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Hydrogen Isotope Exchange Catalyzed by Ru Nanocatalysts: Labelling of Complex Molecules Containing N-Heterocycles and Reaction Mechanism Insights.


ABSTRACT: Ruthenium nanocatalysis can provide effective deuteration and tritiation of oxazole, imidazole, triazole and carbazole substructures in complex molecules using D2 or T2 gas as isotopic sources. Depending on the substructure considered, this approach does not only represent a significant step forward in practice, with notably higher isotope uptakes, a broader substrate scope and a higher solvent applicability compared to existing procedures, but also the unique way to label important heterocycles using hydrogen isotope exchange. In terms of applications, the high incorporation of deuterium atoms, allows the synthesis of internal standards for LC-MS quantification. Moreover, the efficacy of the catalyst permits, even under subatmospheric pressure of T2 gas, the preparation of complex radiolabeled drugs owning high molar activities. From a fundamental point of view, a detailed DFT-based mechanistic study identifying undisclosed key intermediates, allowed a deeper understanding of C-H (and N-H) activation processes occurring at the surface of metallic nanoclusters.

SUBMITTER: Pfeifer V 

PROVIDER: S-EPMC7187376 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature

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Hydrogen Isotope Exchange Catalyzed by Ru Nanocatalysts: Labelling of Complex Molecules Containing N-Heterocycles and Reaction Mechanism Insights.

Pfeifer Viktor V   Certiat Marie M   Bouzouita Donia D   Palazzolo Alberto A   Garcia-Argote Sébastien S   Marcon Elodie E   Buisson David-Alexandre DA   Lesot Philippe P   Maron Laurent L   Chaudret Bruno B   Tricard Simon S   Del Rosal Iker I   Poteau Romuald R   Feuillastre Sophie S   Pieters Grégory G  

Chemistry (Weinheim an der Bergstrasse, Germany) 20200309 22


Ruthenium nanocatalysis can provide effective deuteration and tritiation of oxazole, imidazole, triazole and carbazole substructures in complex molecules using D<sub>2</sub> or T<sub>2</sub> gas as isotopic sources. Depending on the substructure considered, this approach does not only represent a significant step forward in practice, with notably higher isotope uptakes, a broader substrate scope and a higher solvent applicability compared to existing procedures, but also the unique way to label  ...[more]

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