Aerobic Ligand-Free Suzuki Coupling Reaction of Aryl Chlorides Catalyzed byIn Situ Generated Palladium Nanoparticles at Room Temperature

Solid-state NMR studies of non-ionic surfactants confined in mesoporous silica

This review gives an overview of current trends in the investigation of confined molecules such as higher alcohols, ethylene glycol and polyethylene glycol as guest molecules in neat and functionalized mesoporous silica materials. All these molecules have both hydrophobic and hydrophilic parts. They are characteristic role-models for the investigation of confined surfactants. Their properties are studied by a combination of solid-state NMR and relaxometry with other physicochemical techniques and molecular dynamics techniques. It is shown that this combination delivers unique insights into the structure, arrangement, dynamical properties and the guest-host interactions inside the confinement.

A fluorescent probe based on novel fused four ring quinoxalinamine for palladium detection and bio-imaging

An “off–on” fluorescent probe was designed to detect palladium of all the typical oxidation states (0, +2, +4) without additional additives.

Effect of Substrates on Catalytic Activity of Biogenic Palladium Nanoparticles in C-C Cross-Coupling Reactions

This work describes a practical methodology for C-C bond formation reactions with the aid of biogenic palladium nanoparticles, which are synthesized by using phytochemicals extracted from two common plant species. Comparative studies have been done on the activity of two plant species (Ocimum sanctum and Aloe vera) in generation of palladium nanoparticles via ex situ and in situ methods. The structural and morphological characteristics of the nanoparticles are examined by UV/visible spectroscopy, powder X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and transmission electron microscopy analyses. We have observed a significant influence of the substrates on the catalytic activity of the palladium nanoparticles in Sonogashira and Suzuki cross-coupling reactions.

One-pot regioselective synthesis of substituted pyrazoles and isoxazoles in PEG-400/water medium by Cu-free nano-Pd catalyzed sequential acyl Sonogashira coupling–intramolecular cyclization

Catalyst efficacy of in situ generated Pd-nanoparticles in the regioselective one-pot synthesis of substituted pyrazoles and isoxazoles via sequential coupling-cyclization methodology in environmentally benign medium is described.

N-Tosylhydrazone directed annulation via C–H/N–N bond activation in Ru(ii)/PEG-400 as homogeneous recyclable catalytic system: a green synthesis of isoquinolines

A green and sustainable methodology for the synthesis of isoquinolines using Ru(ii)/PEG-400 as homogeneous recyclable catalytic system and N-tosylhydrazone, a rarely explored directing group has been reported.

Recyclable glucose-derived palladium(0) nanoparticles as in situ-formed catalysts for cross-coupling reactions in aqueous media

Renewable sugar-derived palladium(0) nanoparticles (PdNPs) are effective as in situ formed catalysts for cross-coupling reactions in aqueous solutions.

Solvent effects in catalysis: rational improvements of catalysts via manipulation of solvent interactions

The interactions of solvents with catalysts, substrates and products all influence the rate and selectivity of reactions and should be considered to ensure a reaction is run under optimum conditions.

Room-temperature palladium-catalysed Suzuki–Miyaura coupling of arylboric acid with aryl chlorides

The first room-temperature Suzuki–Miyaura coupling of aryl-boronic acid with aryl chlorides catalyzed by a Pd(OAc)₂/NiXantphos-based system is communicated.

Pd and Pd–CuO nanoparticles in hollow silicalite-1 single crystals for enhancing selectivity and activity for the Suzuki–Miyaura reaction

Pd and Pd–CuO nanoparticles in hollow silicalite-1 single crystals for enhancing selectivity and activity for the Suzuki–Miyaura reaction, were successfully prepared by an “impregnation-dissolution-recrystallization” approach.

In situ generation of palladium nanoparticles: ligand-free palladium catalyzed pivalic acid assisted carbonylative Suzuki reactions at ambient conditions

Highly selective carbonylative Suzuki reactions of aryl iodides with arylboronic acids using an in situ generated nanopalladium system furnished products in high yields. The reactions were performed under ambient conditions and in the absence of an added ligand. The key to success is the addition of pivalic acid, which can effectively suppress undesired Suzuki coupling. The synthesis can be easily scaled up, and the catalytic system can be reused up to nine times. The nature of the active catalytic species are discussed.

Copper-catalyzed carbonylative Suzuki coupling of aryl iodides with arylboronic acids under ambient pressure of carbon monoxide

An efficient and ligandless nanocopper-catalyzed carbonylative cross-coupling of aryl iodides with arylboronic acids at ambient CO pressure in poly(ethylene glycol), has been developed.

Iron-catalyzed carbonylative Suzuki reactions under atmospheric pressure of carbon monoxide

The first highly effective ligandless iron-catalyzed carbonylative Suzuki reaction has been developed.