Potassium Carbonate → 2-(4-Methoxy-benzenesulfonyl)5,9-dimethyl-deca-4,8-dienoic acid ethyl ester

HRID 1531036ノート

反応式

HRID 1531036 の反応式
[CH2:1]([O:3][C:4](=[O:17])[CH2:5][S:6]([C:9]1[CH:14]=[CH:13][C:12]([O:15][CH3:16])=[CH:11][CH:10]=1)(=[O:8])=[O:7])[CH3:2].[CH2:18](Br)/[CH:19]=[C:20](/[CH2:22][CH2:23][CH:24]=[C:25]([CH3:27])[CH3:26])\[CH3:21].C1OCCOCCOCCOCCOCCOC1.C([O-])([O-])=O.[K+].[K+]>CC(C)=O>[CH2:1]([O:3][C:4](=[O:17])[CH:5]([S:6]([C:9]1[CH:14]=[CH:13][C:12]([O:15][CH3:16])=[CH:11][CH:10]=1)(=[O:7])=[O:8])[CH2:18][CH:19]=[C:20]([CH3:21])[CH2:22][CH2:23][CH:24]=[C:25]([CH3:27])[CH3:26])[CH3:2]

参加物

6

反応物 4

HCID 11430Potassium CarbonateHCID 2855718-Crown-6HCID 14823722-[(4-Methoxyphenyl)sulfonyl]acetic acid ethyl esterHCID 53658672,6-Octadiene, 1-bromo-3,7-dimethyl-, (2E)-

生成物 1

HCID 538651812-(4-Methoxy-benzenesulfonyl)5,9-dimethyl-deca-4,8-dienoic acid ethyl ester

試薬・触媒・溶媒 1

HCID 180Acetone溶媒

実験手順

To a stirred solution of (4-methoxy-benzenesulfonyl)-acetic acid ethyl ester (5.16 g, 20 mmol), geranyl bromide (4.2 g, 20 mmol) and 18-Crown-6 (500 mg) in acetone (250 ml) was added K2CO3 (10 gms, excess) and the mixture refluxed foe 24 hours. At the end, the reaction mixture was filtered and the acetone layer was concentrated. The residue obtained was extracted with chloroform, washed well with water, dried over anhydrous MgSO4, filtered and concentrated. The product obtained was purified by silica-gel column chromatography, eluting with 30% ethy acetate: hexane. The product 2-(4-methoxy-benzenesulfonyl)-5,9-dimethyl-deca-4,8-dienoic acid ethyl ester was isolated as a colourless oil. Yield: 7.0 g, 89%.

後処理

  1. temperaturethe mixture refluxed foe 24 hours
  2. filtrationAt the end, the reaction mixture was filtered
  3. concentrationthe acetone layer was concentrated
  4. customThe residue obtained
  5. extractionwas extracted with chloroform
  6. washwashed well with water
  7. dry with materialdried over anhydrous MgSO4
  8. filtrationfiltered
  9. concentrationconcentrated
  10. customThe product obtained
  11. customwas purified by silica-gel column chromatography
  12. washeluting with 30% ethy acetate

出典と根拠

ORDレコード
ord-e5e973aa66ea4b1ca4e17cacba732088
出典データセット
uspto-grants-2001_03
特許番号
US06197791B1

反応ノート

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