反応式
C([O:3][C:4](=[O:18])[C:5]1[CH:15]=[C:14]([OH:16])[C:8]([C:9]([O:11]CC)=[O:10])=[CH:7][C:6]=1[OH:17])C.Cl>[OH-].[Na+]>[OH:16][C:14]1[CH:15]=[C:5]([C:4]([OH:18])=[O:3])[C:6]([OH:17])=[CH:7][C:8]=1[C:9]([OH:11])=[O:10]参加物
4
実験手順
Diethyl-1,4-cyclohexanedione-2,5-dicarboxylate is reacted with bromine in cold sulfuric acid (0°-10° C.) to provide the aromatized product, diethyl-2,5-dihydroxyterephthalate. Hydrolysis of the diethyl-2,5-dihydroxyterephthalate by refluxing in aqueous sodium hydroxide followed by acidification with HCl provides 2,5-dihydroxyterephthalic acid. The diacid may be converted to the diacid halide by reaction with thionyl halide in diethyl ether.
出典と根拠
- ORDレコード
- ord-dbca8c89d1c24995b4a60905b3a9f00e
- 出典データセット
- uspto-grants-1992_04
- 特許番号
- US05106940
関連ノート
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