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Sodium Iodide → 5-Ethyl-2-pyridinol

HRID 1438316
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1438316
C[O:2][C:3]1[CH:8]=[CH:7][C:6]([CH:9]=[CH2:10])=[CH:5][N:4]=1.[Na+].[I-]>CO.[Pd]>[CH2:9]([C:6]1[CH:7]=[CH:8][C:3](=[O:2])[NH:4][CH:5]=1)[CH3:10]
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

5

Edukt 2

HCID 5238Sodium IodideHCID 230701355-Ethenyl-2-methoxypyridine

Produkt 1

HCID 193658715-Ethyl-2-pyridinolAusbeute 83 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23938PalladiumKatalysatorHCID 887MethanolLösungsmittel

Reaktionsbedingungen

Temperatur
65 °C

Versuchsvorschrift

To a solution of 2-methoxy-5-vinyl-pyridine (2 g) in anhydrous MeOH was added Pd/C (10 wt %, 100 mg). The mixture was stirred under H2 atmosphere for 5 hours before it was filtered through a pad of celite. The solvent was removed in vacuo and the residue was taken directly into next step without further purification. The crude product from previous step was dissolved in anhydrous MeCN. To this solution was added NaI (3.3 g, 21.9 mmol) and TMSCI (2.8 mL, 21.9 mmol). The resulting mixture was heated to 65° C. for 5 hours before it was filtered through a pad of celite. The filtrate was concentrated in vacuo and the residue was purified by flash column chromatography to afford the desired product (1.5 g, 83% yield). 1H NMR (300 MHz, CDCl3): δ 1.17 (t, J=7.5 Hz, 3H), 2.39-2.49 (m, 2H), 6.50-6.58 (m, 1H), 7.15 (s, 1H), 7.35-7.45 (m, 1H).

Aufarbeitung

  1. filtrationwas filtered through a pad of celite
  2. customThe solvent was removed in vacuo
  3. customthe residue was taken directly into next step without further purification
  4. dissolutionThe crude product from previous step was dissolved in anhydrous MeCN
  5. filtrationwas filtered through a pad of celite
  6. concentrationThe filtrate was concentrated in vacuo
  7. customthe residue was purified by flash column chromatography

Quellen und Nachweise

ORD-Eintrag
ord-b1822e24b3a34028a2fc06ad2ea123b2
Quelldatensatz
uspto-grants-2009_11
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07622605B2

Notizen zur Reaktion

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