There has been much interest in the development of heterogeneously catalyzed, aerobic selective oxidation (selox) routes to transform primary alcohols to aldehydes. Allylic aldehydes are valuable chemical intermediates and high-value components used in the perfume and flavorings industries, however, their commercial synthesis often proceeds via atom-inefficient alcohol oxidation by toxic or hazardous stoichiometric oxidants, which are economically disadvantageous and generate large quantities of harmful waste. We have recently developed a range of supported mono- and bimetallic palladium catalysts which are highly active and selective for the aerobic selective oxidation of allylic alcohols to their corresponding aldehydes under mild conditions.
In addition to controlling the composition and oxidation state of the metal components, we are also developing a range of hierarchical, meso-macrostructured architectures to ensure efficient mass-transport in the liquid phase and high dispersion of the active centres.
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