Water → (3-Methoxy-1,2-phenylene)dimethanol

HRID 505252ノート

反応式

HRID 505252 の反応式
[CH3:1][O:2][C:3]1[CH:4]=[CH:5][CH:6]=[C:7]2[C:11]=1[C:10](=[O:12])[O:9][CH2:8]2.[H-].[H-].[H-].[H-].[Li+].[Al+3].O.C(Cl)Cl>C1COCC1>[OH:9][CH2:8][C:7]1[CH:6]=[CH:5][CH:4]=[C:3]([O:2][CH3:1])[C:11]=1[CH2:10][OH:12]

参加物

6

反応物 4

HCID 962Water2 回HCID 6344DichloromethaneHCID 109865837-methoxy-3H-isobenzofuran-1-oneHCID 21226445Aluminium lithium hydride

生成物 1

HCID 14892485(3-Methoxy-1,2-phenylene)dimethanol収率 90%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

反応条件

温度
0 °C

実験手順

A solution of 7-methoxy-3H-isobenzofuran-1-one (16.65 g, 101.4 mmol) in anhydrous THF (200 ml) was added at room temperature under an atmosphere of argon to a freshly prepared solution of LiAlH4 (7.70 g, 202.8 mmol, 2.0 equiv) in THF (100 ml). After 30 minutes at room temperature, TLC analysis indicated complete conversion. The reaction mixture was cooled to 0° C. and water was added dropwise until gas evolution ceased. Water (500 ml) and CH2Cl2 (500 ml) was added to form a white suspension. After filtration, the filtrate was extracted with CH2Cl2 (4 liters in total). The combined organic layers were dried over Na2SO4, filtered and concentrated in vacuo to afford the title compound (15.34 g, 90%) in adequate purity for direct use in the next transformation. 1H NMR (400 MHz, CDCl3): δ=7.27 (t, J=7.8 Hz, 1H), 6.96 (d, J=7.3 Hz, 1H), 6.89 (d, J=8.3 Hz, 1H), 4.83 (s, 2H); 4.72 (s, 2H), 3.85 (s, 3H), 2.8-2.6 (br s, 2H). MS (ES+): 169 (M+H)+.

後処理

  1. customto form a white suspension
  2. filtrationAfter filtration
  3. extractionthe filtrate was extracted with CH2Cl2 (4 liters in total)
  4. dry with materialThe combined organic layers were dried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-7a5900d4dcb64bf0b912e8bad28fb2b4
出典データセット
uspto-grants-2010_08
特許番号
US07781438B2

反応ノート

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