Methanol → Methyl 5-(4-chlorophenyl)furan-2-carboxylate
反応式
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[O:12][C:11]([C:13]([OH:15])=[O:14])=[CH:10][CH:9]=2)=[CH:4][CH:3]=1.[CH3:16]O>OS(O)(=O)=O>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[O:12][C:11]([C:13]([O:15][CH3:16])=[O:14])=[CH:10][CH:9]=2)=[CH:6][CH:7]=1参加物
4
反応条件
- 温度
- 50 °C
実験手順
To a solution of 5-(4-chlorophenyl)-2-furoic acid (5.0 g, 22 mmol) in MeOH (50 mL) was added conc. H2SO4 (4 drops) and the resulting solution heated to 50° C. for 4 days. The reaction was cooloed and concentrated in vacuo. The residue was taken up in EtOAc (100 mL) and washed with saturated aqueous NaHCO3 (2×20 mL), dried (MgSO4) and concentrated in vacuo. The residue was purified by flash cjromatography (hexane/EtOAc 19:1) to give 3.8 g (72%) of a cream powder; MS m/z 254 (M++18, 100).
後処理
- concentrationconcentrated in vacuo
- washwashed with saturated aqueous NaHCO3 (2×20 mL)
- dry with materialdried (MgSO4)
- concentrationconcentrated in vacuo
- customThe residue was purified by flash cjromatography (hexane/EtOAc 19:1)
出典と根拠
- ORDレコード
- ord-78c06ffefe3741deb483844602ceea93
- 出典データセット
- uspto-grants-2001_10
- 特許番号
- US06310095B1
反応ノート
読み込み中…