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Updated: Dec 23, 2025

Facile Preparation of 2Z,4E-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
Published on: June 21, 2017
Allylic Oxidation of Ester-Substituted 1,4-Dienes
Lars E Sattler1,2, Gerhard Hilt2
1Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str. 4, D-35043 Marburg, Germany.
Selenium dioxide oxidation of acyclic dienes yields functionalized products. Reaction pathways depend on steric and electronic factors, producing allylic alcohols or divinyl ketones.
Area of Science:
- Organic Chemistry
- Catalysis
- Oxidation Reactions
Background:
- Acyclic 1,4-dienes are synthesized via cobalt-catalyzed hydrovinylation and Alder-ene reactions.
- These dienes serve as precursors for further chemical transformations.
Purpose of the Study:
- To investigate the selenium dioxide oxidation of acyclic 1,4-dienes.
- To explore the chemoselectivity and reaction pathways of this oxidation process.
- To synthesize novel functionalized dienes for subsequent reactions.
Main Methods:
- Cobalt-catalyzed hydrovinylation and Alder-ene reactions for diene synthesis.
- Selenium dioxide oxidation of the synthesized 1,4-dienes.
- Analysis of reaction products and mechanistic pathways.
Main Results:
- Chemoselective allylic oxidation occurred at the most electron-rich double bond.
- Reaction outcomes (double bond transposition or allylic oxidation) were dictated by steric hindrance.
- Products obtained include 2,4-diene-6-ols and divinyl ketones.
Conclusions:
- Selenium dioxide oxidation provides a versatile route to functionalized dienes.
- Steric and electronic properties of the diene influence the oxidation pathway.
- The synthesized compounds are suitable for further synthetic elaborations.
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