Fig. 1: Bioactivities, syntheses of 3-substituted benzofurans and SEDs for radical reactions.

a Commercial drugs containing 3-substituted benzofuran structures. b Typical methods for access to 3-substituted benzofurans. c Representative organic small molecular SEDs. d Heteroatom anions as SEDs for 3-heteroalkylbenzofuran synthesis (This Work).