67691-05-8Relevant articles and documents
Activated CO2 sorption in mesoporous imidazolium-type poly(ionic liquid)-based polyampholytes
Soll, Sebastian,Zhao, Qiang,Weber, Jens,Yuan, Jiayin
, p. 3003 - 3010 (2013)
In this contribution, we present the formation of mesoporous polyampholyte networks via self-complexation (inter-and intrapolyelectrolyte complexation) of copolymers bearing both the imidazolium cations and the carboxylic acid units. The copolymers were p
Rhodium(III)-Catalyzed Nonaromatic sp2 C-H Activation/Annulation Using NHC as a Directing and Functionalizable Group
Thenarukandiyil, Ranjeesh,Thrikkykkal, Hridya,Choudhury, Joyanta
, p. 3007 - 3013 (2016)
In parallel to the directing-group-assisted sp2 C-H bond activation-functionalization of aromatic backbones, a similar exercise with nonaromatic sp2 C-H bonds is also in high demand in synthetic chemistry despite several challenges pertinent to the latter process. In the presented protocol, N-heterocyclic carbene (NHC) motifs, appended to nonaromatic sp2 C-H bond-containing organic molecules, have been used for developing a rhodium(III)-catalyzed annulation reaction with internal alkynes to synthesize a class of imidazo[1,2-a]pyridinium architectures. Mechanistic studies highlight the directing role of the NHC ligand during the C-H activation process and intermediacy of the C-H-activated Rh-NHC metallacycle in the catalysis.
Host-Enhanced Phenyl-Perfluorophenyl Polar-πInteractions
Huang, Zehuan,Chen, Xiaoyi,Wu, Guanglu,Metrangolo, Pierangelo,Whitaker, Daniel,McCune, Jade A.,Scherman, Oren A.
supporting information, p. 7356 - 7361 (2020/04/22)
Phenyl-perfluorophenyl polar-πinteractions have been revisited for the design and fabrication of functional supramolecular systems. The relatively weak associative interactions (ΔG ≈ -1.0 kcal/mol) have limited their use in aqueous self-assembly to date.
Heavy metal removing by modified bentonite and study of catalytic activity
Kakaei, Saeed,Khameneh, Elham Sattarzadeh,Rezazadeh, Fardin,Hosseini, Majid Haji
, (2019/09/09)
Due to the high hydrophobicity and surface area, clays are efficient adsorbents for the removal of liquid impurities and purification of gases when they are modified. In this work, bentonite was modified with imidazole and imidazolium groups and resulting clays were characterized by different techniques such as 1H NMR, 13C NMR, TEM, SEM, XPS, TG, and FT-IR. Applications of these clays were studied in the removal of Co, Cu, and Pb in the wastewater. Effects of contact time, pH, initial heavy metal ions concentration, and kinetic were investigated. The catalytic activity of the metals adsorbed by imidazole modified bentonite was studied in A3 coupling reactions of various amines, aldehydes, and alkynes.
Asymmetric rhodium-directed anti-markovnikov regioselective boracyclopentannulation
Toure, Momar,Chuzel, Olivier,Parrain, Jean-Luc
supporting information, p. 17892 - 17895 (2013/01/15)
A Shimoi-type activation of B-H bond of NHC-boranes by a diphosphane-ligated cationic Rh complex was applied in an unprecedented intramolecular hydroboration reaction of simple olefins. The use of NHC-boranes as hydroborating reagents is still undisclosed due to their nonreactivity toward alkenes which could be explained by the high stability of this complex rendering it unable to provide a "free" borane hydroborating reagent. B-H bond Rh activation of NHC-borane circumvents this limitation, and asymmetric Rh-directed anti-Markovnikov boracyclopentannulation reaction led to a library of enantioenriched cyclic boranes in high yield (up to 94%) with high regio- (up to 100%) and enantioselectivity (er up to 99.2:0.8). This new activation mode of NHC-boranes highlights their use in organometallic chemistry and offers a very good approach to access chiral cyclic NHC-boranes.
