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A magnetic nanoparticle supported N,N-diisopropylaminoacetamide (Fe3O4-DIPA) was developed forapplication as a magnetic recoverable, and reusable N,N-diisopropylethylamine equivalent. The Fe3O4nanoparticles were coated with a silica layer using the sol-gel method, followed by surface modificationwith 3-aminopropyltriethoxysilane. Subsequent acylation with chloroacetyl chloride and chlorine displacementwith diisopropylamine afforded Fe3O4-DIPA in 90% yield with a loading of 0.96 mmol/g. Theapplicability of Fe3O4-DIPA was demonstrated in the synthesis of amine derivatives cv sulfonation, acylation,and N-alkylation reactions. The desired products were obtained in excellent yields and puritiesafter scavenging the residual starting amines by treatment with silica-supported dichlorotriazine.Fe3O4-DIPA was readily recovered by separation using a magnet and could be reused several timeswithout significant loss of reactivity.
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