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Ethyl Acetate → tert-butyl 4-methyl-3-(6-tosyl-6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazin-1-yl)piperidine-1-carboxylate

HRID 1854361
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1854361
[CH3:1][CH:2]1[CH2:7][CH2:6][N:5]([C:8]([O:10][C:11]([CH3:14])([CH3:13])[CH3:12])=[O:9])[CH2:4][CH:3]1[C:15](=O)[NH:16][CH2:17][C:18]1[N:19]=[C:20]2[CH:26]=[CH:25][N:24]([S:27]([C:30]3[CH:36]=[CH:35][C:33]([CH3:34])=[CH:32][CH:31]=3)(=[O:29])=[O:28])[C:21]2=[N:22][CH:23]=1.COC1C=CC(P2(SP(C3C=CC(OC)=CC=3)(=S)S2)=S)=CC=1.CCOC(C)=O>O1CCOCC1.C(O[Hg]OC(=O)C)(=O)C>[CH3:1][CH:2]1[CH2:7][CH2:6][N:5]([C:8]([O:10][C:11]([CH3:14])([CH3:12])[CH3:13])=[O:9])[CH2:4][CH:3]1[C:15]1[N:19]2[C:20]3[CH:26]=[CH:25][N:24]([S:27]([C:30]4[CH:31]=[CH:32][C:33]([CH3:34])=[CH:35][CH:36]=4)(=[O:28])=[O:29])[C:21]=3[N:22]=[CH:23][C:18]2=[CH:17][N:16]=1
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Komponenten

6

Edukt 3

HCID 8857Ethyl AcetateHCID 87949Lawesson's reagentHCID 58009799tert-butyl 4-methyl-3-((5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)methylcarbamoyl)piperidine-1-carboxylate

Produkt 1

HCID 58009941tert-butyl 4-methyl-3-(6-tosyl-6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazin-1-yl)piperidine-1-carboxylateAusbeute 44,9 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 16683746
Diacetyloxymercury
Katalysator
2×
HCID 312751,4-DioxaneLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

To a solution of tert-butyl 4-methyl-3-((5-tosyl-5H-pyrrolo[2,3-b]pyrazin-2-yl)methylcarbamoyl)piperidine-1-carboxylate (44 g, 83 mmol, Example #13, Step H) in 1,4-dioxane (500 mL) was added Lawesson's reagent (20.2 g, 50.0 mmol). The reaction was heated at about 80° C. for about 1 h. The reaction was allowed to cool to ambient temperature followed by the addition of diacetoxymercury (26.6 g, 83.0 mmol). After about 1 h, additional diacetoxymercury (13.3 g, 42.0 mmol) was added. After about 15 min, the reaction was poured into stirred EtOAc (2 L). After about 15 min the reaction was filtered through Celite® and the filtrate was concentrated under reduced pressure. The resulting residue was triturated with EtOAc (500 mL) and filtered. The filtrate was concentrated under reduced pressure and purified by silica gel chromatography (330 g column) eluting with a gradient of 10-50% EtOAc in heptane to provide tert-butyl 4-methyl-3-(6-tosyl-6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazin-1-yl)piperidine-1-carboxylate (19 g, 44%) as a white solid: LC/MS (Table 2, Method a) Rt=2.57 min; MS m/z: 510 (M+H)+.

Aufarbeitung

  1. temperatureto cool to ambient temperature
  2. waitAfter about 15 min
  3. additionthe reaction was poured
  4. filtrationAfter about 15 min the reaction was filtered through Celite®
  5. concentrationthe filtrate was concentrated under reduced pressure
  6. customThe resulting residue was triturated with EtOAc (500 mL)
  7. filtrationfiltered
  8. concentrationThe filtrate was concentrated under reduced pressure
  9. custompurified by silica gel chromatography (330 g column)
  10. washeluting with a gradient of 10-50% EtOAc in heptane

Quellen und Nachweise

ORD-Eintrag
ord-87660c515b4c4520bd41ff2458bb8247
Quelldatensatz
uspto-grants-2015_02
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08962629B2

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