Abstract
Introduction: The protection of the hydroxyl group as formamides is a crucial initial step in pharmaceutical synthesis. Methods: In this study, we investigated the O-formylation of alcohols using dimethylfor-mamide (DMF) in a mixture with a new magnetic nanocomposite Fe3O4@Chitosan/POCl2-x. Results: The results demonstrate that this core-shell heterogeneous nanocomposite facili-tates the formation of alkylformate, yielding products with high efficiency ranging from 79% to 96% within a remarkably short reaction time of 1 to 12 hours at room temperature, depending on the substrate structure. Significantly, the presence of this nanocomposite ex-hibits remarkable selectivity, favoring the formylation of less hindered benzylic and ali-phatic primary alcohols. However, bulkier alcohols and phenols exhibit lower reactivity under these conditions and thiols do not react. The simplicity of the work-up procedure, combined with the magnetic recyclability, makes it reusable and environmentally friendly. Conclusion: This study highlights the efficacy of this novel magnetic nanocomposite in facilitating formylation reactions, emphasizing its potential for application in pharmaceu-tical synthesis and bio compounds. This is due to its attributes of non-toxic nature, stabil-ity, and significant advantages over conventional methodologies.
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