The masstransfer properties of mono‐ and ditopic β‐cyclodextrin‐based receptors have been evaluated in a biphasic palladium‐catalyzed Tsuji–Trost reaction and compared to one of the bestmass‐transferpromoters, namely the randomly methylated β‐cyclodextrin. While monotopic receptors appeared to be poor mass‐transferpromoters of long alkyl chain allyl carbonates or urethanes, cooperative effects
Carbon, on active duty: The addition of activatedcarbon into the reaction medium appears to be a simple and efficient method to solve mass‐transfer limitations in aqueousorganometalliccatalysis (see figure).