Magnetic nanoparticles conjugated to chiral imidazolidinone as recoverable catalyst
Source abstract
Abstract
The immobilization of an ad hoc designed chiral imidazolidin-4-one onto iron oxide magnetic nanoparticles (MNPs) is described, to afford MNP-supported MacMillan’s catalyst. Morphological and structural analysis of the materials, during preparation, use, and recycle, has been carried out by transmission electron microscopy. The supported catalyst was tested in the Diels–Alder reaction of cyclopentadiene with cinnamic aldehyde, affording the products in good yields and enantiomeric excesses up to 93 %, comparable to those observed with the non-supported catalyst. Recovery of the chiral catalyst has been successfully performed by simply applying an external magnet to achieve a perfect separation of the MNPs from the reaction product. The recycle of the catalytic system has been also investigated. Noteworthy, this immobilized MacMillan’s catalyst proved to be able to efficiently promote the reaction in pure water.
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Research context
OpenAlex topics: Surface Chemistry and Catalysis · Asymmetric Hydrogenation and Catalysis · Synthetic Organic Chemistry Methods
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References (43)
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