2-ACETYL-4-CHLOROTHIOPHENE

Gefahreninformationscode (GHS)

• Bildanzeige (GHS)

  

• Alarmwort

  Warnung

• Gefahrenhinweise

  H302：Gesundheitsschädlich bei Verschlucken.

  H312：Gesundheitsschädlich bei Hautkontakt.

  H331：Giftig bei Einatmen.

• Sicherheit

  P261：Einatmen von Staub vermeiden.

  P304+P340：BEI EINATMEN: Die Person an die frische Luft bringen und für ungehinderte Atmung sorgen.

  P405：Unter Verschluss aufbewahren.

2-ACETYL-4-CHLOROTHIOPHENE Chemische Eigenschaften,Einsatz,Produktion Methoden

• Beschreibung

  2-Acetyl-4-chlorothiophene is an oxychloride that belongs to the family of thiourea derivatives. It is synthesized by reacting phosphorus oxychloride with 2,3-dichloroacetophenone in a solvent such as dioxane or acetonitrile. The final product is purified by means of vacuum distillation and recrystallization from diethyl ether, hexane, and chlorinated hydrocarbons.

• Reaktionen

  Pd(OAc)2 catalysed the direct arylation of some functionalized halothiophene derivatives allowing the synthesis in only one step of polyfunctionalized arylated thiophenes. In the presence of 2-acetyl-4-chlorothiophene and various aryl bromides, the 5-arylation products were obtained in moderate to high yields employing only 0.5 mol% catalyst. Researchers studied the coupling of 2-acetyl-4-chlorothiophene with several aryl bromides employing 0.5 mol% Pd(OAc)2 as the catalyst and KOAc as the base. These phosphine-free catalyst reaction conditions allowed the successful coupling of several aryl bromides to more simple thiophene derivatives. Using such conditions, the 5-arylated thiophenes were obtained with high isolated yields. With this procedure, the priority for the arylation of this 2,4-disubstituted thiophene is the 5-position. Moreover, no formation of by-products, such as thiophene oligomers, due to the oxidative addition of this chlorothiophene to palladium was detected during these reactions[1]. 
  
  

• Einzelnachweise

  [1] Kassem Beydoun, Henri Doucet. “Palladium-catalyzed direct 5-arylation of formyl- or acetyl-halothiophene derivatives.” Journal of Organometallic Chemistry 696 9 (2011): Pages 1749-1759.

2-ACETYL-4-CHLOROTHIOPHENE Upstream-Materialien And Downstream Produkte

2-ACETYL-4-CHLOROTHIOPHENE Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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