Asymmetric catalysis on solids

Abstract

The processing advantages associated with heterogeneous catalysis have led to the development of many new chiral heterogeneous catalysts for a variety of important asymmetric reactions. Established systems, such as chirally modified metals, have been further developed, while new strategies for the creation of chiral polymer catalysts and oxide systems, such as zeolites containing chelate complexes, are being explored. Important issues, such as site isolation, stability against leaching, and mass transfer to the active sites, have been addressed. Advances have been made in chiral zeolite frameworks and porous hybrid solids, chiral modifiers in porous hosts, asymmetric catalysts occluded in membranes and dissolved in supported liquid films, and modular chelate complexes on polymer beads.