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The present study describes the synthesis and characterization of dispersible copper nanoparticles on a PLA-TiO2 particle brush and their catalytic efficiency in conducting sequential reactions. The prepared CuNP@PLA-TiO2 was characterized using various techniques like SEM, TEM, EDAX, FT-IR, TGA, XRD and UV-vis spectroscopy. The support controlled the size of the nanoparticles between 2-6 nm and prevented their agglomeration during catalysis. A zeta potential of -70.3 mV was measured for the dispersed catalyst, which indicated its high stability in solution. The nanoparticles were effectively used for the synthesis of biphenyl amines from nitro arenes by sequentially carrying out reduction and N-arylation in a single pot. The short reaction time of N-arylation and recyclability are the hallmark of the developed catalytic system.

Diarylamines are obtained directly from sulfinamides through a novel rearrangement sequence. The transformation is transition metal-free and proceeds under mild conditions, providing facile access to highly sterically hindered diarylamines that are otherw

In the present study, we investigate the synthesis and catalytic activity of copper nanoparticles (CuNPs) stabilized onto a novel nitro functionalized polystyrene resin. The deposited nanoparticles were characterized by various analytical techniques and TEM images, revealed uniformly distributed copper nanoparticles of sizes 3–9?nm. We effectively used the resin impregnated CuNPs for [Formula presented] coupling of various aromatic amines with aryl halides and for the oxidative [Formula presented] homocoupling of phenyacetylene. Further, recycling of the catalyst, leaching of metal ions and post reaction changes in the support were studied and it was concluded that the support acts as oxidant during the homocoupling of phenyl acetylene which is oxidative by nature.

We report the first total synthesis of murrastifoline B and an improved route to murrastifoline F using a twofold palladium-catalyzed Buchwald-Hartwig amination as key step. The monomeric carbazole and the biaryl precursor are also prepared via palladium-

Possible occurrence of the photo-Smiles rearrangement accompanying meta-favoring nucleophilic aromatic substitution was examined in a homologous series of 1-(2-methoxy-4-nitrophenoxy)-ω-anilinoalkanes.The structure of reaction products, the reaction kinet