Encaged palladium catalyst for Suzuki-Miyaura cross-coupling reaction in aqueous media

Encaging the complex PdCl2(py)2 gave a highly efficient and reusable catalyst for the Suzuki-Miyaura cross-coupling reaction.

Tao Li and colleagues from Huazhong University of Science and Technology, China, successfully encaged the PdCl2(py)2 complex in the interior space of hollow silicate-1 spheres.  This new material was then applied to the Suzuki-Miyaura cross-coupling reaction of various aryl halides and arylboronic acids in aqueous media.  Even at Pd loadings of 0.0188 mol%, the catalyst gave fast conversions to the desired products under mild conditions.  Notably, due to the ‘anti-leaching’ effect of the zeolitic shell surrounding the Pd species, the catalyst showed excellent stability and reusability and could be reused 10 times without any appreciable loss of activity. 

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PdCl2(py)2encaged in monodispersed zeolitic hollow spheres: a highly efficient and reusable catalyst for Suzuki–Miyaura cross-coupling reaction in aqueous media, Zhenhong Guan, Jianglin Hu, Yanlong Gu, Haojun Zhang, Guangxing Li and Tao Li, Green Chem., 2012, DOI: 10.1039/C2GC35302D

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