Sulfuric Acid → 3,5,6-Trimethyl-2-[phenyl-(3-pyridyl)methyl]-1,4-benzoquinone

HRID 232057

反応式

HRID 232057 の反応式
[C:1]1([CH:7]([C:9]2[CH:10]=[N:11][CH:12]=[CH:13][CH:14]=2)O)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH3:15][C:16]1[C:22]([CH3:23])=[C:21]([OH:24])[C:20]([CH3:25])=[CH:19][C:17]=1[OH:18].S(=O)(=O)(O)O.C(=O)([O-])O.[Na+]>ClCCl>[CH3:25][C:20]1[C:21](=[O:24])[C:22]([CH3:23])=[C:16]([CH3:15])[C:17](=[O:18])[C:19]=1[CH:7]([C:1]1[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1)[C:9]1[CH:10]=[N:11][CH:12]=[CH:13][CH:14]=1

参加物

6

反応物 4

HCID 1118Sulfuric AcidHCID 12785TrimethylhydroquinoneHCID 234839Phenyl(pyridin-3-yl)methanolHCID 516892Sodium Bicarbonate

生成物 1

HCID 142777673,5,6-Trimethyl-2-[phenyl-(3-pyridyl)methyl]-1,4-benzoquinone収率 72.9%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

To a solution of 1.0 g (5.4 mmol) of phenyl-(3-pyridyl)methanol and 823 mg (5.4 mmol) of 2,3,5-trimethylhydroquinone in 15 ml of dichloromethane, 0.5 ml (9.4 mmol) of concentrated sulfuric acid was added, and refluxed by heating for 2 hours. The reaction mixture was made weakly alkaline with a saturated aqueous solution of sodium hydrogen carbonate, from which the organic phase was separated while the aqueous phase was extracted with chloroform and the extract was combined with the organic phase. The organic phase was washed with water, dried, and oxidized with air, from which the solvent was evaporated off. The residue was purified with silica gel column chromatography (isopropyl ether-ethyl acetate (1:1)), to give 1.25 g (72.7%) of 3,5,6-trimethyl-2-[phenyl-(3-pyridyl)methyl]-1,4-benzoquinone. The physical data are shown in Table 1.

後処理

  1. temperaturerefluxed
  2. temperatureby heating for 2 hours
  3. customfrom which the organic phase was separated while the aqueous phase
  4. extractionwas extracted with chloroform
  5. washThe organic phase was washed with water
  6. customdried
  7. customwas evaporated off
  8. customThe residue was purified with silica gel column chromatography (isopropyl ether-ethyl acetate (1:1))

出典と根拠

ORDレコード
ord-f09bf5353bec4f68b156e63e3916b353
出典データセット
uspto-grants-1989_07
特許番号
US04851413

関連ノート

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