2(3H)furanone.
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