Dichloromethane → Methyl 5-(4-chlorophenylthio)pyrrole-3-carboxylate

HRID 1980974Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1980974
[NH:1]1[CH:5]=[CH:4][C:3]([C:6]([O:8][CH3:9])=[O:7])=[CH:2]1.C(Cl)Cl.[Cl:13][C:14]1[CH:19]=[CH:18][C:17]([S:20]Cl)=[CH:16][CH:15]=1>CCOCC>[Cl:13][C:14]1[CH:19]=[CH:18][C:17]([S:20][C:5]2[NH:1][CH:2]=[C:3]([C:6]([O:8][CH3:9])=[O:7])[CH:4]=2)=[CH:16][CH:15]=1

Komponenten

5

Edukt 3

HCID 6344DichloromethaneHCID 110844654-ChlorobenzenesulfenylchlorideHCID 12361759methyl 1H-pyrrole-3-carboxylate

Produkt 1

HCID 12897034Methyl 5-(4-chlorophenylthio)pyrrole-3-carboxylateAusbeute 26,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 3283Diethyl EtherLösungsmittel

Versuchsvorschrift

Methyl pyrrole-3-carboxylate (2.5 g., 20 mmole) was dissolved in 35 ml. of methylene chloride. p-Chlorobenzenesulfenyl chloride (4.0 g., 22 mmoles) was added dropwise over approximately 2 minutes, and the reaction mixture was stirred at room temperature for 1 hour. Two volumes of ether were added, the mixture extracted twice with 20 ml. portions of water and the organic layer evaporated in vacuo. The resulting oil was chromatographed on 100 g. of silica gel with approximately 25 ml. fractions of the ethyl acetate-1/hexane-7 eluant collected. Fractions 19 to 36 were combined and concentrated to yield methyl 5-(4-chlorophenylthio)pyrrole-3-carboxylate (1.4 g., m.p. 122°-124° C.).

Aufarbeitung

  1. extractionthe mixture extracted twice with 20 ml
  2. customportions of water and the organic layer evaporated in vacuo
  3. customThe resulting oil was chromatographed on 100 g
  4. customfractions of the ethyl acetate-1/hexane-7 eluant collected
  5. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-89eb65ac0fb346ba942834ad13ae9d2b
Quelldatensatz
uspto-grants-1985_04
Patentnummer
US04511576

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