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Water → 4-[3-(5-chloropentyloxy)phenyl]-4-hydroxy-7-methoxymethyloxy-3-[4-(methoxymethyloxy)phenyl]-2,3-dihydro-4H-benzopyran

HRID 1859328
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1859328
[OH:1][C:2]1[CH:3]=[C:4]([C:8]2([OH:32])[C:13]3[CH:14]=[CH:15][C:16]([O:18][CH2:19][O:20][CH3:21])=[CH:17][C:12]=3[O:11][CH2:10][CH:9]2[C:22]2[CH:27]=[CH:26][C:25]([O:28][CH2:29][O:30][CH3:31])=[CH:24][CH:23]=2)[CH:5]=[CH:6][CH:7]=1.Br[CH2:34][CH2:35][CH2:36][CH2:37][CH2:38][Cl:39].[OH-].[Na+].O>CC(C)=O>[Cl:39][CH2:38][CH2:37][CH2:36][CH2:35][CH2:34][O:1][C:2]1[CH:3]=[C:4]([C:8]2([OH:32])[C:13]3[CH:14]=[CH:15][C:16]([O:18][CH2:19][O:20][CH3:21])=[CH:17][C:12]=3[O:11][CH2:10][CH:9]2[C:22]2[CH:23]=[CH:24][C:25]([O:28][CH2:29][O:30][CH3:31])=[CH:26][CH:27]=2)[CH:5]=[CH:6][CH:7]=1
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Komponenten

6

Edukt 4

HCID 962WaterHCID 14798Sodium HydroxideHCID 960701-Bromo-5-chloropentaneHCID 221235924-(3-hydroxyphenyl)-4-hydroxy-7-methoxymethyloxy-3-[4-(methoxymethyloxy)phenyl]-2,3-dihydro-4H-benzopyran

Produkt 1

HCID 221235894-[3-(5-chloropentyloxy)phenyl]-4-hydroxy-7-methoxymethyloxy-3-[4-(methoxymethyloxy)phenyl]-2,3-dihydro-4H-benzopyran
Ausbeute 94,2 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 180AcetoneLösungsmittel

Versuchsvorschrift

4-(3-Hydroxyphenyl)-4-hydroxy-7-methoxymethyloxy-3-[4-(methoxymethyloxy)phenyl]-2,3-dihydro-4H-benzopyran (283 mg, 0.6 mmol), 1-bromo-5-chloropentane (598 mg, 3.2 mmol) and aqueous 2N-NaOH solution (1 ml) were dissolved in acetone (3 ml) and then refluxed for 6 hours. The reaction mixture was cooled to room temperature and then water was added thereto. The reaction solution was extracted with ethyl acetate and the organic layer was dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure to remove the organic solvent. The concentrate was separated by column chromatography (n-hexane:ethyl acetate=8:1) to obtain 307 mg (yield: 94%) of the title compound as a colorless oil.

Aufarbeitung

  1. temperaturerefluxed for 6 hours
  2. extractionThe reaction solution was extracted with ethyl acetate
  3. dry with materialthe organic layer was dried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customto remove the organic solvent
  7. customThe concentrate was separated by column chromatography (n-hexane:ethyl acetate=8:1)

Quellen und Nachweise

ORD-Eintrag
ord-d4b2f8140b06480599905f51b98644d4
Quelldatensatz
uspto-grants-2000_11
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US06153768

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