Sodium hydride → 1-[4-(2,2-Diethoxyethoxy)phenyl]cyclopropanecarboxylic acid

HRID 503241

反応式

HRID 503241 の反応式
C[O:2][C:3]([C:5]1([C:8]2[CH:13]=[CH:12][C:11]([OH:14])=[CH:10][CH:9]=2)[CH2:7][CH2:6]1)=[O:4].[H-].[Na+].[H][H].Br[CH2:20][CH:21]([O:25][CH2:26][CH3:27])[O:22][CH2:23][CH3:24]>CN(C=O)C>[CH2:23]([O:22][CH:21]([O:25][CH2:26][CH3:27])[CH2:20][O:14][C:11]1[CH:12]=[CH:13][C:8]([C:5]2([C:3]([OH:2])=[O:4])[CH2:7][CH2:6]2)=[CH:9][CH:10]=1)[CH3:24]

参加物

6

反応物 4

HCID 24758Sodium hydrideHCID 74852Ethane, 2-bromo-1,1-diethoxy-HCID 20770793Methyl 1-(4-hydroxyphenyl)cyclopropane-1-carboxylateHCID 178418361HCID 178418361、化合物

生成物 1

HCID 591292871-[4-(2,2-Diethoxyethoxy)phenyl]cyclopropanecarboxylic acid収率 40.3%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

反応条件

温度
160 °C

実験手順

To a stirred solution of 1-(4-hydroxy-phenyl)-cyclopropanecarboxylic acid methyl ester (15.0 g, 84.3 mmol) in DMF (50 mL) was added sodium hydride (6.7 g, 170 mmol, 60% in mineral oil) at 0° C. After hydrogen evolution ceased, 2-bromo-1,1-diethoxy-ethane (16.5 g, 84.3 mmol) was added dropwise to the reaction mixture. The reaction was stirred at 160° C. for 15 hours. The reaction mixture was poured onto ice (100 g) and was extracted with CH2Cl2. The combined organics were dried over Na2SO4. The solvent was evaporated under vacuum to give 1-[4-(2,2-diethoxy-ethoxy)-phenyl]-cyclopropanecarboxylic acid (10 g), which was used directly in the next step without purification.

後処理

  1. additionThe reaction mixture was poured onto ice (100 g)
  2. extractionwas extracted with CH2Cl2
  3. dry with materialThe combined organics were dried over Na2SO4
  4. customThe solvent was evaporated under vacuum

出典と根拠

ORDレコード
ord-856943564d0c40dea61513b73ae3b3dc
出典データセット
uspto-grants-2010_08
特許番号
US07776905B2

関連ノート

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