Hydrosilylation of Aldehydes and Ketones Catalysed by Bis(phosphinite) Pincer Platinum Hydride Complexes

• DOI: 10.1002/adsc.202000166
• Publication Date: 2020-04-07T02:38:10Z
• Authors: Jiarui Chang; Fei Fang; Jie Zhang; Xuenian Chen
• Keywords: Hydrosilylation; Phenylsilane; Phosphinite

Abstract Bis(phosphinite) pincer platinum hydride complexes, [2,6‐(R 2 PO) C 6 H 3 ]PtH (R= t Bu, i Pr), were synthesized, characterized and applied to the hydrosilylation of aldehydes ketones. NMR study single crystal X‐ray diffraction analysis indicated that hydrides in these two complexes are comparatively less hydridic: down‐field 1 resonances (0.71 0.98 ppm) weak Pt−H interactions observed. Both found be good catalysts for ketones with phenylsilane. The corresponding alcohols isolated excellent yields following basic hydrolysis resultant products turnover frequencies (TOFs) up 3200 h −1 achieved at 60 °C toluene, which much higher than those catalysed by nickel complexes. A possible mechanism present process was discussed. magnified image