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Archer G, Meyrelles R, Eder I, Kovács N, Maryasin B, Médebielle M, Merad J. Photoredox-Catalyzed α-C-H Monoalkylation of Symmetric Polyols in the Presence of CO 2. Angew Chem Int Ed Engl 2024; 63:e202315329. [PMID: 38091251 DOI: 10.1002/anie.202315329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Indexed: 12/31/2023]
Abstract
Achieving the selective modification of symmetric poly-hydroxylated compounds presents a significant challenge due to the presence of identical active sites. Herein, we address this challenge through the design of a ternary catalytic system that includes a photoredox catalyst, a hydrogen atom transfer promotor and a carbonation catalyst. This catalytic system enables the reversible carbonation of acyclic polyols under CO2 atmosphere, which modulates the reactivity of its distinct C-H bonds toward hydrogen atom transfers. An exquisite selectivity for the monoalkylation is achieved in a variety of unprotected light polyols, yielding valuable building blocks in short reaction times. Mechanistic and computational studies demonstrate that the formation of an intramolecular hydrogen bond between the transient carbonate and the free alcohol is pivotal for the kinetic and thermodynamic activation of a specific alcohol.
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Affiliation(s)
- Gaétan Archer
- ICBMS, UMR 5246, Univ Lyon, Université Lyon 1, CNRS, INSA, CPE-Lyon, ICBMS, 1 rue Victor Grignard, 69622, Villeurbanne, France
| | - Ricardo Meyrelles
- Institute of Theoretical Chemistry, University of Vienna, Währinger Straße 17, 1090, Vienna, Austria
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090, Vienna, Austria
- Vienna Doctoral School in Chemistry, University of Vienna, Währinger Straße 42, 1090, Vienna, Austria
| | - Isabel Eder
- Institute of Theoretical Chemistry, University of Vienna, Währinger Straße 17, 1090, Vienna, Austria
| | - Nóra Kovács
- Institute of Theoretical Chemistry, University of Vienna, Währinger Straße 17, 1090, Vienna, Austria
| | - Boris Maryasin
- Institute of Theoretical Chemistry, University of Vienna, Währinger Straße 17, 1090, Vienna, Austria
- Institute of Organic Chemistry, University of Vienna, Währinger Straße 38, 1090, Vienna, Austria
| | - Maurice Médebielle
- ICBMS, UMR 5246, Univ Lyon, Université Lyon 1, CNRS, INSA, CPE-Lyon, ICBMS, 1 rue Victor Grignard, 69622, Villeurbanne, France
| | - Jérémy Merad
- ICBMS, UMR 5246, Univ Lyon, Université Lyon 1, CNRS, INSA, CPE-Lyon, ICBMS, 1 rue Victor Grignard, 69622, Villeurbanne, France
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