[CH2:1]([O:3][C:4](=[O:12])[C:5]([C:7]1[CH2:11][CH2:10][O:9][CH:8]=1)=[O:6])[CH3:2].[CH2:13]([OH:15])[CH3:14]>ClCCl>[CH2:1]([O:3][C:4](=[O:12])[C:5]([CH:7]1[CH2:11][CH2:10][O:9][CH:8]1[O:15][CH2:13][CH3:14])=[O:6])[CH3:2]Ethyl-2-(4,5-dihydrofuran-3-yl)-2-oxoacetate (10 g) was dissolved in Ethanol (50 ml) and Dichloromethane (50 ml). The reaction mass was stirred at 40-50° C. for 12 hrs. Reaction mass was concentrated to residue under vacuum at 40° C. Residue was dissolved in dichloromethane (50 ml) and washed with water (50 ml). Reaction mass was concentrated to residue to get ethyl-2-(2-ethoxytetrahydrofuran-3-yl)-2-oxoacetate (Yield 9.9 g).
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