Solid Supported Palladium(0) Nanoparticles: An Efficient Heterogeneous Catalyst for Regioselective Hydrosilylation of Alkynes and Suzuki Coupling of β-Arylvinyl Iodides

Soluble Pt Nanoparticles Stabilized by a Tris‐imidazolium Tetrafluoroborate as Efficient and Recyclable Catalyst for the Stereoselective Hydrosilylation of Alkynes

“…In the presence of water a competitive transfer hydrogenation took place to give the corresponding alkenes and/or alkanes . Other examples refer to palladium NPs supported on polystyrene resins for terminal alkynes and few 1,3‐diynes, Pd nanoparticles supported on N,O‐doped hierarchical porous carbon, supported palladium‐gold alloy NPs for α,β‐unsaturated ketones and alkynes, and SiO 2 supported palladium‐copper bimetallic NPs . In addition, supported rhodium, rhodium‐platinum and gold nanoparticles [11 ° ,p] have also been described as catalysts for the hydrosilylation of alkynes.…”

Hydroelementation of diynes

“…168 Palladium nanoparticles were also tested for single alkyne examples. 169,170 The hydrosilylation of conjugated symmetrical 1,3-diynes 1a, 13c, and 180c with mono-or dihydrosilanes 195a, 207a, 217 was carried out in the presence of various Ni(0) 218-220 or Rh(I) 221 complexes with the addition of different chiral or nonstereoselective ligands 222a-i. In all experiments, the silane was used in a 3.5 to 4.0-fold excess with respect to the diyne.…”

Catalytic Hydrofunctionalization Reactions of 1,3-Diynes

“…As in the previous examples, the reactions were, again, highly stereo-and regioselective, leading to the monosilylated enynes and disilylated dienes with exclusive E-stereochemistry (syn addition) and with the silicon atoms bonded to the internal carbons of the diynic units. In addition to PtO 2 and Pt/TiO 2 , other heterogeneous catalysts capable of promoting the hydrosilylation of 1,3-diynes quoted in the literature are: impregnated platinum on magnetite, i.e., PtO/PtO 2 -Fe 3 O 4 [65], Pd(0) nanoparticles supported on polymeric resins [66] or stabilized by imidazolium salts [67], Rh(0) nanoparticles stabilized by a nitrogen-rich polyethylene glycol (PEG) derivative [68] and a nickel(II)-containing porous organic polymer [69]. All of them showed an exquisite syn selectivity and, depending on the reaction conditions employed, led to the corresponding mono-or bis-addition products.…”