Within the Green Chemistry context, one of the major challenges is the replacement of conventional
homogeneous catalysts by heterogeneous catalysts, which are easy to handle and usually recyclable since they
can be readily recovered. This paradigm change is becoming particularly significant with the development of zeolites,
either in their native acidic form or modified by metal ions, as catalysts in organic chemistry. Due to the current
burgeoning of this new field, the present review only covers some typical but representative aspects. Typical
reactions of carbohydrates and other acid-sensitive organic compounds can be catalyzed by H-zeolites, advantageously
replacing dangerous and toxic strong acids. Metal-doped zeolites can act as catalysts for various transformations.
Some cycloadditions, including the well-known 'click' reaction, and coupling, specially Cu-catalyzed
reactions. This new kind of heterogeneous catalysts can be recycled and reused, in sharp contrast to conventional
Keywords: Zeolites, heterogeneous catalysis, green chemistry, organic synthesis, copper, scandium, solid acids, transition metals.
Rights & PermissionsPrintExport