Ethanol → HCID 67609650、化合物

反応式

[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].[Br:16]N1C(=O)CCC1=O>ClCCl>[CH2:1]([O:3][C:4](=[O:12])[C:5]([C:7]1([Br:16])[CH2:11][CH2:10][O:9][CH:8]1[O:15][CH2:13][CH3:14])=[O:6])[CH3:2]

参加物

反応条件

温度: 7.5 °C

実験手順

Ethyl-2-(4,5-dihydrofuran-3-yl)-2-oxoacetate (100 g) was dissolved in dichloromethane (500 ml) and Ethanol (150 ml) was added to reaction mass and then reaction mass was cooled to 5 to 10° C. N-bromosuccinimide (115 g) was added lot wise by maintaining temp below 10° C. Reaction mass was then stirred at 20-30° C. till completion of reaction. Reaction mass was washed with sodium bicarbonate solution (8%, 3×400 ml). Reaction mass was then concentrated to residue to get Ethyl-2-(3-bromo-2-ethoxytetrahydrofuran-3-yl)-2-oxoacetate (Yield 170 g).