Recyclable Mn (I) Catalysts for Base‐Free Asymmetric Hydrogenation: Mechanistic, DFT and Catalytic Studies

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Abstract: We report here a mechanistic, DFT and catalytic study on a series of Mn (I) complexes 1, 2 (a–d), 3, 4. The studies apprehended the requirements for Mn (I) complexes to be active in both asymmetric direct (AH) and transfer hydrogenations (ATH). The investigations disclosed 6 vital factors accelerating the formation of a resting species, which plays a significant role in lowering the activities of the Mn (I) complex 1 in ATH and AH, respectively. In addition, we also report here a base free Mn (I) catalyzed ATH of aryl alkyl ketones with high enantioselectivity (up to 98 % ee) and improved activity. More significantly, a novel and simple single‐step process for recycling the resting species from the catalytic leftover has been discovered. Notably, the studies provide evidence for the existence of two different temperature dependent mechanisms for AH and ATH, in contrast to previous studies on related systems.

Location: Deutsche Nationalbibliothek Frankfurt am Main

Extent: Online-Ressource

Language: Englisch

Bibliographic citation: Recyclable Mn (I) Catalysts for Base‐Free Asymmetric Hydrogenation: Mechanistic, DFT and Catalytic Studies ; day:04 ; month:07 ; year:2022 ; extent:1
Chemistry - a European journal ; (04.07.2022) (gesamt 1)

Creator: Jayaprakash, Harikrishnan
Coburger, Peter
Wörle, Michael
Togni, Antonio
Grützmacher, Hansjorg

DOI: 10.1002/chem.202201522

URN: urn:nbn:de:101:1-2022070415144419927976

Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.

Last update: 15.08.2025, 7:23 AM CEST

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Jayaprakash, Harikrishnan
Coburger, Peter
Wörle, Michael
Togni, Antonio
Grützmacher, Hansjorg

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Recyclable Mn (I) Catalysts for Base‐Free Asymmetric Hydrogenation: Mechanistic, DFT and Catalytic Studies

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