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

HRID 863644
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 863644
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 330 g. (0.096 mole) of ethyl 3-carboxy-1,4-dimethyl-5-(ρ-toluoyl)-pyrrole-2-acetate in 200 ml. of quinoline with 0.1 gm copper chromite added is heated under nitrogen for six hours at 200° C. then for 30 mins. 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-(ρ-toluoyl)-pyrrole-2-acetate as a white solid, M.P. 90°-93° C.

Aufarbeitung

  1. customat 220° C
  2. distillationThe quinoline is distilled off in vacuo
  3. dissolutionThe residue is dissolved in ether
  4. washwashed successively with dilute hydrochloric acid, dilute sodium hydroxide, and brine
  5. dry with materialdried over magnesium sulfate
  6. customand the solvent evaporated in vacuo
  7. customto give a brown oily residue which
  8. customcrystallizes
  9. customIt is recrystallized from methanol
  10. customsublimed at 150° C.
  11. customrecrystallized from hexane

Quellen und Nachweise

ORD-Eintrag
ord-717061ddf4814627bb64d636f22d94fc
Quelldatensatz
uspto-grants-1998_02
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US05721347

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