Lawesson's reagent → (R)-6,6-difluoro-5-(2-fluoro-5-(pyrimidin-5-yl)phenyl)-5,7,7-trimethyl-1,4-oxazepane-3-thione

HRID 331135Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 331135
[F:1][C:2]1([F:26])[C:8]([CH3:10])([CH3:9])[O:7][CH2:6][C:5](=O)[NH:4][C@@:3]1([C:13]1[CH:18]=[C:17]([C:19]2[CH:20]=[N:21][CH:22]=[N:23][CH:24]=2)[CH:16]=[CH:15][C:14]=1[F:25])[CH3:12].COC1C=CC(P2(SP(C3C=CC(OC)=CC=3)(=S)S2)=[S:36])=CC=1.C(=O)([O-])O.[Na+]>O1CCOCC1>[F:1][C:2]1([F:26])[C:8]([CH3:10])([CH3:9])[O:7][CH2:6][C:5](=[S:36])[NH:4][C@@:3]1([C:13]1[CH:18]=[C:17]([C:19]2[CH:20]=[N:21][CH:22]=[N:23][CH:24]=2)[CH:16]=[CH:15][C:14]=1[F:25])[CH3:12]

Komponenten

5

Edukt 3

HCID 87949Lawesson's reagentHCID 516892Sodium BicarbonateHCID 68380253(R)-6,6-difluoro-5-(2-fluoro-5-(pyrimidin-5-yl)phenyl)-5,7,7-trimethyl-1,4-oxazepan-3-one

Produkt 1

HCID 86671875(R)-6,6-difluoro-5-(2-fluoro-5-(pyrimidin-5-yl)phenyl)-5,7,7-trimethyl-1,4-oxazepane-3-thioneAusbeute 111,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 312751,4-DioxaneLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

A solution of (R)-6,6-difluoro-5-(2-fluoro-5-(pyrimidin-5-yl)phenyl)-5,7,7-trimethyl-1,4-oxazepan-3-one (263 mg, 720 μmol) in dioxane (24.0 ml) was treated at room temperature with Lawesson's reagent (233 mg, 576 μmol). The reaction mixture was stirred at 80° C. for 4 hours. For the workup, the reaction mixture was poured on a saturated solution of sodium hydrogencarbonate then extracted twice with ethyl acetate. The combined organic layers were washed with brine, dried over sodium sulphate, filtered and evaporated at reduced pressure to give brown oil. This residue was purified by chromatography on silica gel using a gradient of heptane/dichloromethane=100:0 to 20:80. The (R)-6,6-difluoro-5-(2-fluoro-5-(pyrimidin-5-yl)phenyl)-5,7,7-trimethyl-1,4-oxazepane-3-thione (244 mg, 89% yield) was obtained as a white foam. MS (ISP): m/z=382.1 [M+H]+.

Aufarbeitung

  1. extractionthen extracted twice with ethyl acetate
  2. washThe combined organic layers were washed with brine
  3. dry with materialdried over sodium sulphate
  4. filtrationfiltered
  5. customevaporated at reduced pressure
  6. customto give brown oil
  7. customThis residue was purified by chromatography on silica gel using a gradient of heptane/dichloromethane=100:0 to 20:80

Quellen und Nachweise

ORD-Eintrag
ord-2d20527775864a45a5b788d25c781d1e
Quelldatensatz
uspto-grants-2014_11
Patentnummer
US08877744B2

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