N-bromobutanimide → Ethyl 5-bromo-4-(p-chlorophenyl)pyrrole-3-carboxylate

HRID 1651698

Reaktionsgleichung

Reaktionsgleichung von HRID 1651698
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:9]([C:13]([O:15][CH2:16][CH3:17])=[O:14])=[CH:10][NH:11][CH:12]=2)=[CH:4][CH:3]=1.[Br:18]N1C(=O)CCC1=O>O1CCCC1>[Br:18][C:12]1[NH:11][CH:10]=[C:9]([C:13]([O:15][CH2:16][CH3:17])=[O:14])[C:8]=1[C:5]1[CH:6]=[CH:7][C:2]([Cl:1])=[CH:3][CH:4]=1

Komponenten

4

Edukt 2

HCID 67184N-bromobutanimideHCID 470434ethyl 4-(4-chlorophenyl)-1H-pyrrole-3-carboxylate

Produkt 1

HCID 15010185Ethyl 5-bromo-4-(p-chlorophenyl)pyrrole-3-carboxylateAusbeute 90.348,398 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

Ethyl 4-(p-chlorophenyl)pyrrole-3-carboxylate (1.6 g., 0.0064 mmol) is dissolved in tetrahydrofuran (40 mL). N-bromosuccinimide (1.14 g., 0.0064 mmol) is added in small portions at 25°-28° C. After the addition is complete, the solution is stirred overnight at room temperature. The solution is concentrated in vacuo and the solid residue partioned between water and ether. The ether layer is separated and dried over magnesium sulfate. Work-up of the ether extract leaves 1.9 g (90%) of a white solid which is purified by stirring with a mixture of 80/20 hexane/ethyl acetate. The insoluble solid (1.3 g, 62%) is collected and has m.p. 161°-164° C.

Aufarbeitung

  1. additionAfter the addition
  2. concentrationThe solution is concentrated in vacuo
  3. customThe ether layer is separated
  4. dry with materialdried over magnesium sulfate
  5. extractionextract

Quellen und Nachweise

ORD-Eintrag
ord-fc130aedf3ed4b838c554581ebb01c08
Quelldatensatz
uspto-grants-1990_05
Patentnummer
US04929634

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