Recyclable Pt/Glycerol-Catalytic System for Heterophase Hydrosilylation

This study introduces the development of highly efficient and simple recyclable catalysts for hydrosilylation using polyols as a medium for heterophase catalytic systems. The system consists of a commercially available platinum precatalyst – K2PtCl4, and a surplus green solvent – glycerol (Gly), which can be easily prepared by dissolving K2PtCl4 in Gly at r.t. under air. The method allows for at least 60 cycles with a quantitative yield of the anti-Markovnikov product in air at r.t.; the product can be isolated from the catalytic system by simple decantation. The reaction proceeds at a high rate (from 10 min per cycle) even with small catalyst loadings (0.001-0.1 mol% Pt).