Methyl iodide → 4-Benzyloxy-2-methoxybenzoic acid methyl ester

HRID 1671

反応式

HRID 1671 の反応式
[CH2:1]([O:8][C:9]1[CH:18]=[CH:17][C:12]([C:13]([O:15][CH3:16])=[O:14])=[C:11]([OH:19])[CH:10]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[H-].[Na+].[CH3:22]I>CN(C=O)C>[CH2:1]([O:8][C:9]1[CH:18]=[CH:17][C:12]([C:13]([O:15][CH3:16])=[O:14])=[C:11]([O:19][CH3:22])[CH:10]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

参加物

5

反応物 3

HCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 225489Methyl 4-(benzyloxy)-2-hydroxybenzoate

生成物 1

HCID 108260394-Benzyloxy-2-methoxybenzoic acid methyl ester

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

実験手順

To a stirred, 0° C. solution of methyl 4-benzyloxy-2-hydroxybenzoate (12 g, 46 mmol) in DMF (150 mL) was added NaH (2.76 g, 69 mmol) and methyl iodide (7.2 mL, 116 mmol). The solution was allowed to warm to ambient temperature overnight with stirring. The reaction mixture was poured onto ice and the resulting aqueous solution extracted with Et2O (3×200 mL). The organic phase was dried (MgSO4), filtered and the Et2O removed under reduced pressure. The crude white solid was purified by pressurized silica gel column chromatography using 4:1 hexanes:EtOAc. Evaporation of the hexanes:EtOAc mixture gave the desired methyl 4-benzyloxy-2-methoxybenzoate as a white powder.

後処理

  1. additionThe reaction mixture was poured onto ice
  2. extractionthe resulting aqueous solution extracted with Et2O (3×200 mL)
  3. dry with materialThe organic phase was dried (MgSO4)
  4. filtrationfiltered
  5. customthe Et2O removed under reduced pressure
  6. customThe crude white solid was purified by pressurized silica gel column chromatography
  7. customEvaporation of the hexanes

出典と根拠

ORDレコード
ord-c4670bc17b3d4dddbc6d0f72787fbc62
出典データセット
uspto-grants-1998_03
特許番号
US05726172

関連ノート

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