Potassium Iodide → 4-[3-(3,4-Dimethoxyphenyl)propoxy]-2-hydroxy-3-propylbenzoic acid methyl ester

HRID 1494242Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1494242
Br[CH2:2][CH2:3][CH2:4][C:5]1[CH:10]=[CH:9][C:8]([O:11][CH3:12])=[C:7]([O:13][CH3:14])[CH:6]=1.[CH3:15][O:16][C:17](=[O:29])[C:18]1[CH:23]=[CH:22][C:21]([OH:24])=[C:20]([CH2:25][CH2:26][CH3:27])[C:19]=1[OH:28].C(=O)([O-])[O-].[K+].[K+].[I-].[K+]>CC(C)=O>[CH3:15][O:16][C:17](=[O:29])[C:18]1[CH:23]=[CH:22][C:21]([O:24][CH2:2][CH2:3][CH2:4][C:5]2[CH:10]=[CH:9][C:8]([O:11][CH3:12])=[C:7]([O:13][CH3:14])[CH:6]=2)=[C:20]([CH2:25][CH2:26][CH3:27])[C:19]=1[OH:28]

Komponenten

6

Edukt 4

HCID 4875Potassium IodideHCID 11430Potassium CarbonateHCID 127653884-(3-Bromopropyl)-1,2-dimethoxybenzeneHCID 13019281Methyl 2,4-dihydroxy-3-propylbenzoate

Produkt 1

HCID 149863534-[3-(3,4-Dimethoxyphenyl)propoxy]-2-hydroxy-3-propylbenzoic acid methyl esterAusbeute 56,2 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 180AcetoneLösungsmittel

Versuchsvorschrift

A mixture of 9.5 g (0.037 mol) of 1-(3-bromopropyl)-3,4-dimethoxybenzene [G. H. Douglas, C. R. Walk and H. Smith, J. Med. Chem., 9, 27 (1966)], 7.0 g (0.033 mol) of 2,4-dihydroxy-3-propylbenzoic acid methyl ester, 6.9 g (0.05 mol) of potassium carbonate and 8.3 g (0.05 mol) of potassium iodide in 250 mL of acetone was stirred at reflux for 24 hours. The reaction mixture was filtered and the filtrate was concentrated under reduced pressure to an oil which was purified by high pressure liquid chromatography using 15% ethyl acetate-hexane to give 7.2 g (56% yield) of 4-[3-(3,4-dimethoxyphenyl)propoxy]-2-hydroxy-3-propylbenzoic acid methyl ester as an oil.

Aufarbeitung

  1. temperatureat reflux for 24 hours
  2. filtrationThe reaction mixture was filtered
  3. concentrationthe filtrate was concentrated under reduced pressure to an oil which
  4. customwas purified by high pressure liquid chromatography

Quellen und Nachweise

ORD-Eintrag
ord-2c3709ef46e1484ebf26fb811806f030
Quelldatensatz
uspto-grants-1991_06
Patentnummer
US05025036

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