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Quinoline → Ethyl 1,4 dimethyl-5-(rho-toluoyl)-pyrrole-2-acetate

HRID 1282361
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1282361
C([C:4]1[C:8]([CH3:9])=[C:7]([C:10]([C:12]2[CH:17]=[CH:16][C:15]([CH3:18])=[CH:14][CH:13]=2)=[O:11])[N:6]([CH3:19])[C:5]=1[CH2:20][C:21]([O:23][CH2:24][CH3:25])=[O:22])(O)=O.N1C2C(=CC=CC=2)C=CC=1>[Cr]([O-])([O-])=O.[Cu+2]>[CH3:19][N:6]1[C:7]([C:10]([C:12]2[CH:17]=[CH:16][C:15]([CH3:18])=[CH:14][CH:13]=2)=[O:11])=[C:8]([CH3:9])[CH:4]=[C:5]1[CH2:20][C:21]([O:23][CH2:24][CH3:25])=[O:22]
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

4

Edukt 2

HCID 7047QuinolineHCID 18424327Ethyl 3-carboxy-1,4-dimethyl-5-(p-toluoyl)-pyrrole-2-acetate

Produkt 1

HCID 18424313Ethyl 1,4 dimethyl-5-(rho-toluoyl)-pyrrole-2-acetate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 178505374HCID 178505374, VerbindungKatalysator

Reaktionsbedingungen

Temperatur
200 °C

Versuchsvorschrift

A solution of 33.0 g. (0.096 mole) of ethyl 3-carboxy-1,4-dimethyl-5-(p-toluoyl)-pyrrole-2-acetate in 200 ml. of quinoline with 0.1 g. copper chromite added is heated under nitrogen for 6 hours at 200° C., then for 30 minutes at 220° C. The quinoline is distilled off in vacuo. The residue is dissolved in ether and washed successively with dilute hydrochloric acid, dilute sodium hydroxide, and brine; dried over magnesium sulfate; and the solvent evaporated in vacuo to give a brown oily residue which crystallizes. It is recrystallized from methanol, sublimed at 150° C. (0.025 mm/Hg) and recrystallized from hexane to give ethyl 1,4-dimethyl-5-(p-toluoyl)-pyrrole-2-acetate as a white solid, m.p. 90-93° C.

Aufarbeitung

  1. distillationThe quinoline is distilled off in vacuo
  2. dissolutionThe residue is dissolved in ether
  3. washwashed successively with dilute hydrochloric acid, dilute sodium hydroxide, and brine
  4. dry with materialdried over magnesium sulfate
  5. customand the solvent evaporated in vacuo
  6. customto give a brown oily residue which
  7. customcrystallizes
  8. customIt is recrystallized from methanol
  9. customsublimed at 150° C.
  10. customrecrystallized from hexane

Quellen und Nachweise

ORD-Eintrag
ord-e11918b60dfe45b89a20d7d59d26a0ba
Quelldatensatz
uspto-grants-2002_09
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US06455703B2

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