Optically active complexes of transition metals (RhI, RuII, CoII and NiII) with 2-aminocarbonylpyrrolidine ligands. Selective catalysts for hydrogenation of prochiral olefins

Heterogeneous enantioselective epoxidation catalyzed by Mn(salen) complexes grafted onto mesoporous materials by phenoxy group

“…For the heterogeneous catalysts, the stereochemical communication may be enhanced or reduced by the grafting mode and the surface or nanopores of supports and the heterogeneous catalysts present the different ee values. Corma et al [23] showed that heterogeneous asymmetric hydrogenation on modified Rh/USY catalyst presents higher ee value and the increase in ee is attributed to the additional interaction of substrate and pore wall. The interaction between chiral ligand and substrate was enforced for catalysts immobilized in the layered materials, which may enhance the enantioselectivity in asymmetric reactions [3d].…”

Nanostructured biomimetic catalysts for asymmetric hydrogenation of enamides using molecular imprinting technology

“…However, less expensive metals such as Cu 2+ , Co 2+ and Ni 2+ have not been very effective in asymmetric synthesis [41]. One of the goals of this study is to see if these metals can be effective as enantioselective catalysts when combined with molecular imprinting.…”

Zeolites and Zeotypes as catalysts

“…It may reach a point when the framework is formed of only Si and oxygen, and then these zeolites can become hydrophobic materials which selectively adsorb non-polar rather than polar molecules. [91 Zeolites and zeotypes present channels and cuvities with diumeters within the range qfmolecular dimensions. This fact has important implications for catalytic phenomena.…”