1583244-06-7Relevant academic research and scientific papers
Metal alkylidene complexes comprising an unsymmetrical unsaturated NHC ligand
-
Paragraph 0092, (2015/01/18)
The present invention relates to metal alkylidene complex comprising a 1-aryl-3-alkyl-imidazol-2-ylidene ligand, wherein the aryl group of said 1-aryl-3-alkyl-imidazol-2-ylidene ligand is an aromatic and wherein the alkyl group of said 1-aryl-3-alkyl-imidazol-2-ylidene ligand is selected from the group consisting of a cyclic secondary aliphatic alkyl and a C2-C10-heteroalkyl, and wherein said metal is selected from the group consisting of Pd, Ag, Au, Ir, Rh, Cu, Ni, Mg, Zn, Ti, Pt and Fe, with the provision that the aryl group of said 1-aryl-3-alkyl-imidazol-2-ylidene ligand is other than an ortho-hydroxyaryl group when said metal is Pd and when said cyclic secondary aliphatic alkyl is cyclohexyl.
Multicomponent synthesis of unsymmetrical unsaturated N-heterocyclic carbene precursors and their related transition-metal complexes
Queval, Pierre,Jahier, Claire,Rouen, Mathieu,Artur, Isabelle,Legeay, Jean-Christophe,Falivene, Laura,Toupet, Loic,Crevisy, Christophe,Cavallo, Luigi,Basle, Olivier,Mauduit, Marc
supporting information, p. 14103 - 14107 (2014/01/06)
A low-cost, modular, and easily scalable multicomponent procedure affording access in good yields and excellent selectivity (up to 93 %) to a wide range of (a)chiral unsymmetrical 1-aryl-3-cycloalkyl-imidazolium salts is disclosed. Electronic and steric properties of the corresponding unsymmetrical unsaturated N-heterocyclic carbene (U2-NHC) ligands were evaluated and evidenced strong electron donor ability, high steric discrimination, and modular steric demand. A low-cost, modular, and easily scalable multicomponent procedure, affording access to a wide range of (a)chiral unsymmetrical 1-aryl-3-cycloalkyl- imidazolium salts in good yields and excellent selectivities, is disclosed. Electronic and steric properties of the corresponding unsymmetrical unsaturated N-heterocyclic carbene (U2-NHC) ligands were evaluated and evidenced strong electron-donor ability, high steric discrimination, and modular steric demand. Copyright
