Sodium Iodide → 2-(1-Methoxycarbonylethoxy)benzoic acid methyl ester

HRID 638702

Reaktionsgleichung

Reaktionsgleichung von HRID 638702
[CH3:1][O:2][C:3](=[O:17])[CH:4]([C:6]1C=CC2C(=CC=C(O)C=2)C=1)C.[C:18]([O-])([O-])=[O:19].[K+].[K+].[I-].[Na+].Br[CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][C:32]([O:34][CH3:35])=[O:33]>CC(C)=O>[CH3:35][O:34][C:32](=[O:33])[C:31]1[CH:30]=[CH:29][CH:28]=[CH:27][C:18]=1[O:19][CH:4]([C:3]([O:2][CH3:1])=[O:17])[CH3:6]

Komponenten

6

Edukt 4

HCID 5238Sodium IodideHCID 11430Potassium CarbonateHCID 5988972-(6-Hydroxy-naphthalen-2-yl)-propionic acid methyl esterHCID 4170292Methyl 6-Bromohexanoate

Produkt 1

HCID 426389702-(1-Methoxycarbonylethoxy)benzoic acid methyl esterAusbeute 83,7 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 180AcetoneLösungsmittel

Versuchsvorschrift

To a mixture of 2-(6-Hydroxy-naphthalen-2-yl)-propionic acid methyl ester 6 (150 g, 652 mmol), anhydrous K2CO3 (480 gr, 3.473 mol) and sodium iodide (22.5 grams, 150 mmol) in anhydrous acetone (2000 ml) was added methyl 6-bromohexanoate (216 g, 1.033 mol) and refluxed for 60 hours. Acetone was distilled off and water (1500 ml) was added. Crude 9 was extracted into ethyl acetate, dried over Na2SO4, distilled and purified by column chromatography on silica gel using hexane as eluant to give pure 2 (130 g, 55.6%) as a light yellow syrup. The structure was confirmed with NMR.

Aufarbeitung

  1. temperaturerefluxed for 60 hours
  2. distillationAcetone was distilled off
  3. additionwater (1500 ml) was added
  4. extractionCrude 9 was extracted into ethyl acetate
  5. dry with materialdried over Na2SO4
  6. distillationdistilled
  7. custompurified by column chromatography on silica gel

Quellen und Nachweise

ORD-Eintrag
ord-4ac93caa625a4199abdd8e665cf3bd23
Quelldatensatz
uspto-grants-2010_04
Patentnummer
US07691364B2

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