A mixed NCP pincer palladacycle as catalyst precursor for the coupling of aryl halides with aryl boronic acids

A facile synthesis of unsymmetrical biaryls via coupling reaction of aryl halides with sodium tetraphenylborate catalysed by MCM-41-supported thioether palladium(0) complex

Various functionalised unsymmetrical biaryls can be synthesised in high to excellent isolated yields via coupling reaction of aryl iodides or bromides with NaBPh4 catalysed by MCM-41-supported thioether palladium(0) complex. This palladium complex can be easily recovered and reused many times without loss of activity.

A Highly Efficient and Recyclable Pd(Pph3)4/Peg-400 System for Stille Cross-Coupling Reactions of Organostannanes with Aryl Bromides

Pd(PPh3)4 in PEG-400 is shown to be a highly efficient catalyst for the Stille cross-coupling reactions of various organotin compounds with aryl bromides. The reaction could be conducted at 80 °C using NaOAc as base, yielding a variety of biaryls, alkynes and alkenes in good to excellent yields. The isolation of the products was readily performed by extraction with petroleum ether and the Pd(PPh3)4/PEG-400 system could be easily recycled and reused five times without any significant loss of activity.

MCM-41-Immobilised Nitrogen and Sulfur Mixed Tridentate Palladium(0) Complex: A Highly Efficient and Recyclable Catalyst for the Suzuki Reaction of Aryl Bromides in Air

The novel MCM-41-immobilised nitrogen and sulfur mixed tridentate palladium(0) complex [MCM-41-2N,S-Pd(0)] was prepared from 3-(2-aminoethylamino)propyltrimethoxysilane by immobilisation on MCM-41, followed by reaction with thiophene-2-carboxaldehyde and PdCl2 and then reduction with hydrazine hydrate. This phosphine-free heterogeneous palladium(0) complex was a highly active catalyst for the Suzuki reaction of aryl bromides in air and could be recycled at least 8 times without significant loss of activity.

Palladium nanoparticles supported in a polymeric membrane: an efficient phosphine-free “green” catalyst for Suzuki–Miyaura reactions in water

Palladium(0) nanoparticles supported on a polymeric membrane, CA/Pd(0), were found to be a highly efficient “dip catalyst” (heterogeneous catalyst) for Suzuki–Miyaura cross-coupling reactions.