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Updated: Mar 17, 2026

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
The Quest for Palladium-Catalysed Alkyl-Nitrogen Bond Formation
Kilian Muñiz1,2, Claudio Martínez1, Álvaro Iglesias1
1Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain.
High-oxidation-state palladium catalysis enables efficient vicinal diamination of alkenes. Reductive C-N bond formation from palladium(IV) intermediates occurs via a low-barrier, linear transition state.
Area of Science:
- Organic Chemistry
- Catalysis
- Organometallic Chemistry
Background:
- Transition-metal catalysis is crucial for organic synthesis.
- Vicinal diamination of alkenes is a synthetically valuable transformation.
- Palladium catalysis has been extensively explored for C-N bond formation.
Purpose of the Study:
- To investigate the role of high-oxidation-state palladium catalysis in alkene diamination.
- To elucidate the mechanism of C-N bond formation in these reactions.
- To detail contributions to palladium-catalyzed diamination reactions.
Main Methods:
- Exploration of palladium-catalyzed coupling reactions.
- Investigation of stoichiometric control experiments.
- Analysis of catalytic reaction pathways.
Main Results:
- Development of several successful diamination transformations using palladium.
- Identification of high-oxidation-state palladium catalysis as key for C-N bond formation.
- Demonstration of reductive C-N bond formation from palladium(IV) with low activation energy.
Conclusions:
- High-oxidation-state palladium catalysis is effective for alkene diamination.
- Reductive C-N bond formation from palladium(IV) proceeds through a linear transition state.
- This work consolidates understanding of palladium-catalyzed vicinal diamination mechanisms.
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