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CNR ExploRA
Article . 2022
Data sources: CNR ExploRA
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Chirality
Article . 2022 . Peer-reviewed
License: Wiley Online Library User Agreement
Data sources: Crossref
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Chirality
Article . 2022
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Comparative enantioseparation of planar chiral ferrocenes on polysaccharide‐based chiral stationary phases

Authors: Alessandro Dessì; Barbara Sechi; Roberto Dallocchio; Bezhan Chankvetadze; Mireia PérezBaeza; Sergio Cossu; Victor Mamane; +2 Authors

Comparative enantioseparation of planar chiral ferrocenes on polysaccharide‐based chiral stationary phases

Abstract

AbstractPlanar chiral ferrocenes are well‐known compounds that have attracted interest for application in synthesis, catalysis, material science, and medicinal chemistry for several decades. In spite of the fact that asymmetric synthesis procedures for obtaining enantiomerically enriched ferrocenes are available, sometimes, the accessible enantiomeric excess of the chiral products is unsatisfactory. In such cases and for resolution of racemic planar chiral ferrocenes, enantioselective high‐performance liquid chromatography (HPLC) on polysaccharide‐based chiral stationary phases (CSPs) has been used in quite a few literature articles. However, although moderate/high enantioselectivities have been obtained for planar chiral ferrocenes bearing polar substituents, the enantioseparation of derivatives containing halogens, or exclusively alkyl groups, remains rather challenging. In this study, the enantioseparation of ten planar chiral 1,2‐ and 1,3‐disubstituted ferrocenes was explored by using five polysaccharide‐based CSPs under multimodal elution conditions. Baseline enantioseparations were achieved for nine analytes with separation factors (α) ranging from 1.20 to 2.92. The presence of π‐extended systems in the analyte structure was shown to impact affinity of the most retained enantiomer toward amylose‐based selectors, observing retention times higher than 80 min with methanol‐containing mobile phases (MPs). Electrostatic potential (V) analysis and molecular dynamics (MD) simulations were used in order to study interaction modes at the molecular level.

Countries
Spain, Italy
Keywords

Planar chirality, Metallocenes, Electrostatic potential, electrostatic potential; enantioseparation; ferrocenes; planar chirality; polysaccharide-based chiral stationary phases, Stereoisomerism, Química analítica, Polysaccharide-based chiral stationary phases, Enantioseparation, Polysaccharides, Ferrocenes, Amylose, Chromatography, High Pressure Liquid

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
13
Top 10%
Average
Top 10%
Green