Ethyl Bromide → 1-(6-Methylbenzo[d][1,3]dioxol-5-yl)propan-1-ol

HRID 2259729Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2259729
[CH3:1][C:2]1[C:7]([CH:8]=[O:9])=[CH:6][C:5]2[O:10][CH2:11][O:12][C:4]=2[CH:3]=1.[Mg].Br[CH2:15][CH3:16].[Cl-].[NH4+]>O1CCCC1>[CH3:1][C:2]1[C:7]([CH:8]([OH:9])[CH2:15][CH3:16])=[CH:6][C:5]2[O:10][CH2:11][O:12][C:4]=2[CH:3]=1

Komponenten

6

Edukt 4

HCID 6332Ethyl BromideHCID 25517Ammonium ChlorideHCID 31462426-Methyl-2H-1,3-benzodioxole-5-carbaldehydeHCID 5462224Magnesium

Produkt 1

HCID 145148971-(6-Methylbenzo[d][1,3]dioxol-5-yl)propan-1-olAusbeute 95,9 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

A solution of 2.0 g of (6-methyl-1,3-benzodioxol-5-yl)carboxaldehyde in 15 ml of anhydrous tetrahydrofuran was added dropwise at room temperature to a Grignard reagent prepared from 0.32 g of magnesium ribbon, 20 ml of anhydrous tetrahydrofuran and 1.4 g of bromoethane. The mixture was stirred for 2 h. A saturated ammonium chloride solution was added to the reaction mixture. The solvent was distilled off. After extraction with ethyl acetate followed by drying over magnesium sulfate and concentration under reduced pressure, the residue was purified according to silica gel column chromatography (ethyl acetate/hexane=2:8) to obtain 2.27 g of the intended compound in the form of white crystals.

Aufarbeitung

  1. distillationThe solvent was distilled off
  2. extractionAfter extraction with ethyl acetate
  3. dry with materialby drying over magnesium sulfate and concentration under reduced pressure
  4. customthe residue was purified

Quellen und Nachweise

ORD-Eintrag
ord-38fbaecce78245a6b80f10e6e4065b02
Quelldatensatz
uspto-grants-1995_12
Patentnummer
US05475024

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