A magnetic nanoparticle supported N,N-diisopropylaminoacetamide (Fe3O4-DIPA) was developed for
application as a magnetic recoverable, and reusable N,N-diisopropylethylamine equivalent. The Fe3O4
nanoparticles were coated with a silica layer using the sol-gel method, followed by surface modification
with 3-aminopropyltriethoxysilane. Subsequent acylation with chloroacetyl chloride and chlorine displacement
with diisopropylamine afforded Fe3O4-DIPA in 90% yield with a loading of 0.96 mmol/g. The
applicability 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 purities
after 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 times
without significant loss of reactivity.