Catalytic Asymmetric Oxidative γ‐Coupling of α,β‐Unsaturated Aldehydes with Air as the Terminal Oxidant

A novel concept for catalytic asymmetric coupling reactions is presented. Merging organocatalysis with single‐electron oxidation by using a catalytic amount of a copper(II) salt and air as the terminal oxidant, we have developed a highly stereoselective carbon–carbon oxidative coupling reaction of α...

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Veröffentlicht in:Angewandte Chemie 2018-02, Vol.130 (6), p.1622-1626
Hauptverfasser: Næsborg, Line, Corti, Vasco, Leth, Lars Astrup, Poulsen, Pernille H., Jørgensen, Karl Anker
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container_issue 6
container_start_page 1622
container_title Angewandte Chemie
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creator Næsborg, Line
Corti, Vasco
Leth, Lars Astrup
Poulsen, Pernille H.
Jørgensen, Karl Anker
description A novel concept for catalytic asymmetric coupling reactions is presented. Merging organocatalysis with single‐electron oxidation by using a catalytic amount of a copper(II) salt and air as the terminal oxidant, we have developed a highly stereoselective carbon–carbon oxidative coupling reaction of α,β‐unsaturated aldehydes. The concept relies on the generation of a dienamine intermediate, which is oxidized to an open‐shell activated species that undergoes highly selective γ‐homo‐ and γ‐heterocoupling reactions. In the majority of examples presented, only a single stereoisomer was formed. Frische Luft: Organokatalyse und Ein‐Elektronen‐Oxidation, dazu eine katalytische Menge eines Kupfer(II)‐Salzes und Luft als terminales Oxidationsmittel, ermöglichen die stereoselektive oxidative C‐C‐Kupplung von α,β‐ungesättigten Aldehyden (siehe Schema). Das Konzept beruht auf der Erzeugung einer Dienamin‐Zwischenstufe, die zu einer aktivierten offenschaligen Spezies oxidiert wird, die hoch selektive γ‐Homo‐ und γ‐Heterokupplungen eingeht.
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source Wiley Online Library Journals Frontfile Complete
subjects Asymmetrische Katalyse
Einelektronentransfer
Organokatalyse
Oxidative Kupplungen
Synthesemethoden
title Catalytic Asymmetric Oxidative γ‐Coupling of α,β‐Unsaturated Aldehydes with Air as the Terminal Oxidant
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