iodinanes, which undergo [3,3]-sigmatropic rearrangement. The lack of crossover products argues for the intramolecularity of the rearrangement. When both ortho positions of aryliodinanes are occupied with alkyl substituents, the reductive iodonio-Claisen rearrangement affords meta substitution products. This is the first to show that meta-Claisen rearrangementoccurs preferentially even when a free para
reported that an acid‐activated form of phenyliodine diacetate, PhI(OAc)2, undergoes a reaction with propargyl‐silanes, germanes and stannanes to give the ortho‐propargyl iodobenzene. This formal C−H alkylation was proposed to take place through an unusual (even to date) iodonio‐based [3,3] rearrangement of an intermediate allenylsilane. Although this mechanistic principle has been invoked in related