![Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-phosphinetriyltripiperidine]}palladium Under Mild Reaction Conditions](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F51444.jpg&w=3840&q=50)
First time exploration and characterization of key-intermediates in palladium-catalysed coupling reactions
Péter Szuroczki1,2,3, Attila Bényei4, Rafael T Aroso5
1Department of Inorganic Chemistry, University of Pécs, Ifjúság Útja 6., P.O.Box 266, 7624, Pécs, Hungary.
Scientific Reports
|March 19, 2026
Summary
Researchers characterized a novel Palladium(II) intermediate formed via oxidative addition of bromoporphyrin. This intermediate is crucial for understanding catalytic cycles in cross-coupling and carbonylation reactions.
Area of Science:
- Organometallic Chemistry
- Catalysis Research
- X-ray Crystallography
Background:
- Palladium catalysis is vital for cross-coupling and carbonylation reactions.
- Characterization of catalytic intermediates provides mechanistic insights.
- Previous studies lacked structural data for key Pd(II) intermediates in porphyrinyl complexes.
Purpose of the Study:
- To characterize the Pd(II) intermediate formed during the oxidative addition of bromoporphyrin.
- To elucidate the role of Xantphos hemioxide in the catalytic cycle.
- To provide structural evidence for catalytic intermediates in palladium-catalyzed reactions.
Main Methods:
- Oxidative addition of bromoporphyrin to a Pd(0) complex.
- X-ray crystallography for intermediate characterization.
- Heterobidentate coordination of Xantphos hemioxide.
Main Results:
- Successfully characterized a Pd(II) intermediate via X-ray crystallography.
- Identified the oxidized product responsible for Pd(II)-Pd(0) reduction.
- Isolated and characterized a novel Pd(P-P(O))X(porphyrinyl) complex.
Conclusions:
- The isolated species represents the initial oxidative addition step in a catalytic cycle.
- This finding offers new structural insights into palladium-catalyzed cross-coupling and carbonylation.
- Provides strong evidence supporting the proposed mechanisms of these important reactions.
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