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Phosphorus oxychloride → 8-Fluoro-5-(2-fluoro-4-iodo-phenylamino)-imidazo[1,5-a]pyridine-6-carboxylic acid methyl ester

HRID 2064002
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 2064002
[CH3:1][O:2][C:3](=[O:24])[C:4]1[CH:9]=[C:8]([F:10])[C:7]([CH2:11][NH:12][CH:13]=O)=[N:6][C:5]=1[NH:15][C:16]1[CH:21]=[CH:20][C:19]([I:22])=[CH:18][C:17]=1[F:23].P(Cl)(Cl)(Cl)=O>C1(C)C=CC=CC=1>[CH3:1][O:2][C:3]([C:4]1[CH:9]=[C:8]([F:10])[C:7]2[N:6]([CH:13]=[N:12][CH:11]=2)[C:5]=1[NH:15][C:16]1[CH:21]=[CH:20][C:19]([I:22])=[CH:18][C:17]=1[F:23])=[O:24]
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Komponenten

4

Edukt 2

HCID 24813Phosphorus oxychlorideHCID 591401905-Fluoro-2-(2-fluoro-4-iodo-phenylamino)-6-formylaminomethyl-nicotinic acid methyl ester

Produkt 1

HCID 591401198-Fluoro-5-(2-fluoro-4-iodo-phenylamino)-imidazo[1,5-a]pyridine-6-carboxylic acid methyl esterAusbeute 39 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1140TolueneLösungsmittel

Reaktionsbedingungen

Temperatur
95 °C

Versuchsvorschrift

To a suspension of 5-fluoro-2-(2-fluoro-4-iodo-phenylamino)-6-formylaminomethyl-nicotinic acid methyl ester (2.7 g, 6.2 mmol) in toluene (20 mL) was added phosphorous oxychloride (1.1 mL, 12.2 mmol). The reaction mixture was heated at 95° C. for 30 minutes. The reaction mixture was cooled to room temperature and then concentrated in vacuo. The resultant residue was dissolved in ethyl acetate and washed with water followed by a saturated aqueous solution of sodium bicarbonate, then brine. The organic phase was isolated, dried (MgSO4), filtered and concentrated in vacuo. The resultant residue was subjected to flash chromatography (Si-PPC, gradient 0% to 50%, ethyl acetate in hexane) to afford the title compound as a yellow solid (1.0 g, 39%). LCMS (method B): RT=3.97 min, [M+H]+=430.

Aufarbeitung

  1. temperatureThe reaction mixture was cooled to room temperature
  2. concentrationconcentrated in vacuo
  3. dissolutionThe resultant residue was dissolved in ethyl acetate
  4. washwashed with water
  5. customThe organic phase was isolated
  6. dry with materialdried (MgSO4)
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-bee746cc35f54671894f94924d3f54c8
Quelldatensatz
uspto-grants-2012_10
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08288408B2

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