59160-06-4Relevant academic research and scientific papers
Olefin cyclopropanation catalysed by half-sandwich ruthenium complexes
Tutusaus, Oscar,Delfosse, Sébastien,Demonceau, Albert,Noels, Alfred F,Nú?ez, Rosario,Vi?as, Clara,Teixidor, Francesc
, p. 983 - 987 (2002)
Ruthenium complexes of the type [RuX(Cp′)(PPh3)2] (X=Cl and H; Cp′=Cp, Cp*, indenyl, and carboranyl) efficiently catalyse olefin cyclopropanation with diazoesters, and the cis/trans stereoselectivity of the resulting cyclopropanes strongly depends on the Cp′ ligand. With [RuCl(Cp*)(PAr3)2] complexes, cyclopropanation competes with the formal carbene insertion into C-H vinyl bonds of styrene, whereas ring-opening metathesis polymerisation takes place with norbornene, lending support to the formation of ruthenium-carbene and ruthenacyclobutanes as intermediates in these reactions.
Cyclopropanation Catalysed by RuCl2(PPh3)3 and OsCl2(PPh3)3
Demonceau, A.,Lemoine, C. A.,Noels, A. F.,Chizhevsky, I. T.,Sorokin, P.V.
, p. 8419 - 8422 (2007/10/02)
OsCl2(PPh3)3 is a cyclopropanation catalyst using ethyl diazoacetate with a variety of activated alkenes; OsCl2(PPh3)3 is however less active than RuCl2(PPh3)3 for the decomposition of the diazo reagent and the subsequent cyclopropanation.
