Sulfur Palladium Research Articles

ChemInform Abstract: A Facile Approach to Asymmetrical Biaryls via Coupling Reaction of Aryl Halides with Sodium Tetraphenylborate Catalyzed by MCM‐41‐Supported Sulfur Palladium(0) Complex.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

A facile approach to asymmetrical biaryls via coupling reaction of aryl halides with sodium tetraphenylborate catalyzed by MCM-41-supported sulfur palladium(0) complex

Various functionalized asymmetrical biaryls can be synthesized in high to excellent yields via coupling reaction of aryl iodides or bromides with NaBPh 4 catalyzed by MCM-41-supported sulfur palladium(0) complex. This palladium complex can be easily recovered and reused many times without loss of activity.

Heterogeneous Suzuki reaction catalyzed by MCM-41-supported sulfur palladium(0) complex

The MCM-41-supported sulfur palladium(0) complex has been synthesized from 3-(2-cyanoethylsulfanyl)propyltriethoxysilane via immobilization on MCM-41, followed by reacting with palladium chloride, and then the reduction with hydrazine hydrate. The complex has been characterized by powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) and it is a highly active catalyst for the heterogeneous Suzuki reaction affording a variety of biaryls in high to excellent isolated yields. Our system not only solves the basic problems of catalyst separation and recovery but also avoids the use of phosphine ligands.

XAFS, SAXS and HREM characterization of Pd nanoparticles capped with n-alkyl thiol molecules

We report a structural characterization of palladium nanoparticles, with an average diameter of 1.2 nm, capped with three different n-alkyl thiol molecules ( n=12, 16 and 18). For this purpose several experimental techniques were used, namely X-ray absorption fine structure (XAFS), small angle X-ray scattering (SAXS) and high-resolution electron transmission microscopy (HRTEM). SAXS and HRTEM results yielded the sizes of the Pd nanoparticles in each sample. The effects of sulfur–palladium interaction on the structural and electronic properties of the studied material were derived from XAFS results. This study indicates the presence of sulfurized palladium in the bulk of the three studied capped Pd nanoparticles. Slight variations in the degree of sulfidation were detected for nanoclusters with different thiol chain lengths.

A novel MCM-41-supported sulfur palladium(0) complex catalyst for Sonogashira coupling reaction

A novel MCM-41-supported sulfur palladium(0) complex was conveniently prepared from commercially available and cheap γ-mercaptopropyltriethoxysilane via immobilization on MCM-41, followed by reacting with palladium chloride and then the reduction with hydrazine hydrate. This complex exhibited excellent performance in Sonogashira coupling reaction.

ChemInform Abstract: An Efficient Coupling of Aryl Iodides with Terminal Alkynes Catalyzed by a Silica‐Supported Sulfur Palladium(0) Complex.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

An Efficient Coupling of Aryl Iodides with Terminal Alkynes Catalyzed by Silica-Supported Sulfur Palladium(0) Complex

A silica - supported sulfur palladium(0) complex was prepared by the direct ligand - exchange reaction of poly - γ - mercaptopropylsiloxane with Pd(PPh3)4. It was an efficient catalyst for the coupling of aryl iodides with terminal alkynes.

Butoxycarbonylation of aryl halides catalyzed by a silica-supported poly[3-(2-cyanoethylsulfanyl)propylsiloxane palladium] complex

M. Cai, C. Song and X. Huang, J. Chem. Soc., Perkin Trans. 1, 1997, 2273 DOI: 10.1039/A702085F