Catalytic synthesis of phenols with nitrous oxide

Franck Vaillant, Ana Mateos Calbet, Silvia González-Pelayo, Edward J. Reijerse, Shengyang Ni, Julia Busch and Josep Cornella ()
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Franck Vaillant: Max-Planck-Institut für Kohlenforschung
Ana Mateos Calbet: Max-Planck-Institut für Kohlenforschung
Silvia González-Pelayo: Max-Planck-Institut für Kohlenforschung
Edward J. Reijerse: Max-Planck-Institut für Chemische Energiekonversion
Shengyang Ni: Max-Planck-Institut für Kohlenforschung
Julia Busch: Max-Planck-Institut für Kohlenforschung
Josep Cornella: Max-Planck-Institut für Kohlenforschung

Nature, 2022, vol. 604, issue 7907, 677-683

Abstract: Abstract The development of catalytic chemical processes that enable the revalorization of nitrous oxide (N2O) is an attractive strategy to alleviate the environmental threat posed by its emissions1–6. Traditionally, N2O has been considered an inert molecule, intractable for organic chemists as an oxidant or O-atom transfer reagent, owing to the harsh conditions required for its activation (>150 °C, 50‒200 bar)7–11. Here we report an insertion of N2O into a Ni‒C bond under mild conditions (room temperature, 1.5–2 bar N2O), thus delivering valuable phenols and releasing benign N2. This fundamentally distinct organometallic C‒O bond-forming step differs from the current strategies based on reductive elimination and enables an alternative catalytic approach for the conversion of aryl halides to phenols. The process was rendered catalytic by means of a bipyridine-based ligands for the Ni centre. The method is robust, mild and highly selective, able to accommodate base-sensitive functionalities as well as permitting phenol synthesis from densely functionalized aryl halides. Although this protocol does not provide a solution to the mitigation of N2O emissions, it represents a reactivity blueprint for the mild revalorization of abundant N2O as an O source.

Date: 2022
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DOI: 10.1038/s41586-022-04516-4

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