Angelino Doppiu
Umicore
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Publication
Featured researches published by Angelino Doppiu.
Chemical Communications | 2011
César A. Urbina-Blanco; Simone Manzini; Jessica Pérez Gomes; Angelino Doppiu; Steven P. Nolan
An efficient synthetic protocol involving reactions between the free carbene and [RuCl(2)(PPh(3))(2)(Ind)] followed by addition of pyridine leads to the isolation of olefin metathesis active [RuCl(2)(L)(Py)(Ind)] (L = SIMes and SIPr) complexes. This novel approach circumvents the use of costly tricyclohexylphosphine.
Australian Journal of Chemistry | 2013
Wladimir Solodenko; Angelino Doppiu; René Frankfurter; Carla Vogt; Andreas Kirschning
Two Hoveyda type ruthenium metathesis precatalysts, Umicore M51 and Umicore M71 SIMES, were immobilized on commercial silica in a simple and fast procedure through direct interaction with the support surface. These precatalysts exhibited good activity in ring-closing, cross, and enyne metathesis reactions and were stable in terms of reusability to be used for consecutive runs under both batch and flow conditions. In non-polar media, the catalytic activity of the precatalysts is truly based on a heterogeneous species, and the contamination of the products with ruthenium was very low with respect to starting catalyst (0.003–0.01 %; 0.13–0.44 ppm). If necessary, such as in solvents like toluene, the ruthenium content can easily be reduced to levels below 0.5 ppm by treatment of the crude metathesis products with the commercial scavenger QuadraSil AP or by use of an additional QuadraSil AP scavenger cartridge under flow conditions.
Topics in Catalysis | 2014
Angelino Doppiu; Frédéric Caijo; Fabien Tripoteau; Savinien Bompard; Christophe Crévisy; Marc Mauduit
Olefin metathesis is a powerful catalytic reaction that has a huge potential in the pharmaceutical, polymer and specialty chemicals industries. Cost-effective industrial applications require large-scale availability of catalyst precursors which combine high activity, high selectivity and long life-time. Among the known numerous families of olefin metathesis catalysts, the Umicore M7-catalyst family represents a novel class of Hoveyda-type complexes showing excellent chemical stabilities and modular activity profiles. Relevant aspects related to their industrial synthesis as well as their catalytic performance in valuable olefin metathesis transformations are overviewed here.
Acta Crystallographica Section E-structure Reports Online | 2008
Jan W. Bats; Angelino Doppiu; Andreas Rivas Nass; A. Stephen K. Hashmi
The absolute configuration of the title compound, [Fe(C5H5)(C36H29OP2)], is Sp at the ferrocene group and S at the asymmetric C atom. Both P atoms have a trigonal–pyramidal conformation. There is a short intramolecular C—H⋯P contact with an H⋯P distance of 2.56 Å. The hydroxy group is involved in an intramolecular O—H⋯πphenyl interaction. The crystal packing shows five very weak intermolecular C—H⋯π contacts, with H⋯Cg distances between 3.26 and 3.39 Å (Cg is the centroid of a phenyl or cyclopentadienyl ring).
Acta Crystallographica Section E-structure Reports Online | 2011
Jan W. Bats; Jessica Pérez Gomes; Angelino Doppiu; A. Stephen K. Hashmi
The RuII atom in the title compound, [RuCl2(C15H10)(C18H15P)2]·2C4H8O, has a distorted square-pyramidal conformation. The P and Cl atoms are at the base of the pyramid and the Ru—Cindenylidene bond is in the axial position. The two Cl ligands and the two phosphane ligands are in trans positions. The Cl—Ru—Cl and P—Ru—P angles are 157.71 (2) and 166.83 (2)°, respectively. The two independent tetrahydrofuran (THF) solvent molecules are disordered. One THF molecule was refined using a split-atom model. The second THF molecule was accounted for by using program PLATON/SQUEEZE [Spek (2009 ▶). Acta Cryst. D65, 148–155]. The molecular conformation shows three intramolecular C—H⋯Cl contacts and two C—H⋯π interactions while the crystal packing features an intermolecular C—H⋯Cl contact and two very weak intermolecular C—H⋯π contacts.
Acta Crystallographica Section E-structure Reports Online | 2008
Jan W. Bats; Andreas Rivas Nass; Angelino Doppiu; Ralf Karch; A. Stephen K. Hashmi
The absolute configuration of the title molecule, [Fe(C5H5)(C38H34NP2)]·CHCl3, is R,R p. The molecular structure is similar to the structure of the solvent-free compound [Fukuzawa, Yamamoto & Kikuchi (2007 ▶). J. Org. Chem. 72, 1514–1517], but some torsion angles about the P—Cphenyl bonds differ by up to 25°. The P atoms and the N atom have a distorted trigonal-pyramidal geometry. The chloroform solvate group donates a C—H⋯π bond to the central benzene ring and is also involved in six intermolecular C—H⋯Cl contacts with H⋯Cl distances between 2.96 and 3.13 Å.
Organometallics | 2003
Eva Becker; Kurt Mereiter; Michael Puchberger; Roland Schmid; Karl Kirchner; Angelino Doppiu; Albrecht Salzer
Archive | 2009
Roland Winde; Ralf Karch; Andreas Rivas-Nass; Angelino Doppiu; Gerhard Peter; Eileen Woerner
Advanced Synthesis & Catalysis | 2012
Stefano Guidone; Enguerrand Blondiaux; Cezary Samojłowicz; Łukasz Gułajski; Mariusz Kędziorek; Maura Malińska; Aleksandra Pazio; Krzysztof Woźniak; Karol Grela; Angelino Doppiu; Catherine S. J. Cazin
Archive | 2009
Angelino Doppiu; Andreas Rivas-Nass; Ralf Karch; Roland Winde