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Open AccessFeature PaperReview

Al(Salen) Metal Complexes in Stereoselective Catalysis

1
ALMA MATER STUDIORUM Università di Bologna, Dipartimento di Chimica “G. Ciamician”, Via Selmi 2, 40126 Bologna, Italy
2
Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
*
Authors to whom correspondence should be addressed.
Molecules 2019, 24(9), 1716; https://doi.org/10.3390/molecules24091716
Received: 15 April 2019 / Revised: 29 April 2019 / Accepted: 30 April 2019 / Published: 2 May 2019
(This article belongs to the Special Issue Schiff Base and Its Metal Complexes)

Abstract

Salen ligands are a class of Schiff bases simply obtained through condensation of two molecules of a hydroxyl-substituted aryl aldehyde with an achiral or chiral diamine. The prototype salen, or N,N′-bis(salicylidene)ethylenediamine has a long history, as it was first reported in 1889, and immediately, some of its metal complexes were also described. Now, the salen ligands are a class of N,N,O,O tetradentate Schiff bases capable of coordinating many metal ions. The geometry and the stereogenic group inserted in the diamine backbone or aryl aldehyde backbone have been utilized in the past to efficiently transmit chiral information in a variety of different reactions. In this review we will summarize the important and recent achievements obtained in stereocontrolled reactions in which Al(salen) metal complexes are employed. Several other reviews devoted to the general applications and synthesis of chromium and other metal salens have already been published. View Full-Text
Keywords: aluminum; aluminum metal complexes; salen; chiral ligand; Lewis Acid; catalysis; stereoselective reactions; bifunctional catalysis; organic synthesis aluminum; aluminum metal complexes; salen; chiral ligand; Lewis Acid; catalysis; stereoselective reactions; bifunctional catalysis; organic synthesis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Gualandi, A.; Calogero, F.; Potenti, S.; Cozzi, P.G. Al(Salen) Metal Complexes in Stereoselective Catalysis. Molecules 2019, 24, 1716.

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