Immobilized Palladium Nanoparticles on Zirconium Carboxy-Aminophosphonates Nanosheets as an Efficient Recoverable Heterogeneous Catalyst for Suzuki–Miyaura and Heck Coupling

Catalysts

Luigi Vaccaro¹  Oriana Piermatti¹  Vadym Kozell¹  Tommaso Giannoni¹  Morena Nocchetti²  Riccardo Vivani² 

[1] CEMIN—Dipartimento di Chimica, Biologia e Biotecnologie University of Perugia, Via Elce di Sotto, 8, 06123 Perugia, Italy;Dipartimento di Scienze Farmaceutiche, University of Perugia,Via del Liceo 1, 06123 Perugia, Italy;

关键词: zirconium phosphonates;    nanosheets;    palladium nanoparticles;    heterogeneous catalysis;    Heck reaction;    Suzuki–Miyaura coupling;   

DOI  :  10.3390/catal7060186

来源: DOAJ

【 摘 要 】

Zirconium phosphate glycine diphosphonate nanosheets (ZPGly) have been used as support for the preparation of solid palladium nanoparticles, namely Pd@ZPGly. Thanks to the presence of carboxy-aminophosponate groups on the layer surface, ZPGly-based materials were able to stabilize a high amount of palladium (up to 22 wt %) also minimizing the amount of metal leached in the final products of representative important cross-coupling processes selected for proving the catalysts’ efficiency. The catalytic systems have been fully characterized and used in low amounts (0.1 mol %) in the Suzuki–Miyaura and Heck cross-couplings. Moreover, the protocols were optimized for the use of recoverable azeotropic mixtures (aq. EtOH 96% or aq. CH3CN 84%, respectively) and in the flow procedure allowing one to isolate the final pure products, without any purification step, with very low residual palladium content and with a very low waste production.

【 授权许可】

Unknown