Dimethylformamide → Tert-butyl 4-(2-fluoro-3-formylbenzoyl)piperazine-1-carboxylate

HRID 1725508Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1725508
Br[C:2]1[C:3]([F:23])=[C:4]([CH:20]=[CH:21][CH:22]=1)[C:5]([N:7]1[CH2:12][CH2:11][N:10]([C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])[CH2:9][CH2:8]1)=[O:6].C([Mg]Cl)C(C)C.CN(C)[CH:32]=[O:33].[Cl-].[NH4+]>O1CCCC1>[F:23][C:3]1[C:2]([CH:32]=[O:33])=[CH:22][CH:21]=[CH:20][C:4]=1[C:5]([N:7]1[CH2:12][CH2:11][N:10]([C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])[CH2:9][CH2:8]1)=[O:6]

Komponenten

6

Edukt 4

HCID 6228DimethylformamideHCID 25517Ammonium ChlorideHCID 57562603Tert-butyl 4-(3-bromo-2-fluorobenzoyl)piperazine-1-carboxylateHCID 178418368HCID 178418368, Verbindung

Produkt 1

HCID 57562639Tert-butyl 4-(2-fluoro-3-formylbenzoyl)piperazine-1-carboxylate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

194 mg of tert-butyl 4-(3-bromo-2-fluorobenzoyl)piperazine-1-carboxylate was dissolved in 5.0 ml of tetrahydrofuran, and 1.25 ml of a solution of isobutylmagnesium chloride in tetrahydrofuran (2.0 M) was added thereto at −78° C. After stirring at the same temperature for 2 hours, 0.39 ml (5.0 mmol) of N,N-dimethylformamide was added thereto. The resulting mixture was stirred at the same temperature for 30 minutes and further stirred at 0° C. for 30 minutes. To the reaction mixture was added saturated ammonium chloride, and the mixture was extracted with chloroform. The organic layer was washed with brine and then concentrated. The residue was purified by a silica gel column chromatography (eluent: hexane/ethyl acetate=9/1 to 1/1) to give the title compound.

Aufarbeitung

  1. customat −78° C
  2. stirringThe resulting mixture was stirred at the same temperature for 30 minutes
  3. stirringfurther stirred at 0° C. for 30 minutes
  4. extractionthe mixture was extracted with chloroform
  5. washThe organic layer was washed with brine
  6. concentrationconcentrated
  7. customThe residue was purified by a silica gel column chromatography (eluent: hexane/ethyl acetate=9/1 to 1/1)

Quellen und Nachweise

ORD-Eintrag
ord-38054f819b814ab2a2456e7d7eec6692
Quelldatensatz
uspto-grants-2009_02
Patentnummer
US07491720B2

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