C–H silylation and boronation enabled by alkyne insertion/vinyl to aryl 1,5-palladium migration†

Abstract

1,n-Metal migration represents a powerful strategy for C–H functionalization that is otherwise difficult to achieve. Nevertheless, catalytic reactions involving 1,5-palladium migration have rarely been reported so far. Herein, an alkyne insertion/vinyl to aryl 1,5-palladium migration strategy has been disclosed for the α-C–H silylation and boronation of a naphthalene ring, thus achieving the transformation of alkyne-tethered naphthalene bromides to silylated and boronated benzo[f]isoquinolines and benzo[f]isochromenes in moderate to excellent yields.