Tetraalkylammonium salt-based catalyst systems for directing Heck-type reactions. Arylation of allyltrimethylsilane

An appropriate selection of the [Pd/base/QX] catalyst systems allows one to direct at will the palladium-catalysed arylation of allyltrimethylsilane towards the formation of either (E)-1-aryl-3-(trimethylsilyl)-1-propene or 3-aryl-1-propene, by preventing or promoting efficiently the desilylation and the double bond migration.