Visible light induced 3-position-selective addition of arylpropiolic acids with ethers via C(sp3)-H functionalization

Org Biomol Chem. 2020 May 6;18(17):3258-3262. doi: 10.1039/d0ob00480d.

Abstract

Although the 2-position-selective decarboxylative coupling or addition of arylpropiolic acids with cyclic ethers has been intensively investigated, selective functionalization of arylpropiolic acids at the 3-position is still a big challenge. Herein, an intriguing and mild method for visible light induced regioselective addition of arylpropiolic acids by attacking exclusively at the 3-position with cyclic/acyclic ethers was developed. A variety of 3,3-bis-substituted acrylic acids were successfully obtained in moderate to excellent yields. A plausible reaction mechanism involving an energy transfer induced radical addition in the presence of visible light and photocatalyst was proposed.

Publication types

  • Research Support, Non-U.S. Gov't