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

HRID 1251387

Reaktionsgleichung

Reaktionsgleichung von HRID 1251387
[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]

Komponenten

6

Edukt 4

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

Produkt 1

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

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 180AcetoneLösungsmittel

Versuchsvorschrift

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%.

Aufarbeitung

  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

Quellen und Nachweise

ORD-Eintrag
ord-35057c4553c3491d9a95399f4269fd73
Quelldatensatz
uspto-grants-2002_01
Patentnummer
US06342508B1

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