103500-16-9Relevant articles and documents
(OTf)2 as a homogeneous catalyst for the hydrogenation of biomass derived 2,5-hexanedione and 2,5-dimethyl-furan in aqueous acidic medium
Latifi, Elnaz,Marchese, Austin D.,Hulls, Margaret C.W.,Soldatov, Dmitriy V.,Schlaf, Marcel
supporting information, p. 4666 - 4679 (2017/10/13)
The complex [Ru(triphos)(CH3CN)3](OTf)2 is an effective catalyst for the hydrogenation of 2,5-hexanedione and 2,5-dimethyl-furan in aqueous acidic medium at temperatures between 150 and 200 °C realizing up to 96% combined yields of 2,5-hexanediol and 2,5-dimethyl-tetrahydrofuran with the product distribution being sensitive to the amount of acid co-catalyst (HOTf) present. For the furan, the reaction pathway is through an acid-catalyzed hydrolysis to the dione rather than direct hydrogenation of the ring. The hydrogenation of the dione shows a first order dependence on hydrogen pressure as determined by direct hydrogen uptake rate measurements at temperature and pressure (1.38-6.90 MPa at 150 °C) and is postulated to operate through a heterolytic activation of hydrogen gas by [Ru(H)x(triphos)(Y)y]n+ (Y = solvent, water, counter ion) species formed in situ by loss and hydrogenation of the nitrile ligands. In water the catalyst is deactivated by dimerization to [Ru2(μ-OH)3(triphos)2](OTf).
The ruthenium and iridium coordination chemistry of the tripodal ligand CH3C{CH2P(m-CF3-C6H4)2}3
Suelue, Mustafa,Venanzi, Luigi M.
, p. 70 - 79 (2008/10/08)
The ruthenium(II) complexes [Ru(CF3CO2)2(CF3triphos)], [Ru2(μ-Cl)3(CF3triphos)2]Cl, [RuH(CH3CN)2(CF3triphos)](CF3SO3) and (Ru(CH3CN)3(CF3triphos)](CF3SO3)2 (CF3triphos = CH3C{CH2P(m-CF3C6H4)2}3) were prepared and characterized. The iridium complexes [Ir(COD)(CF3triphos)](+), [IrCl(CO)(CF3triphos)], [Ir(CO)2(CF3triphos)](+), [IrCl3(CF3triphos)] and [IrCl3-n(-)(MeCN)n(CF3triphos)](CF3SO3)n (n = 1, 2 and 3) were also prepared and characterized. The coordination chemistries of these two elements withCF3triphos and with the unsubstituted ligand CH3C{CH2P(C6H5)2}3 (Htriph os) are compared. It is shown that, relative to Htriphos, CF3triphos (a)stabilizes the iridium(I) relative to the iridium(III) oxidation state and (b) its cationic complexes are stronger Lewis acids.
