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Ammonium formate → 4-(4-(piperazin-1-yl)phenyl)-3,4-dihydro-2H-quinoxaline-1-carboxylic acid tert-butyl ester

HRID 1510037
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1510037
[C:1]([O:5][C:6]([N:8]1[C:17]2[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=2)[N:11]([C:18]2[CH:23]=[CH:22][C:21]([N:24]3[CH2:29][CH2:28][N:27](C(OCC4C=CC=CC=4)=O)[CH2:26][CH2:25]3)=[CH:20][CH:19]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C([O-])=O.[NH4+]>[Pd].CO>[C:1]([O:5][C:6]([N:8]1[C:17]2[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=2)[N:11]([C:18]2[CH:23]=[CH:22][C:21]([N:24]3[CH2:29][CH2:28][NH:27][CH2:26][CH2:25]3)=[CH:20][CH:19]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

5

Edukt 2

HCID 2723923Ammonium formateHCID 668635804-[4-(4-(Benzyloxycarbonyl)piperazin-1-yl)phenyl]-3,4-dihydro-2H-quinoxaline-1-carboxylic acid tert-butyl ester

Produkt 1

HCID 668633984-(4-(piperazin-1-yl)phenyl)-3,4-dihydro-2H-quinoxaline-1-carboxylic acid tert-butyl esterAusbeute 95,7 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 23938PalladiumKatalysator
HCID 887
Methanol
Lösungsmittel
2×

Versuchsvorschrift

3.5 g of 4-[4-(4-(benzyloxycarbonyl)piperazin-1-yl)phenyl]-3,4-dihydro-2H-quinoxaline-1-carboxylic acid tert-butyl ester are placed in a 250 ml three-necked flask under an inert atmosphere. 66 ml of MeOH, then 1.67 g of ammonium formate followed by 1.41 g of 10% Pd/C (50% in water), are added. The mixture is brought to reflux of the methanol for 1 h 30 minutes and then brought back to ambient temperature. It is filtered on a Whatman filter under an inert atmosphere and then rinsing is carried out numerous times with methanol. The methanol is evaporated under reduced pressure. The mixture is taken up in dichloromethane and the organic phase is washed with the minimum amount of water. The organic phase is dried over sodium sulphate, filtered through a sintered glass filter and evaporated under reduced pressure. 2.5 g of 4-(4-(piperazin-1-yl)phenyl)-3,4-dihydro-2H-quinoxaline-1-carboxylic acid tert-butyl ester are obtained in the form of a white solid.

Aufarbeitung

  1. additionare added
  2. custombrought back to ambient temperature
  3. filtrationIt is filtered on a Whatman
  4. filtrationfilter under an inert atmosphere
  5. washrinsing
  6. customThe methanol is evaporated under reduced pressure
  7. washthe organic phase is washed with the minimum amount of water
  8. dry with materialThe organic phase is dried over sodium sulphate
  9. filtrationfiltered through a sintered glass
  10. filtrationfilter
  11. customevaporated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-4c5a465131584081baf5c09eceb351bc
Quelldatensatz
uspto-grants-2012_07
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08211892B2

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