89424-84-0Relevant articles and documents
Rhodium-NHC hybrid silica materials as recyclable catalysts for [2+2+2] cycloaddition reactions of alkynes
Fernndez, Mart,Ferr, Meritxell,Pla-Quintana, Anna,Parella, Teodor,Pleixats, Roser,Roglans, Anna
, p. 6242 - 6251 (2015/02/19)
Bis-silylated dihydroimidazolium salt 1 and monosilylated imidazolium salt 2 are transformed to (NHC)RhCl(COD) complexes 3 and 4, allowing the preparation of hybrid silica materials either by sol-gel or grafting processes. Full characterization of the materials by means of solid state NMR, N2-sorption measurements, thermogravimetric analysis (TGA) and elemental analysis was followed by evaluation of catalytic activity in the [2+2+2] cycloaddition of alkynes. Excellent yields of the cycloadducts are obtained for up to six consecutive cycles with the grafted material, using simple filtration to recover the catalyst. Both conventional and microwave heating prove effective for the process described.
Iridium(III)-catalyzed approach for the synthesis of fused arenes: Access to isoindolines, indanes, and dihydroisobenzofurans
Auvinet, Anne-Laure,Ez-Zoubir, Mehdi,Bompard, Savinien,Vitale, Maxime R.,Brown, Jack A.,Michelet, Veronique,Ratovelomanana-Vidal, Virginie
, p. 2389 - 2394 (2013/08/23)
A facile and efficient method for the synthesis of isoindoline, indane, and dihydroisobenzofuran derivatives has been developed through the application of a halogen-bridged iridium(III) complex to the [2+2+2] cycloaddition of α,ω-diynes with alkynes. The
Ruthenium carbene mediated [2+2+2] cyclotrimerizations
Mallagaray, álvaro,Medina, Sandra,Domínguez, Gema,Pérez-Castells, Javier
supporting information; experimental part, p. 2114 - 2118 (2010/10/03)
Second-generation Grubbs catalyst and Hoveyda-Grubbs catalyst are able to catalyze both crossed [2+2+2] cyclotrimerization of diynes with alkynes and di- or trimerizations of diynes. Selection of the reaction conditions allows us to favor one particular p