109306-86-7Relevant articles and documents
Aryl-Fluoride Bond-Forming Reductive Elimination from Nickel(IV) Centers
Meucci, Elizabeth A.,Ariafard, Alireza,Canty, Allan J.,Kampf, Jeff W.,Sanford, Melanie S.
, p. 13261 - 13267 (2019)
The treatment of pyridine- and pyrazole-ligated NiII σ-aryl complexes with Selectfluor results in C(sp2)-F bond formation under mild conditions. With appropriate design of supporting ligands, diamagnetic NiIV σ-aryl fluoride intermediates can be detected spectroscopically and/or isolated during these transformations. These studies demonstrate for the first time that NiIV σ-aryl fluoride complexes participate in challenging C(sp2)-F bond-forming reductive elimination to yield aryl fluoride products.
Directed C?H Activation and Tandem Cross-Coupling Reactions Using Palladium Nanocatalysts with Controlled Oxidation
Kim, Kiseong,Jung, Younjae,Lee, Suyeon,Kim, Mijong,Shin, Dongwoo,Byun, Hyeeun,Cho, Sung June,Song, Hyunjoon,Kim, Hyunwoo
, p. 6952 - 6956 (2017)
Controlled oxidation of palladium nanoparticles provided high-valent PdIV oxo-clusters which efficiently promote directed C?H halogenation reactions. In addition, palladium nanoparticles can undergo changes in oxidation states to provide both high-valent PdIV and low-valent Pd0 species within one system, and thus a tandem reaction of C?H halogenation and cross-coupling (C?N, C?C, and C?S bond formation) was successfully established.
Chelating N-heterocyclic carbene alkoxide as a supporting ligand for PdII/IV C-H bond functionalization catalysis
Arnold, Polly L.,Sanford, Melanie S.,Pearson, Stephen M.
, p. 13912 - 13913 (2009)
(Chemical Equation Presented) A PdIV complex that represents a viable catalytic intermediate in Pd-catalyzed C-H bond halogenation reactions has been isolated and structurally characterized. It contains the first examples of both a PdIV NHC bond and a PdIV alkoxide bond and serves as a precatalyst for C-H bond halogenation. As such, this represents a new class of tunable supporting ligand systems in PdIV catalysis.
Structure–activity comparison in palladium–N–heterocyclic carbene (NHC) catalyzed arene C[sbnd]H activation- functionalization
Mondal, Moumita,Choudhury, Joyanta
, p. 451 - 457 (2017)
A simple and efficient C[sbnd]H activation catalyst was identified through a model structure-activity screening applied to a noncooperative, nonsymmetric bimetallic palladium(II)-N-heterocyclic carbene complex. Mechanistic studies based on kinetics and DOSY NMR spectroscopy provided the origin of the higher efficiency of the identified catalyst.
Chelating Bis-N-heterocyclic Carbene-Palladium(II) Complexes for Oxidative Arene C-H Functionalization
Desai, Sai Puneet,Mondal, Moumita,Choudhury, Joyanta
, p. 2731 - 2736 (2015)
Bis-N-heterocyclic carbene (NHC)-chelated palladium(II) complexes have been synthesized, characterized fully including single-crystal X-ray structural analyses, and utilized for the first time toward catalytic oxidative C-H functionalization of arenes with PhI(OAc)2 and N-bromosuccinimide. (Figure Presented).
Tris-NHC-propagated self-supported polymer-based Pd catalysts for heterogeneous C-H functionalization
Choudhury, Joyanta,Dutta, Tapas Kumar,Mandal, Tanmoy,Mohanty, Sunit
supporting information, p. 10182 - 10185 (2021/10/12)
Three-dimensionally propagated imidazolium-containing mesoporous coordination polymer and organic polymer-based platforms were successfully exploited to develop single-site heterogenized Pd-NHC catalysts for oxidative arene/heteroarene C-H functionalization reactions. The catalysts were efficient in directed arene halogenation, and nondirected arene and heteroarene arylation reactions. High catalytic activity, excellent heterogeneity and recyclability were offered by these systems making them promising candidates in the area of heterogeneous C-H functionalization, where efficient catalysts are still scarce.
Efficient Pd-Catalyzed C—H Oxidative Bromination of Arenes with Dimethyl Sulfoxide and Hydrobromic Acid?
Yuan, Yizhi,Liang, Yujie,Shi, Shihui,Liang, Yu-Feng,Jiao, Ning
supporting information, p. 1245 - 1251 (2020/07/27)
We have developed an efficient Pd-catalyzed directed C—H bromination protocol, in which dimethyl sulfoxide (DMSO) is employed as oxidant with hydrobromic acid aqueous solution (HBr(aq)) as bromide source. The DMSO/HBr(aq) system, which is novelly and efficiently utilized in transition-metal catalyzed C—H activation, illustrates its practicability by the operational simplicity, inexpensive and readily available starting materials, and high bromide-atom economy.