Palladium-Catalyzed Four-Component Radical Cascade Carbonylation Access to 2,3-Disubstituted Benzofuran Derivatives

Org Lett. 2024 Sep 24. doi: 10.1021/acs.orglett.4c02960. Online ahead of print.

Abstract

Multicomponent radical tandem reactions have emerged as a crucial technique for synthesizing complex molecules in organic chemistry. In this study, we report a palladium-catalyzed four-component difluoroalkylative carbonylation of enynes and ethyl difluoroiodoacetate. This transformation proceeds through a multistep sequential reaction that introduces reactive difluoro and carbonyl groups while constructing the benzofuran skeleton. Moreover, a variety of valuable 2,3-disubstituted benzofuran derivatives were obtained in respectable yields with excellent functional group compatibility.