To cite this version:Lamia Boubakri, S. Yasar, V. Dorcet, T. Roisnel, Christian Bruneau, et al.. Synthesis and catalytic applications of palladium N-heterocyclic carbene complexes as efficient pre-catalysts for Suzuki-Miyaura A new palladium complex series with N-heterocyclic carbene (NHC), pyridine and phosphine ligands, (PdCl2(L)NHC (2ac)(L=NHC), (PdCl2(L 1 )NHC(3a-c)(L 1 =pyridine), (PdCl2(L 2 )NHC(4a-c)(L 2 =triphenylphosphine), were synthesised and fully characterized. The catalytic activities of these complexes were screened for the Sonogashira and Suzuki-Miyaura reactions between arylhalides and phenylacetylene, and phenylboronic acid, respectively. The results pointed out that carbene/phosphine complexes, 4a-c exhibited excellent catalytic activities as compared to 2a-c, 3a-c, and the well-known systems for palladium-catalysed Sonogashira reaction. The reactivity of 4a-c in these preliminary Sonogashira coupling tests seems higher than that of previously reported catalytic systems based on Pd(NHC) moities. These new palladium NHC complexes are among the first reported palladium catalysts that are efficient to catalyse the Sonogashira reaction from arylchloride substrates.

Exploring new materials with high stability and capacity is full of challenges in sustainable energy conversion and storage systems. Metal–organic frameworks (MOFs), as a new type of porous material, show the advantages of large specific surface area, high porosity, low density, and adjustable pore size, exhibiting a broad application prospect in the field of electrocatalytic reactions, batteries, particularly in the field of supercapacitors. This comprehensive review outlines the recent progress in synthetic methods and electrochemical performances of MOF materials, as well as their applications in supercapacitors. Additionally, the superiorities of MOFs-related materials are highlighted, while major challenges or opportunities for future research on them for electrochemical supercapacitors have been discussed and displayed, along with extensive experimental experiences.

Imidazolidinium, tetrahydropyrimidinium and benzimidazolium salts were prepared. Upon reaction with tBuOK, they generate carbene ligands, which were associated in situ to [RuCp*(MeCN)3]PF6 to produce ruthenium catalysts that are active for the substitution of allylic substrates by dimethyl malonate as a carbonucleophile and phenol. The influences of the N‐heterocyclic structures, as well as that of the benzylic N‐substituents, on the reactivity and regioselectivity were examined.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)