Dichloroacetic Acid → (3-fluorobenzyl)-3-iodo-1H-pyridin-2-one

HRID 1831945Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1831945
FC1C=C(F)C=CC=1CO[C:6]1[CH:11]=[CH:10][N:9]([CH2:12][C:13]2[CH:18]=[CH:17][CH:16]=[C:15]([F:19])[CH:14]=2)[C:8](=[O:20])[CH:7]=1.[I:26]N1C(=O)CCC1=O.ClC(Cl)C(O)=O>CC#N>[F:19][C:15]1[CH:14]=[C:13]([CH:18]=[CH:17][CH:16]=1)[CH2:12][N:9]1[CH:10]=[CH:11][CH:6]=[C:7]([I:26])[C:8]1=[O:20]

Komponenten

5

Edukt 3

HCID 6597Dichloroacetic AcidHCID 120273N-IodosuccinimideHCID 22050302HCID 22050302, Verbindung

Produkt 1

HCID 79784710(3-fluorobenzyl)-3-iodo-1H-pyridin-2-oneAusbeute 106 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6342AcetonitrileLösungsmittel

Reaktionsbedingungen

Temperatur
60 °C

Versuchsvorschrift

To a mixture of 4-(2,4-difluorobenzyloxy)-1-(3-fluorobenzyl)-1H-pyridin-2-one (0.15 g, 0.43 mmol) and N-iodosuccinimide (0.10 g, 0.46 mmol) in CH3CN (3 mL) was added dichloroacetic acid (13 mg, 0.10 mmol), and the reaction mixture was heated to 60° C. for 4 h. The reaction mixture was cooled to room temperature, concentrated under reduced pressure, and the residue was dissolved in methylene chloride. The organic solution was washed with a saturated solution of NaHCO3 and then brine, dried (Na2SO4), filtered and concentrated under reduced pressure. Purification by flash column chromatography (silica, eluent 90:10 methylene chloride/hexanes to 99:1 methylene chloride/methanol) provided 4-(2,4-difluorobenzyloxy)-[(3-fluorobenzyl)-3-iodo-1H-pyridin-2-one as a white solid (0.15 g, 77%): mp 164-167° C.; 1H NMR (300 MHz, CDCl3) δ 7.65-7.55 (m, 1H), 7.35-7.26 (m, 2H), 7.15-6.80 (m, 5H), 6.05 (d, J=6 Hz, 1H), 5.22 (s, 2H), 5.16 (s, 2H) ES HRMS m/z 472.0033 (M+H C19H14F31NO2 requires 472.0018).

Aufarbeitung

  1. temperatureThe reaction mixture was cooled to room temperature
  2. concentrationconcentrated under reduced pressure
  3. dissolutionthe residue was dissolved in methylene chloride
  4. washThe organic solution was washed with a saturated solution of NaHCO3
  5. dry with materialbrine, dried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure
  8. customPurification by flash column chromatography (silica, eluent 90:10 methylene chloride/hexanes to 99:1 methylene chloride/methanol)

Quellen und Nachweise

ORD-Eintrag
ord-5cabf8533a07426a86417a10cc136610
Quelldatensatz
uspto-grants-2006_06
Patentnummer
US07067540B2

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