Piperazine → 1,4-Piperazinediacetonitrile

HRID 45696Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 45696
[NH:1]1[CH2:6][CH2:5][NH:4][CH2:3][CH2:2]1.C(=O)([O-])[O-].[K+].[K+].Br[CH2:14][C:15]#[N:16].[C:17](#[N:19])[CH3:18]>>[N:1]1([CH2:18][C:17]#[N:19])[CH2:6][CH2:5][N:4]([CH2:14][C:15]#[N:16])[CH2:3][CH2:2]1

Komponenten

5

Edukt 4

HCID 4837PiperazineHCID 6342Acetonitrile2×HCID 11430Potassium CarbonateHCID 11534Bromoacetonitrile

Produkt 1

HCID 2581991,4-Piperazinediacetonitrile

Versuchsvorschrift

To a solution of piperazine (6 g, 69.77 mmol, 1.00 equiv) in acetonitrile (150 mL) was added potassium carbonate (19.2 g, 139.13 mmol, 2.00 equiv) and the mixture was stirred. To this was added dropwise a solution of 2-bromoacetonitrile (16.7 g, 140.34 mmol, 2.00 equiv) in acetonitrile (100 mL) and the suspension was stirred for 4 h at room temperature. The solids were Filtered out and the resulting solution was concentrated under vacuum. The crude product was purified by re-crystallization from methanol resulting in 7.75 g (68%) of Intermediate 50.1 as a white solid.

Aufarbeitung

  1. stirringthe suspension was stirred for 4 h at room temperature
  2. filtrationThe solids were Filtered out
  3. concentrationthe resulting solution was concentrated under vacuum
  4. customThe crude product was purified by re-crystallization from methanol resulting in 7.75 g (68%) of Intermediate 50.1 as a white solid

Quellen und Nachweise

ORD-Eintrag
ord-973ea195ef5e41ec8af4edaad7a99865
Quelldatensatz
uspto-grants-2013_09
Patentnummer
US08541448B2

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