13556-58-6Relevant articles and documents
Quenched skeletal Ni as the effective catalyst for selective partial hydrogenation of polycyclic aromatic hydrocarbons
Liu, Chengyun,Rong, Zeming,Sun, Zhuohua,Wang, Yong,Du, Wenqiang,Wang, Yue,Lu, Lianhai
, p. 23984 - 23988 (2013/11/19)
Quenched skeletal Ni is an active and selective catalyst for selective partial hydrogenation of polycyclic aromatic hydrocarbons (PAHs). The molecular structure of PAHs significantly dominate the hydrogenation process and furthermore, the distribution of hydrogenated products.
Hydrocracking of Acenaphthene over a Sulfided Ni-Mo/Al2O3 Catalyst
Miki, Yasuo,Sugimoto, Yoshikazu
, p. 723 - 729 (2007/10/02)
The selectivity of ring opening was investigated for the hydrocracking of acenaphthene under an initial hydrogen pressure of 6 MPa and in the temperature range from 390 to 450 deg C.Major products were classified into the following six components: tetrahydroacenaphthylene, hexahydroacenaphthylene, perhydroacenaphthylene, ring opening products (bicyclic compounds and monocyclic compounds), alkylation products (tricyclic compounds of C13 or larger), and dimerization products (biacenaphthene and their hydrogenated compounds).Ring opening of acenaphthene proceeded via two routes: the direct ring opening of acenaphthene and ring opening after hydrogenation to hexahydroacenaphthylene.In the former reaction only 1-ethylnaphthalene was produced, while 1,8-dimethylnaphthalene and its hydrogenated products were not observed.In the latter reaction, on the other hand, two types of ring opening of a C-C bond adjacent to the benzene ring, the opening of a saturated five-membered ring to produce 1-ethyltetralin and the opening of a saturated six-membered ring to produce 1-propylindane, were observed.
Trifluoromethanesulfonate Esters from Dibromoalkane Methatheses with Silver Triflate: Mechanistic and Synthetic Aspects
Chapman, Robert D.,Andreshak, John L.,Herrlinger, Stephen P.,Shackelford, Scott A.,Hildreth, Robert A.,Smith, Jeffrey P.
, p. 3792 - 3798 (2007/10/02)
The methathesis reaction between silver triflate and bromoalkanes potentially offers an attractive synthetic complement to the well-known alcohol condensation with triflic anhydride for organic triflate esters.Dibromoalkanes can further give difunctional triflate intermediates and could provide convenient routes to asymmetrically substituted derivatives.Certain shorter members of the α,ω-dibromoalkane homologous series display a unique reactivity and product selectivity over higher homologues and corresponding primary monobromoalkanes.Triflate products from monobromoalkanes and α,ω- dibromoalkanes greater than 1,4-dibromobutane can lead to benzene solvent alkylation or polymerization in CCl4, but the lower 1,2-through 1,4-dibromoalkanes produce desired monobromoalkyl triflate and alkanediyl ditriflate products under the same reaction conditions.These same lower α,ω-dibromoalkanes also resist product rearrangement to secondary triflate products while the higher homologous α,ω-dibromoalkanes and primary monobromoalkanes do not.The 1,2-trough 1,4-dibromoalkanes further offer selective synthesis routes to difunctional derivatives via sequential metathesis.The unique stability and selectivity of the lower α,ω-dibromoalkane homologues are apparently best explained with anchimeric assistance by a cyclic bromonium ion in the first metathesis step followed by a rare example of cyclic anchimeric stabilization by the triflate group in the second bromine displacement.Kinetic results further support this mechanism.This metathesis reaction is, however, very dependent upon the control of several reaction conditions: dibromoalkane chain length, solvent, temperature, reaction time, and type of bromine leaving group.The optimum conditions for obtained certain α,ω- alkanediyl ditriflates, ω-bromoalkyl triflates, and 1-butyl triflate are presented.
LOW TEMPERATURE REACTION OF AROMATIC HYDROCARBONS WITH ETHYLENE AND SOLVATED ELECTRONS
Russey, William, E.,Haenel, Matthias, W.
, p. 4065 - 4068 (2007/10/02)
A wide variety of aromatic hydrocarbons can be ethylated at benzylic and aromatic positions by treatment with ethylene and potassium in glyme/octaglyme at -25 deg C.