NHC‐Stabilized Iridium Nanoparticles as Catalysts in Hydrogen Isotope Exchange Reactions of Anilines
نویسندگان
چکیده
منابع مشابه
Anion effects to deliver enhanced iridium catalysts for hydrogen isotope exchange processes.
Synthesis of a series of iridium(I) complexes of the type [(COD)Ir(IMes)(PPh3)]X (X = BF4, OTf, and BArF) has been established. Application of these species in mild hydrogen isotope exchange processes revealed more efficient catalysis and, further, a wider solvent scope when employing larger, more weakly coordinating counterions.
متن کاملHighly active iridium(I) complexes for catalytic hydrogen isotope exchange.
Practically convenient methods have been developed for the preparation of new iridium complexes, possessing bulky N-heterocyclic carbene and phosphine ligands; these routinely handled complexes are highly active catalysts within directed hydrogen isotope exchange processes.
متن کاملHydrogen Isotope Exchange Reaction
polarization causes Q1ftf partly to cance12 Qu' and so to reduce the calculated MO approximation DNQ, making it agree better with the observed value.2~ This improvement most probably much outweighs the contrary effects obtained by optimizing Z*. The effect on DNQ of using polarized AO's is quite different in the AO than in the MO approximation. Referring to an earlier paragraph on the variation...
متن کاملApplication of neutral iridium(I) N-heterocyclic carbene complexes in ortho-directed hydrogen isotope exchange.
Bench-stable complexes of the type [Ir(COD)(NHC)Cl] (NHC = N-heterocyclic carbene) have been investigated within the field of hydrogen isotope exchange. By employing a sterically encumbered NHC within such complexes and catalyst loadings of only 5 mol%, moderate to high deuterium incorporations were achieved across a range of aromatic ketones and nitrogen-based heterocycles. The simple and synt...
متن کاملPractically convenient and industrially-aligned methods for iridium-catalysed hydrogen isotope exchange processes.
The use of alternative solvents in the iridium-catalysed hydrogen isotope exchange reaction with developing phosphine/NHC Ir(I) complexes has identified reaction media which are more widely applicable and industrially acceptable than the commonly employed chlorinated solvent, dichloromethane. Deuterium incorporation into a variety of substrates has proceeded to deliver high levels of labelling ...
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ژورنال
عنوان ژورنال: Angewandte Chemie
سال: 2020
ISSN: 0044-8249,1521-3757
DOI: 10.1002/ange.201914369