Abstract
Abstract Two squaramide-containing organo-polyoxometalates (POMs) have been prepared, which efficiently catalyze the addition of dicarbonyl derivatives onto nitroolefins. The POM surface enhances the reactivity of the squaramide, and the hybrid acts as a bifunctional catalyst, where the highly charged POM surface in the organic medium is a base, which deprotonates the nucleophile and the squaramide activates the nitroalkenes via H-bonds. This opens new perspectives to POM-based catalysis.
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