Photochemical Synthesis of S,N,O-Containing Polyheterocycles via an α-C(sp<sup>3</sup>)–H Functionalization/Radical Cyclization Cascade
Shiyan Cheng, Jia-Bin Liao, Yu‐Mei Lin, Lei Gong
Abstract
A highly effective approach based on an organophotocatalytic α-C(sp 3 )–H functionalization/radical cyclization cascade has been developed. This method enables the synthesis of various tricyclic heterocycles containing S, O, and N atoms with excellent site selectivity and diastereoselectivity. Mechanistic investigations have confirmed that the reaction involves photoredox-triggered C(sp 3 )–H cleavage followed by a radical cyclization and aromatization process. These findings are expected to pave the way for developing cost-effective tandem radical reactions and synthesizing heterocyclic drugs.
Topics & Concepts
ChemistryCascadeSurface modificationPhotochemistryRadical cyclizationStereochemistryMedicinal chemistryPhysical chemistryChromatographySulfur-Based Synthesis TechniquesCatalytic C–H Functionalization MethodsRadical Photochemical Reactions