internal alkyne into a sp2–sp3 C−C bond of simple benzylic alcohols was achieved using the rearrangement of a highly reactive vinyl cation intermediate to a stabilized allyl cation as the driving force for an unusual 1,3‐carbon shift reaction. In the presence of 10 mol % of Al(OTf)3 as a simple, inexpensive, and abundant catalyst, high selectivity for the rearrangement was achieved. The reaction scope