Potassium Carbonate → 3-[3-[4-(2-pyridinyl)-1-piperazinyl]propyl]-5-nitro-1H-indole

HRID 53148

Reaktionsgleichung

Reaktionsgleichung von HRID 53148
Br[CH2:2][CH2:3][CH2:4][C:5]1[C:13]2[C:8](=[CH:9][CH:10]=[C:11]([N+:14]([O-:16])=[O:15])[CH:12]=2)[NH:7][CH:6]=1.[N:17]1[CH:22]=[CH:21][CH:20]=[CH:19][C:18]=1[N:23]1[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]1.C([O-])([O-])=O.[K+].[K+]>C(#N)C>[N:17]1[CH:22]=[CH:21][CH:20]=[CH:19][C:18]=1[N:23]1[CH2:24][CH2:25][N:26]([CH2:2][CH2:3][CH2:4][C:5]2[C:13]3[C:8](=[CH:9][CH:10]=[C:11]([N+:14]([O-:16])=[O:15])[CH:12]=3)[NH:7][CH:6]=2)[CH2:27][CH2:28]1

Komponenten

5

Edukt 3

HCID 11430Potassium CarbonateHCID 944591-(2-Pyridyl)piperazineHCID 199620433-(3-Bromopropyl)-5-nitro-1H-indole

Produkt 1

HCID 199620423-[3-[4-(2-pyridinyl)-1-piperazinyl]propyl]-5-nitro-1H-indoleAusbeute 39,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6342AcetonitrileLösungsmittel

Versuchsvorschrift

A mixture of 3-[3-bromopropyl]-5-nitro-1H-indole (1.4 g, 4.2 mmol), 1-(2-pyridinyl)-piperazine, (0.98 g, 5.09 mmol) and K2CO3 (1.4 g, 10.2 mmol) in 30 mL of acetonitrile was heated to reflux for 4 h. The reaction mixture was cooled, the solvent was removed and the residue dissolved in ethyl acetate and water. The aqueous layer was separated and extracted with ethyl acetate. The organic extracts were dried (MgSO4) and concentrated, and the gummy residue purified by flash silica gel chromatography (5% methanol in dichloromethane) to give 3-[3-[4-(2-pyridinyl)-1-piperazinyl]propyl]-5-nitro-1H-indole, (0.6 g, 36%) as a yellow solid: IR(KBr) 3182, 1520, 1330 cm-1 ; 1H NMR (DMSO-d6, 300 MHz) δ8.52 (d, J=2.24 Hz, 1H), 8.80 (dd, J=1.8, 4.8 Hz, 1H), 7.95 (dd, J=2.25, 9.0 Hz, 1H), 7.52-7.49 (m, 2H), 7.41 (s, 1H), 6.79 (d, J=8.6 Hz, 1H), 6.60 (t, J=6.6 Hz, 1H), 3.46 (t, J=4.7 Hz, 4H), 2.78 (t, J=7.4 Hz, 2H), 2.42 (t, J=5.0 Hz, 4H), 2.34 (t, J=6.9 HZ, 4H), 1.82 (dt, J=7.4, 6.9 Hz, 2H); MS (m/e) 365 (M+). Anal. Calcd for C20H23N5O2 : C, 65.73, H, 6.34, N 19.16; found C, 65.35, H, 6.26, N, 18.87.

Aufarbeitung

  1. temperaturewas heated
  2. temperatureto reflux for 4 h
  3. temperatureThe reaction mixture was cooled
  4. customthe solvent was removed
  5. dissolutionthe residue dissolved in ethyl acetate
  6. customThe aqueous layer was separated
  7. extractionextracted with ethyl acetate
  8. dry with materialThe organic extracts were dried (MgSO4)
  9. concentrationconcentrated
  10. customthe gummy residue purified by flash silica gel chromatography (5% methanol in dichloromethane)

Quellen und Nachweise

ORD-Eintrag
ord-5f20494e87c8408a88e8f1c8fd4a3e6c
Quelldatensatz
uspto-grants-1997_04
Patentnummer
US05618816

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