Ruthenacycles and Iridacycles as Transfer Hydrogenation Catalysts

In this review, we describe the synthesis and use in hydrogen transfer reactions of ruthenacycles and iridacycles. The review limits itself to metallacycles where a ligand is bound in bidentate fashion to either ruthenium or iridium via a carbon–metal sigma bond, as well as a dative bond from a hete...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Vol. 26; no. 13; p. 4076
Main Authors: Ritleng, Vincent, de Vries, Johannes G.
Format: Journal Article
Language:English
Published: Basel MDPI AG 01.07.2021
MDPI
Subjects:
Chemical Sciences
Hydrogenation
iridium
ketone
Ligands
metallacycle
oxidation
Review
ruthenium
transfer hydrogenation
ketone
iridium
oxidation
ruthenium
transfer hydrogenation
metallacycle
ISSN:1420-3049, 1420-3049
Online Access:Get full text
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Summary:In this review, we describe the synthesis and use in hydrogen transfer reactions of ruthenacycles and iridacycles. The review limits itself to metallacycles where a ligand is bound in bidentate fashion to either ruthenium or iridium via a carbon–metal sigma bond, as well as a dative bond from a heteroatom or an N-heterocyclic carbene. Pincer complexes fall outside the scope. Described are applications in (asymmetric) transfer hydrogenation of aldehydes, ketones, and imines, as well as reductive aminations. Oxidation reactions, i.e., classical Oppenauer oxidation, which is the reverse of transfer hydrogenation, as well as dehydrogenations and oxidations with oxygen, are described. Racemizations of alcohols and secondary amines are also catalyzed by ruthenacycles and iridacycles.
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ISSN:1420-3049
1420-3049
DOI:10.3390/molecules26134076