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Fünfkomponentensynthese von Triazolylchinoxalinen

Fünfkomponentensynthese von Triazolylchinoxalinen

          
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About the Book

Bachelorarbeit aus dem Jahr 2017 im Fachbereich Chemie - Organische Chemie, Note: 1,3, Heinrich-Heine-Universität Düsseldorf, Sprache: Deutsch, Abstract: In dieser Arbeit wurde das Konzept der MCR zur Etablierung einer Synthese von 2-Triazolylchinoxalinen angewendet. Die von Merkt konzeptionierte diversitätsorientierte Fünfkomponentensynthese, welche auf der Synthese von 3-Ethinylchinoxalinen basiert, sollte auf ihr synthetisches Potenzial hin untersucht werden. Heutzutage wird nahezu jeder Bereich des alltäglichen Lebens durch Entwicklungen der Chemischen Industrie beeinflusst und Produkte der Organischen Chemie sind fest in unseren Alltag integriert. In Zeiten der Globalisierung, zunehmender Ressourcenknappheit sowie einem zunehmenden Bewusstsein zur Umweltschonung steigen jedoch auch die Anforderungen an Organische Synthesen. Unter diesen Gesichtspunkten wurde bereits 1975 das Konzept der "idealen Synthese" von Hendrickson entwickelt. Diese umfasst die Optimierung von Synthesekonzepten bezüglich der Faktoren: Einfachheit, Sicherheit, Umweltfreundlichkeit, Effizienz, Diversität, Selektivität, Zeit sowie Verfügbarkeit der Edukte. Das Konzept der Multikomponentenreaktion (MCR) entspricht diesem Syntheseansatz in vielen Aspekten und wurde erstmalig von Posner zusammengefasst. Multikomponentenreaktionen zeichnen sich definitionsgemäß dadurch aus, dass drei oder mehr Reaktanden in einem Reaktionsgefäß zu dem gewünschten Produkt umgesetzt werden. Dabei werden mindestens zwei neue Bindungen geknüpft und das Zielmolekül enthält Strukturelemente aller Ausgangskomponenten. Es handelt sich um eine Ein-Topf-Reaktion, bei der die Zwischenstufen in situ erzeugt werden und daher nur das finale Produkt isoliert und aufgearbeitet werden muss. Dies bietet gegenüber einer klassischen mehrstufigen Syntheseroute entscheidende Vorteile. MCR sind zeitsparend, ressourcen-schonend, und erzielen im Vergleich zu klassischen Mehrstufensynthesen oftmals eine höhere Gesamtausbeute, da d


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Product Details
  • ISBN-13: 9783346009791
  • Publisher: Grin Verlag
  • Publisher Imprint: Grin Verlag
  • Height: 210 mm
  • No of Pages: 84
  • Spine Width: 5 mm
  • Width: 148 mm
  • ISBN-10: 3346009793
  • Publisher Date: 07 Aug 2019
  • Binding: Paperback
  • Language: German
  • Returnable: N
  • Weight: 122 gr


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