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

HRID 1969783
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1969783
S([N:11]1[C:15]2[N:16]=[CH:17][C:18]3[N:19]([C:20]([C@@H:23]4[CH2:28][CH2:27][CH2:26][N:25]([C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])[CH2:24]4)=[N:21][CH:22]=3)[C:14]=2[CH:13]=[CH:12]1)(C1C=CC(C)=CC=1)(=O)=O.[OH-].[Na+].CCOC(C)=O.[NH4+].[Cl-]>O1CCOCC1>[C:20]1([C@@H:23]2[CH2:28][CH2:27][CH2:26][N:25]([C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])[CH2:24]2)[N:19]2[C:14]3[CH:13]=[CH:12][NH:11][C:15]=3[N:16]=[CH:17][C:18]2=[CH:22][N:21]=1
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 4

HCID 8857Ethyl AcetateHCID 14798Sodium HydroxideHCID 25517Ammonium ChlorideHCID 58557605(R)-tert-butyl 3-(6-tosyl-6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazin-1-yl)piperidine-1-carboxylate

Produkt 1

HCID 58557937(R)-tert-butyl 3-(6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazin-1-yl)piperidine-1-carboxylateAusbeute 92 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 312751,4-DioxaneLösungsmittel

Reaktionsbedingungen

Temperatur
60 °C

Versuchsvorschrift

To a solution of (R)-tert-butyl 3-(6-tosyl-6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazin-1-yl)piperidine-1-carboxylate (4.44 g, 8.96 mmol) in 1,4-dioxane (54 mL) was added NaOH (2 N aqueous, 8.9 mL, 18 mmol), and the resulting mixture was heated at about 60° C. for about 3 h. The reaction was cooled to ambient temperature and EtOAc (30 mL) and saturated aqueous NH4Cl (20 mL) were added. The organic layer was separated and the aqueous layer was further extracted with EtOAc (40 mL). The combined organic layers were washed with brine (40 mL), dried over anhydrous MgSO4, filtered, and coned under reduced pressure. The material was purified by silica gel chromatography eluting with a gradient of 0-10% MeOH in DCM to afford (R)-tert-butyl 3-(6H-imidazo[1,5-a]pyrrolo[2,3-e]pyrazin-1-yl)piperidine-1-carboxylate (2.80 g, 92%): LC/MS (Table 1, Method b) Rt=1.85 min; MS m/z: 342 (M+H)+.

Aufarbeitung

  1. temperatureThe reaction was cooled to ambient temperature
  2. customThe organic layer was separated
  3. extractionthe aqueous layer was further extracted with EtOAc (40 mL)
  4. washThe combined organic layers were washed with brine (40 mL)
  5. dry with materialdried over anhydrous MgSO4
  6. filtrationfiltered
  7. customThe material was purified by silica gel chromatography
  8. washeluting with a gradient of 0-10% MeOH in DCM

Quellen und Nachweise

ORD-Eintrag
ord-bc542c2f3f494220afe3eec2b5fc720d
Quelldatensatz
uspto-grants-2013_04
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08426411B2

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