Amine‐Catalyzed Copper‐Mediated C−H Sulfonylation of Benzaldehydes via a Transient Imine Directing Group**

Transient directing groups (TDGs) can provide a powerful means for C-H functionalization without requiring additional steps for directing group introduction and removal. We report the first use of a TDG in combination with copper to effect C-H functionalization. The regioselective copper mediated β-C(sp