Couvertures de journaux

  
  Mélanie Platon, Luchao Cui, Sophal Mom, Philippe Richard, Mark Saeys and Jean-Cyrille Hierso
Advanced Synthesis & Catalysis, 2011
doi: 10.1002/adsc.201100481
Article
 Etherification of Functionalized Phenols with Chloroheteroarenes at Low Palladium Loading: Theoretical Assessment of the Role of Triphosphane Ligands in C-O Reductive Elimination






 
Michèle Azouri, Jacques Andrieu, Michel Picquet, Philippe Richard, Bernard Hanquet, Igor Tkatchenko
European Journal of Inorganic Chemistry, 2007, 4877-4883
Article


Straightforward Synthesis of Donor-Stabilised Phosphenium Adducts
from Imidazolium-2-carboxylate and Their Electronic Properties


The cover Jeux de maquillage Jeux de Habillage picture shows one of donor-stabilized phosphenium compounds which have been obtained by direct addition of chlorophosphanes to the 1,3-dimethylimidazolium-2-carboxylate without any further purification step. Their stronger -acceptor character similar to Jeu phosphites and their ionic nature render these ligands very promising in the development of new continuous-flow catalytic processes. Details of phosphorylation mechanisms of imidazolium-2-carboxylate as well as the electronic and steric properties of these adducts are discussed in the article.


 


Jean-Cyrille Hierso, Matthieu Beaupérin, Philippe Meunier
European Journal of Inorganic Chemistry, 2007, 3767-3780
Review


Ultra-Low Catalyst Loading as a Concept in Economical and Sustainable Modern Chemistry: The Contribution of Ferrocenylpolyphosphane Ligands

The cover picture shows an X-ray illustration of the multidentate ferrocenylpolyphosphane 1,1',2,2'-tetrakis(diphenylphosphanyl)-4,4'-di-tert-butylferrocene. The cisoid conformation of the molecule, evidenced at the solid state, is conserved in solution; the phosphorus arrangement led to a rarely demonstrated multiple-coordination behaviour towards palladium, possibly useful in ultra-low catalyst loading reactions due to an improved stabilization of the metal atom. The multiple phosphane arms and their orientation resemble the elegant and intelligent creature that is the Giant Pacific Octopus (specimen from the Alaska SeaLife Centre in Seward, photo published with the kind permission of Mollie Tubbs and Jason Wettstein). The catalytic performance in palladium cross-coupling at ultra-low catalyst loading is presented in the Microreview.

ICMUB (UMR CNRS 6302) - Université de Bourgogne - Faculté des Sciences Mirande - Dijon (France)