“…The palladium-catalyzed hydroesterification of styrene and other derivatives in a biphasic IL medium composed of 1-butyl-3-methylimidazolium tetrafluoroborate ([C 4 mim][BF 4 ]), isopropanol, and cyclohexane has been previously reported [19]; however, [C 4 mim] [BF 4 ] was the only IL studied and recycling of the catalyst was not achieved. Additionally, the palladium-catalyzed hydroesterification of aryl halides and tert-butyl alcohol in ILs to give the corresponding esters has been reported [20,21]. Our group, and others, recently reported the palladium-catalyzed co-polymerization of styrene and CO in ILs [22][23][24] where the polymerization occurs with catalysts supported by chelating ligands.…”