Copper‐Catalyzed Aromatization‐Driven Ring‐Opening Amination and Oxygenation of Spiro Dihydroquinazolinones
Wenke Li, Hong-Jie Miao, Jinhua Zhang, Xin‐Hua Duan, Li‐Na Guo
Abstract
Mild and inexpensive copper-catalyzed aromatization-driven ring-opening amination and oxygenation of spiro dihydroquinazolinones are presented, respectively. These protocols provide facile and atom-economical access to the aminated and the carbonyl-containing quinazolin-4(3H)-ones in good yields with good functional group compatibility, which are difficult to obtain by conventional methods. Remarkably, a telescoped procedure involving the condensation and the ring-opening/functionalization for simple cycloalkanone was found to be accessible. Mechanistic studies suggest a radical pathway for this transformation.
Topics & Concepts
AromatizationAminationChemistryCopperCatalysisRing (chemistry)Surface modificationCombinatorial chemistryAtom economyOrganic chemistryPhysical chemistryQuinazolinone synthesis and applicationsSynthesis and Biological EvaluationAsymmetric Hydrogenation and Catalysis