ortho-Diphenylphosphanylbenzoyl-dirigierte Hydroformylierung als Schlüsselschritt einer iterativen Polypropionatsynthese
eBook - PDF

ortho-Diphenylphosphanylbenzoyl-dirigierte Hydroformylierung als Schlüsselschritt einer iterativen Polypropionatsynthese

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  1. 242 pages
  2. English
  3. PDF
  4. Available on iOS & Android
eBook - PDF

ortho-Diphenylphosphanylbenzoyl-dirigierte Hydroformylierung als Schlüsselschritt einer iterativen Polypropionatsynthese

,

About this book

Die Rhodium-katalysierte Hydroformylierung eröffnet einen ökonomisch sehr interessanten Weg zur Einführung der präparativ wertvollen Aldehydfunktion unter vergleichsweise milden Bedingungen. Die Chemo- Regio- und Stereoselektivität kann dabei durch eine substratgebundene, Katalysator-dirigierende Gruppe kontrolliert werden; in diesem Fall die ortho-Diphenylphosphanylbenzoyl-Gruppe (o-DPPB).In dieser Arbeit wird eine regio- und stereoselektive Hydroformylierung von internen und terminalen Olefinen vorgestellt, welche direkten Zugang zum anti-Aldol-Retron gewährt.Durch nachfolgende Cuprat-Addition wird der entsprechende sekundäre Alkohol mit guter Diastereoselektivität erhalten; daran anschließend erfolgt eine Umesterung des o-DPPB-Esters, wodurch eine Wiederholung der vorhergehenden Schritte möglich ist. Durch diese neue Methode lassen sich Polypropionatketten in iterativer Weise aufbauen.

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Information

Publisher
Cuvillier Verlag
Year
2007
Print ISBN
9783867271448
eBook ISBN
9783736921443
Edition
1

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