Assembly of Functionalized 3,4‐Fused Tricyclic Benzosultams via Radical‐Promoted Cascade Reactions

Abstract A tandem oxidative radical functionalization/annulation of N ‐acryloyl amino saccharin is disclosed. This strategy allows the facile construction of diversely functionalized 3,4‐fused tricyclic benzosultams that previously have not been reported. A wide range of functionalities were installed through the formation of C−C, C−S and C−P bond enabled by the respective radicals.