Quinazolinedione derivatives were obtained from 2-aminobenzoic acids and bench-stable
α-chloroaldoxime O-methanesulfonates via DMAP-catalyzed domino reactions under mild reaction conditions in one-pot fashion.
Chemical transformations involved nucleophilic substitution, Tiemann rearrangement,
and cyclic urea formation. The strength of nitrogen nucleophile of 2-aminobenzoic
acids and the high level of carbon electrophile of α-chloroaldoxime O-methanesulfonates were crucial for the reaction outcome. An application to synthesize
a quinazolinedione building block was introduced.
Key words
quinazolinediones - cylic ureas - organocatalysis - intramolecular C–N amide bond
formation - Tiemann rearrangement