Cu(I)-mediated lactone formation in subcritical water: a benign synthesis of benzopyranones and urolithins A–C
摘要:
Benzopyranones were successfully synthesized using Cu(I)-mediated C-O bond formation in subcritical water. A number of benzopyranone derivatives including polymethoxy benzopyranones, benzopyranopyridones, cbromenoindolones, and furochromenones were synthesized in satisfactory yield. This methodology was further applied to synthesize the intestinal microbial metabolites, urolithins A, B, and C, which were found to exhibit potent antioxidant activity. (C) 2013 Elsevier Ltd. All rights reserved.
The chemoselective synthesis of phenanthridinones was studied using copper(I)- and palladium(II)-catalyzed CN bond formation with various bases, ligands, and solvents. Phenanthridinones were obtained from 2-halobiarylcarboxylates and amines in a one-pot reaction. The phenanthridinones and heterocyclic-fused lactam derivatives were accomplished using developed methods.