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Immobilization of Enantioselective Catalysts
Current research has extended this methodology to develop a new process, the alternating ROMP-assembly of three-dimensional catalyst-organic frameworks. One such three-dimensional catalyst organic framework was reused 25 times for the hydrogenation of 1’-acetonaphthone (TON = 1000 per run, 95% ee) without loss in activity or selectivity, and without detectable leaching of the catalyst metal centre into the product. This is the most reuses of any heterogenized chiral hydrogenation catalyst to date. Other group research in this area includes extending the current systems to enantioselective carbon-carbon bond forming reactions, as well as development of new frameworks using other catalysts and monomers.