Abstract
The Lewis-acidity of a series of bis-cationic Pt(II)(aqua) complexes bearing phosphane ligands was exploited to catalyze the conversion of dihydroxyacetone to ethyl lactate. The Pt(II) complex bearing 1,2-bis(diphenylphosphanyl)ethane and triflate as counter anion showed high catalytic activity (TOF=530h−1) and chemoselectivity (>96%) at 70°C. On intercalating the latter precatalyst between the lamellae of Na-montmorillonite by a cationic exchange process, high chemoselectivity for ethyl lactate (>99%) at 70°C was observed, which was maintained in three consecutive catalytic runs.
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