Site‐Selective C(sp3)‐H Alkenylation Using Decatungstate Anion as Photocatalyst

Abstract Site‐selective C( sp 3 )‐H alkenylation was achieved under photo‐irradiation in the presence of a catalytic amount of decatungstate anion, W 10 O 32 4− . In this reaction, the radical addition/β‐scission sequence is successfully combined with photocatalytic C( sp 3 )‐H functionalization. The reaction using weaker C−H bonds such as those in THF revealed that the benzenesulfonyl radical itself underwent HAT directly from the C−H bond, and a decatungstate anion participated in a chain‐repairing step. magnified image