2797-28-6Relevant articles and documents
N-Heterocyclic Iod(az)olium Salts – Potent Halogen-Bond Donors in Organocatalysis
Boelke, Andreas,Kuczmera, Thomas J.,Lork, Enno,Nachtsheim, Boris J.
supporting information, p. 13128 - 13134 (2021/08/09)
This article describes the application of N-heterocyclic iod(az)olium salts (NHISs) as highly reactive organocatalysts. A variety of mono- and dicationic NHISs are described and utilized as potent XB-donors in halogen-bond catalysis. They were benchmarked in seven diverse test reactions in which the activation of carbon- and metal-chloride bonds as well as carbonyl and nitro groups was achieved. N-methylated dicationic NHISs rendered the highest reactivity in all investigated catalytic applications with reactivities even higher than all previously described monodentate XB-donors based on iodine(I) and (III) and the strong Lewis acid BF3.
Alkane-soluble tetra(pentafluorophenyl)borate as well as preparation method and application thereof
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Paragraph 0131-0134, (2021/10/27)
The invention discloses alkane-soluble tetra(pentafluorophenyl)borate, the structural formula of which is as shown in formula I; in the formula I, R represents 1-hexyl (C6H13), 1-octyl (C8H17), 1-decyl (C10H21) or dodecyl (C12H25), and the substitution position on a benzene ring is ortho-position, meta-position or para-position. The invention also provides a preparation method of the alkane-soluble tetra(pentafluorophenyl)borate and application of the alkane-soluble tetra(pentafluorophenyl)borate in olefin polymerization reaction. The alkane-soluble tetra(pentafluorophenyl)borate provided by the invention not only can be dissolved in a conventional toluene dichloromethane solvent, but also can be dissolved in non-polar straight-chain alkane and cycloalkane solvents. Meanwhile, the compound can serve as a cocatalyst to catalyze olefin polymerization, so that a main catalyst can be efficiently activated to form a high-activity catalyst, ethylene can be catalyzed to polymerize in a non-polar solvent, and a high-performance polyolefin material is prepared.
Vinyl Carbocations Generated under Basic Conditions and Their Intramolecular C-H Insertion Reactions
Wigman, Benjamin,Popov, Stasik,Bagdasarian, Alex L.,Shao, Brian,Benton, Tyler R.,Williams, Chloé G.,Fisher, Steven P.,Lavallo, Vincent,Houk,Nelson, Hosea M.
supporting information, p. 9140 - 9144 (2019/06/08)
Here we report the surprising discovery that high-energy vinyl carbocations can be generated under strongly basic conditions, and that they engage in intramolecular sp3 C-H insertion reactions through the catalysis of weakly coordinating anion salts. This approach relies on the unconventional combination of lithium hexamethyldisilazide base and the commercially available catalyst, triphenylmethylium tetrakis(pentafluorophenyl)borate. These reagents form a catalytically active lithium species that enables the application of vinyl cation C-H insertion reactions to heteroatom-containing substrates.