Palladium-catalyzed cross-coupling of PhSeSeBu3 with aryl and alkyl halides in ionic liquids: a practical synthetic method of diorganyl selenides

摘要

Palladium-catalyzed cross-coupling reactions of phenyl tributylstannyl selenide with aryl and alkyl halides can proceed smoothly in room temperature ionic liquid, l-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]), to give the corresponding diorganyl selenides in good to high yields. The coupling reaction run in [bmim][PF6] has the advantages of rate acceleration and increase of yield in contrast to the reaction run in toluene. Our system not only avoids the use of easily volatile toluene as a solvent but also solves the basic problem of palladium catalyst reuse.