the origin of chemoselectivity in the palladium‐catalyzed reactions of 2‐(dimethylphenylsilyl)phenyl triflates with or without an amino group at the 3‐position. The selective formation of a 5,10‐dihydrophenazasiline rather than a dibenzosilole from the substrate with an amino group at the 3‐position could be successfully explained by proposing a new 1,5‐palladium migration pathway that involves a neutral
catalysis. The reaction mechanism has been experimentally investigated and a catalytic cycle involving a C-H/C-H coupling through a new mode of 1,4-palladium migration with concomitant alkene stereoisomerization has been proposed.