Dodecylsulfate Anion Embedded Layered Double Hydroxide Supported Nanopalladium Catalyst for the Suzuki Reaction

Abstract

Abstract The dodecylsulfate anion (DS − ) embedded layered double hydroxide (LDH) supported nanopalladium catalyst (LDH-DS-Pd 0 ) is a novel phosphine free recyclable heterogeneous catalytic system for palladium catalyzed Suzuki coupling reactions and has been prepared for the first time. The intercalation of DS − changed the interlayer spacing of LDH from a microsize to a mesosize (2.9 nm) range, which favors the diffusion of average sized organic molecules. The Pd 0 clusters obtained from the reduction of PdCl 4 2– -interlayered LDH were intercalated between the LDH layers and hence the growth of Pd 0 clusters was effectively hindered by the limited space created by the intercalation of DS − . This lipophilic catalyst was highly efficient in promoting the Suzuki reaction of aryl halides with phenylboronic acid. As a heterogeneous nanocatalyst, LDH-DS-Pd 0 could be reused five times without significant loss of catalytic activity.