Water → 4-Pentynoic acid, 1,1-dimethylethyl ester

HRID 604784

Reaktionsgleichung

Reaktionsgleichung von HRID 604784
C(=O)([O-])[O-].[K+].[K+].[C:7](Br)([CH3:10])([CH3:9])[CH3:8].[C:12]([OH:18])(=[O:17])[CH2:13][CH2:14][C:15]#[CH:16].O>[Cl-].C([N+](CC)(CC)CC)C1C=CC=CC=1.CN(C)C(=O)C>[C:12]([O:18][C:7]([CH3:10])([CH3:9])[CH3:8])(=[O:17])[CH2:13][CH2:14][C:15]#[CH:16]

Komponenten

7

Edukt 4

HCID 962WaterHCID 10485t-Butyl bromideHCID 11430Potassium CarbonateHCID 224644-Pentynoic acid

Produkt 1

HCID 108773414-Pentynoic acid, 1,1-dimethylethyl ester

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 66133Benzyl triethylammonium chlorideKatalysatorHCID 31374DimethylacetamideLösungsmittel

Reaktionsbedingungen

Temperatur
55 °C

Versuchsvorschrift

Benzyltriethylammonium chloride (5.92 g), potassium carbonate (93.4 g), and t-butyl bromide (143 ml) were added to a solution of 4-pentynoic acid (2550 mg) in N,N-dimethylacetamide (230 ml), and this reaction mixture was stirred at 55° C. for 24 hours. After water was added, the reaction mixture was extracted with ethyl acetate, washed with water, dried over anhydrous magnesium chloride, and then filtered through silica gel. The filtrate was concentrated under reduced pressure to give the title compound (2.10 g). This compound was used in the following reaction without further purification.

Aufarbeitung

  1. extractionthe reaction mixture was extracted with ethyl acetate
  2. washwashed with water
  3. dry with materialdried over anhydrous magnesium chloride
  4. filtrationfiltered through silica gel
  5. concentrationThe filtrate was concentrated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-2ad4ecf459ea40bd8e5e1c372a001624
Quelldatensatz
uspto-grants-2011_03
Patentnummer
US07910712B2

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