Copper-Catalyzed Reactions of Alkenyl Boronic Esters via Chan–Evans–Lam Coupling/Annulation Cascades: Substrate Selective Synthesis of Dihydroquinazolin-4-ones and Polysubstituted Quinolines
作者:Yuge Li、Zifeng Cao、Zhijun Wang、Liang Xu、Yu Wei
DOI:10.1021/acs.orglett.2c02522
日期:2022.9.16
nucleophiles have been established, providing new approaches for one-pot assembly of azacycles. Following the Chan–Evans–Lam C–N couplings, the cyclization processes occur via divergent pathways based on the utilized substrates, affording hydroamination product dihydroquinazolin-4-ones or aromatization product quinolines. Via this one-pot C–N coupling/annulation cascade, the target substituted azacycles can
quinazolinone derivatives via tandem / hydrolysis / decarboxylation / cyclization and transesterificationreactions has been developed that works with a variety of 2-aminobenzamide and β-dicarbonyl compounds. This method requires mild conditions, and has demonstrated high catalytic activity, excellent yields, excellent chemoselectivity, and a broad substrate scope. Additionally, biocatalyzed decarboxylation does