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Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions
Published on: March 20, 2014
Proton-catalyzed oxo-alkene coupling: 2-platinaoxetane formation
Nandita M Weliange1, Endre Szuromi, Paul R Sharp
1125 Chemistry, University of Missouri-Columbia, Columbia, Missouri 65211, USA.
A hydroxo complex facilitates the formation of 2-platinaoxetane from an oxo complex and norbornene. This reaction mechanism is crucial for understanding Wacker alkene oxidation processes.
Area of Science:
- Organometallic Chemistry
- Catalysis
Background:
- The Wacker oxidation is a vital industrial process for converting alkenes to aldehydes or ketones.
- Understanding the detailed mechanism of platinum-catalyzed alkene oxidation is essential for process optimization.
Purpose of the Study:
- To investigate the role of hydroxo complexes in the formation of platinaoxetane intermediates.
- To provide mechanistic insights into the Wacker alkene oxidation reaction.
Main Methods:
- Reaction of an oxo complex with norbornene in the presence of a hydroxo complex.
- Characterization of reaction intermediates, including protonated 2-platinaoxetane.
Main Results:
- The hydroxo complex (5) mediates the formation of 2-platinaoxetane (2) from oxo complex (1) and norbornene (NB).
- A facile reaction between the hydroxo complex (5) and norbornene (NB) yields protonated 2-platinaoxetane (7).
Conclusions:
- The formation of platinaoxetane intermediates is supported by hydroxo complex mediation.
- These findings provide evidence for the involvement of such platinaoxetane pathways in the Wacker alkene oxidation mechanism.
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