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Updated: Jul 23, 2025

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
Naphthalene-Based Polymers as Catalytic Supports for Suzuki Cross-Coupling
Elena S Bakhvalova1, Alexey V Bykov2, Mariia E Markova2
1Regional Technological Centre, Tver State University, Zhelyabova Str., 33, 170100 Tver, Russia.
Novel naphthalene-based polymers functionalized with -OH, -SO3H, and -NO2 groups were synthesized for the first time. These new materials efficiently catalyze Suzuki cross-coupling reactions with high conversion and selectivity.
Area of Science:
- Polymer Chemistry
- Catalysis
- Materials Science
Background:
- Naphthalene-based polymers offer unique structural properties.
- Functionalization of polymers can tune their catalytic activity.
- Palladium (Pd) is a crucial catalyst for cross-coupling reactions.
Purpose of the Study:
- To synthesize novel naphthalene (NA)-based polymers via one-stage Friedel-Crafts crosslinking.
- To investigate the impact of NA functionalization (-OH, -SO3H, -NO2) on polymer porosity and Pd distribution.
- To evaluate the catalytic performance of Pd-supported NA polymers in Suzuki cross-coupling.
Main Methods:
- One-stage Friedel-Crafts crosslinking for polymer synthesis.
- Functionalization of naphthalene units with hydroxyl, sulfonic acid, and nitro groups.
- Characterization of polymer porosity and Pd phase distribution.
- Testing catalytic activity in Suzuki cross-coupling of 4-bromoanisole and phenylboronic acid.
Main Results:
- Successful synthesis of NA-based polymers with varying functional groups.
- Demonstrated influence of functional groups on polymer porosity and Pd loading.
- Achieved high conversion (>95%) and selectivity (>97%) in Suzuki coupling using Pd-supported NA polymers.
- Catalysts effective under mild conditions (60 °C, ethanol-water).
Conclusions:
- Naphthalene-based polymers synthesized via Friedel-Crafts crosslinking are effective supports for palladium catalysts.
- Functionalization of the naphthalene backbone significantly impacts catalyst properties and performance.
- These novel catalytic systems show high efficiency and selectivity for Suzuki cross-coupling reactions.
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