Ruthenium Hydride Complex Supported on Gold Nanoparticle Cored Triazine Dendrimers for C-C Coupling Reactions

In this work, the unusual ability of a ruthenium hydride catalyst, [RuHCl(PPh3)(3)CO], supported on gold nanoparticle cored triazine dendrimers in the Suzuki-Miyaura cross-coupling reaction and also in the synthesis of diaryl ketones I. reported. [Ru-H@AuNPs-TD] was characterized by Fourier transform infrared spectroscopy, CHNS, TEM, SEM, ICP, and TGA analyses. The ruthenium hydride catalyst was used as, a heterogeneous catalyst for the C-C coupling reactions of aryl halides, with phenylboronic acids, and the biphenyl derivatives were produced in good to excellent yields. On the other hand, this catalytic system was applied for synthesis of diaryl ketones by the reaction of phenylboronic acids with substituted benzaldehydes. Moreover, this catalyst can be well-dispersed in the reaction medium, conveniently separated from the reaction mixture; and reused several times without significant loss of its activity.