| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 50363 | Catalysis Communications | 2015 | 6 Pages |
•Synthesis of palladium nanoparticles in ionic liquids•Thioether-phosphine stabilizers adapted to metal nanoparticles in ionic liquids•Pd-catalyzed C–C couplings and H-transfer multi-step reactions•The role of ionic liquids in multipath mechanisms for Pd-catalyzed reactions
Palladium nanoparticles stabilized by thioether-phosphine ligands (1–3) were used as catalytic precursors in Heck–Mizoroki cross-coupling and CC reduction reactions in ionic liquids. The ionic liquid [EMI][MeHPO3] (A) exhibited an important hydrogen donor/acceptor behavior depending on the reaction conditions. Tandem or parallel pathways for C–C coupling and H-transfer reactions were observed, leading to the coupled product trans-4-phenyl-3-buten-2-one (I) and the corresponding reduced partner 4-phenylbutan-2-one (II) pointing to a molecular-like catalytic reactivity of the process. When the reaction was carried out under hydrogen pressure and low temperature, the reduction to II was inhibited by the presence of thioether-phosphine ligands.
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