Cu-Catalyzed decarboxylative annulation of N-substituted glycines with 3-formylchromones: synthesis of functionalized chromeno[2,3-b]pyrrol-4(1H)-ones

A novel protocol for the construction of chromeno[2,3 -b ]pyrrol-4(1 H )-ones (CMPOs) 3 from 3-formylchromones, and glycine derivatives via a cascade reaction was developed.