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Methylglyoxal → 1-(1-Ethoxycarbonyl-4-piperidinyl)-4-(4-fluorophenyl)-5-acetylimidazole

HRID 362617
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 362617
[CH:1](=O)[C:2]([CH3:4])=[O:3].[NH2:6][CH:7]1[CH2:12][CH2:11][N:10]([C:13]([O:15][CH2:16][CH3:17])=[O:14])[CH2:9][CH2:8]1.C1(C)C=CC(S([CH:27]([N+:35]#[C-:36])[C:28]2[CH:33]=[CH:32][C:31]([F:34])=[CH:30][CH:29]=2)(=O)=O)=CC=1.C([O-])([O-])=O.[K+].[K+]>CS(C)=O>[CH2:16]([O:15][C:13]([N:10]1[CH2:9][CH2:8][CH:7]([N:6]2[C:1]([C:2](=[O:3])[CH3:4])=[C:27]([C:28]3[CH:29]=[CH:30][C:31]([F:34])=[CH:32][CH:33]=3)[N:35]=[CH:36]2)[CH2:12][CH2:11]1)=[O:14])[CH3:17]
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

6

Edukt 4

HCID 880MethylglyoxalHCID 11430Potassium CarbonateHCID 100867Ethyl 4-amino-1-piperidinecarboxylateHCID 10827289a-Tosyl-(4-fluorobenzyl) isocyanide

Produkt 1

HCID 99507171-(1-Ethoxycarbonyl-4-piperidinyl)-4-(4-fluorophenyl)-5-acetylimidazole

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 679
Dimethyl Sulfoxide
Lösungsmittel

Versuchsvorschrift

To a solution of pyruvaldehyde (40% w/w solution in water, 6.6 mL, 7.8 g, 0.058 mol) in DMSO (100 mL) at ambient temperature was added ethyl 4-aminopiperidinecarboxylate (10 g,, 0.058 mol). After 10 min, α-(p-toluenesulfonyl)-4-fluorobenzylisonitrile (8.4 g, 0.029 mol) and K2CO3 (8.0 g, 0.058 mol) were added. After stirring for 18 h, the solution was partition between EtOAc and 3N HCl and the organic phase was washed with 3N HCl. The combined aqueous layers were neutralized with solid K2CO3 and extracted twice with EtOAc. The combined organics were washed with brine, dried (MgSO4) and concentrated in vacuo to give a brown oil which solidified upon standing. Flash chromatography eluting consecutively with 33%, 50% and 67% EtOAc in hexanes followed by trituration with ether afforded the title compound as a white solid; yield 3.5 g (23%).

Aufarbeitung

  1. customthe solution was partition between EtOAc and 3N HCl
  2. washthe organic phase was washed with 3N HCl
  3. extractionextracted twice with EtOAc
  4. washThe combined organics were washed with brine
  5. dry with materialdried (MgSO4)
  6. concentrationconcentrated in vacuo
  7. customto give a brown oil which
  8. washFlash chromatography eluting consecutively with 33%, 50% and 67% EtOAc in hexanes

Quellen und Nachweise

ORD-Eintrag
ord-23ab4fb49a324b7b9ab3a2657f831fb4
Quelldatensatz
uspto-grants-1999_02
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US05869660

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