Synthesis of N-heterocyclic compounds using N,N-dimethylacetamides as an electrophilic carbon source†

In this study, N-heterocyclic compounds were synthesized using nitrogen-containing nucleophilic substrates and electrophilic carbon sources derived from N,N-dimethylacetamide (DMAc). Depending on the nucleophilic groups, N-heterocyclic compounds such as 4-quinazolinones, pyrrole-quinoxalines, and dihydro-benzothiadiazine dioxides were produced. Carbon, adjacent to the nitrogen in DMAc, was activated in the presence of FeCl₃·6H₂O and di-t-butyl peroxide (DTBP). This procedure was considered an economical synthetic method because it utilized iron catalysts and DMAc as an electrophilic carbon source and a solvent.