4-Bromo-2-methylbut-1-ene → 2-Methoxy-1-[2,4,6-trihydroxy-3,5-di(3-methyl-2-buten-1-yl)phenyl]ethanone

HRID 1528034

反応式

HRID 1528034 の反応式
[CH3:1][O:2][CH2:3][C:4]([C:6]1[C:11]([OH:12])=[CH:10][C:9]([OH:13])=[CH:8][C:7]=1[OH:14])=[O:5].[CH2:15](Br)[CH2:16][C:17]([CH3:19])=[CH2:18]>[OH-].[K+]>[CH3:1][O:2][CH2:3][C:4]([C:6]1[C:7]([OH:14])=[C:8]([CH2:15][CH:16]=[C:17]([CH3:19])[CH3:18])[C:9]([OH:13])=[C:10]([CH2:3][CH:4]=[C:6]([CH3:11])[CH3:7])[C:11]=1[OH:12])=[O:5]

参加物

4

反応物 2

HCID 5495854-Bromo-2-methylbut-1-eneHCID 6434002-Methoxy-1-(2,4,6-trihydroxyphenyl)ethanone

生成物 1

HCID 867022152-Methoxy-1-[2,4,6-trihydroxy-3,5-di(3-methyl-2-buten-1-yl)phenyl]ethanone収率 41%

試薬・触媒・溶媒 1

HCID 14797Potassium Hydroxide溶媒

実験手順

2-methoxy-1-(2,4,6-trihydroxyphenyl)ethanone (8.3 g, 42 mmol) was dissolved in a 5% potassium hydroxide aqueous solution (84 ml). After the reaction mixture was cooled below 0° C., Isopentenyl bromide (12.48 g, 84 mmol) was slowly added dropwise to within 30 minutes. The reaction mixture was stirred at room temperature (RT) for 2 hours, then poured into an ice water and acidified to pH 2. The reaction mixture was extracted with ethyl acetate. The extract was collected and dried over anhydrous sodium sulfate, followed by removing solvent. The desired compound was obtained by purifying the residue by silica gel column chromatography (dichloromethane as eluent) (5.7 g, yield 41%). 1H NMR (400 MHz, DMSO-d6): δ=11.44 (s, 2H), 9.24 (s, 1H), 5.00 (t, 2H, J=6.8 Hz), 4.63 (s, 2H,), 3.31 (s, 3H), 3.22 (d, 4H, J=6.8 Hz), 1.67 (s, 6H), 1.58 (s, 6H).

後処理

  1. temperatureAfter the reaction mixture was cooled below 0° C.
  2. extractionThe reaction mixture was extracted with ethyl acetate
  3. customThe extract was collected
  4. dry with materialdried over anhydrous sodium sulfate
  5. customby removing solvent

出典と根拠

ORDレコード
ord-53f269416ed1433b81d3fd78cfd8b932
出典データセット
uspto-grants-2015_07
特許番号
US09090583B2

関連ノート

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