Abstract
AbstractMonolithic and packed‐bed reactors featuring immobilized catalysts are well‐precedented in continuous flow synthesis but can suffer from adverse pressure drops during use due to their small pore sizes and/or structural changes. Herein, we overcome this challenge with the synthesis of a structurally robust silica‐based monolith featuring pore sizes on the millimeter scale. The 3‐dimensional solid support structure is constructed from a polystyrene foam‐based template and features a functional group handle that can be modified to display a reactive catalyst. Here we functionalize the support with palladium(0) for hydrogenation reactions and a modified proline catalyst for the alpha functionalization of aldehydes. Both reactors showed good activity and excellent catalytic longevity when utilized under continuous flow conditions.magnified image
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