Water → 3-(3,5,5,8,8-Pentamethyl-5,6,7,8-tetrahydro-2-naphthyl)-4-methoxy-6-hydroxybenzaldehyde

HRID 488821

反応式

HRID 488821 の反応式
Br[C:2]1[CH:3]=[C:4]([C:7]([OH:12])=[CH:8][C:9]=1[O:10][CH3:11])[CH:5]=[O:6].[CH3:13][C:14]1[C:15](B(O)O)=[CH:16][C:17]2[C:18]([CH3:27])([CH3:26])[CH2:19][CH2:20][C:21]([CH3:25])([CH3:24])[C:22]=2[CH:23]=1.C(=O)([O-])[O-].[K+].[K+].O>COCCOC.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH3:13][C:14]1[C:15]([C:2]2[CH:3]=[C:4]([C:7]([OH:12])=[CH:8][C:9]=2[O:10][CH3:11])[CH:5]=[O:6])=[CH:16][C:17]2[C:18]([CH3:27])([CH3:26])[CH2:19][CH2:20][C:21]([CH3:25])([CH3:24])[C:22]=2[CH:23]=1

参加物

7

反応物 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 8181085-Bromo-2-hydroxy-4-methoxybenzaldehydeHCID 10037535(3,5,5,8,8-Pentamethyl-5,6,7,8-tetrahydronaphthalen-2-yl)boronic acid

生成物 1

HCID 222683753-(3,5,5,8,8-Pentamethyl-5,6,7,8-tetrahydro-2-naphthyl)-4-methoxy-6-hydroxybenzaldehyde収率 73%

試薬・触媒・溶媒 2

HCID 178418397HCID 178418397、化合物触媒HCID 80711,2-Dimethoxyethane溶媒

実験手順

A mixture of 3-bromo-6-hydroxy-4-methoxy-benzaldehyde (2 g, 8.66 mmol), (3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydronaphthalen-2-yl) boronic acid (3.18 g, 12.99 mmol), potassium carbonate (4.79 g, 34.63 mmol) and water (4 mL) in anhydrous 1,2-dimethoxyethane (140 mL) was degassed with argon for 15 minutes prior to the addition of tetrakis(triphenylphosphine)palladium(0) (2.0 g, 1.73 mmol). The reaction mixture was heated under reflux for 15 hours, allowed to cool to room temperature and extracted with ethyl acetate (2×100 mL). The organic extracts were successively washed with water (100 mL), a saturated aqueous solution of NH4Cl (100 mL), a saturated aqueous solution of NaCl (100 mL), dried over MgSO4 and filtered. Removal of the solvent under reduced pressure gave an oil which was purified by column chromatography, using a Biotage 40M cartridge, eluting with 5% ethyl acetate/95% hexane, to give 3-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydro-2-naphthyl)-4-methoxy-6-hydroxybenzaldehyde as a white solid (2.2 g, 73%).

後処理

  1. customwas degassed with argon for 15 minutes
  2. temperatureThe reaction mixture was heated
  3. temperatureunder reflux for 15 hours
  4. extractionextracted with ethyl acetate (2×100 mL)
  5. washThe organic extracts were successively washed with water (100 mL)
  6. dry with materiala saturated aqueous solution of NH4Cl (100 mL), a saturated aqueous solution of NaCl (100 mL), dried over MgSO4
  7. filtrationfiltered
  8. customRemoval of the solvent under reduced pressure
  9. customgave an oil which
  10. customwas purified by column chromatography
  11. washeluting with 5% ethyl acetate/95% hexane

出典と根拠

ORDレコード
ord-2e7e810953514735885124a0be175611
出典データセット
uspto-grants-2005_12
特許番号
US06974826B2

関連ノート

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