Piperazine → HCID 9858707, Verbindung

HRID 1793852Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1793852
[F:1][C:2]1[CH:3]=[C:4]([C:9]2[CH2:13][CH:12]([CH2:14][N:15]3[CH:19]=[CH:18][N:17]=[N:16]3)[O:11][N:10]=2)[CH:5]=[CH:6][C:7]=1F.C(=O)([O-])[O-].[K+].[K+].[NH:26]1[CH2:31][CH2:30][NH:29][CH2:28][CH2:27]1>>[F:1][C:2]1[CH:3]=[C:4]([C:9]2[CH2:13][CH:12]([CH2:14][N:15]3[CH:19]=[CH:18][N:17]=[N:16]3)[O:11][N:10]=2)[CH:5]=[CH:6][C:7]=1[N:26]1[CH2:31][CH2:30][NH:29][CH2:28][CH2:27]1

Komponenten

4

Edukt 3

HCID 4837PiperazineHCID 11430Potassium CarbonateHCID 11334553HCID 11334553, Verbindung

Produkt 1

HCID 9858707HCID 9858707, VerbindungAusbeute 93 %

Versuchsvorschrift

A mixture of (5RS)-3-(3,4-difluorophenyl)-5-(1,2,3-triazol-1-ylmethyl)-4,5-dihydroisoxazole (528 mg, 2 mM), potassium carbonate (414 mg, 3 mM), and piperazine (7.5 g) was heated under nitrogen at 130° for 4 hours. After cooling, the mixture was partitioned between water (150 ml) and ethyl acetate (150 ml). The organic extract was washed with sodium bicarbonate (75 ml), and brine (75 ml). After drying (magnesium sulfate) and evaporation, the desired product (614 mg) was obtained sufficiently pure without chromatography. MS (ESP): 331 (MH+) for C16H19FN6O NMR (DMSO-d6) δ: 2.81 (t, 4H); 2.97 (t, 4H); 3.20 (dd overlapped by H2O, 1H); 3.52 (dd, 1H); 4.58 (dd, 1H); 4.64 (dd, 1H); 5.08 (m, 1H); 7.02 (t, 1H); 7.30 (overlapping m, 2H); 7.70 (d, 1H); 8.11 (d, 1H); NH missing—exchanged.

Aufarbeitung

  1. temperaturewas heated under nitrogen at 130° for 4 hours
  2. temperatureAfter cooling
  3. customthe mixture was partitioned between water (150 ml) and ethyl acetate (150 ml)
  4. extractionThe organic extract
  5. washwas washed with sodium bicarbonate (75 ml), and brine (75 ml)
  6. customAfter drying
  7. custom(magnesium sulfate) and evaporation

Quellen und Nachweise

ORD-Eintrag
ord-27972a76efd4450da10761270248a017
Quelldatensatz
uspto-grants-2006_04
Patentnummer
US07022705B2

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