Enantiodiscrimination of Inherently Chiral Thiacalixarenes by Residual Dipolar Couplings

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388963%3A_____%2F24%3A00568178" target="_blank" >RIV/61388963:_____/24:00568178 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/24:43927780 RIV/60461373:22810/24:43927780 RIV/00216208:11310/24:10467046 RIV/00216208:11320/24:10467046

Výsledek na webu

<a href="https://doi.org/10.1021/acs.joc.2c02594" target="_blank" >https://doi.org/10.1021/acs.joc.2c02594</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.joc.2c02594" target="_blank" >10.1021/acs.joc.2c02594</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Enantiodiscrimination of Inherently Chiral Thiacalixarenes by Residual Dipolar Couplings

Popis výsledku v původním jazyce

Inherently chiral compounds, such as calixarenes, are chiral due to a nonplanar three-dimensional (3D) structure. Determining their conformation is essential to understand their properties, with nuclear magnetic resonance (NMR) spectroscopy being one applicable method. Using alignment media to measure residual dipolar couplings (RDCs) to obtain structural information is advantageous when classical NMR parameters like the nuclear Overhauser effect (NOE) or J-couplings fail. Besides providing more accurate structural information, the alignment media can induce different orientations of enantiomers. In this study, we examined the ability of polyglutamates with different side-chain moieties─poly-γ-benzyl-l-glutamate (PBLG) and poly-γ-p-biphenylmethyl-l-glutamate (PBPMLG) ─to enantiodifferentiate the inherently chiral phenoxathiin-based thiacalix[4]arenes. Both media, in combination with two solvents, allowed for enantiodiscrimination, which was, to the best of our knowledge, proved for the first time on inherently chiral compounds. Moreover, using the experimental RDCs, we investigated the calix[4]arenes conformational preferences in solution, quantitatively analyzed the differences in the alignment of the enantiomers, and discussed the pitfalls of the use of the RDC analysis.

Název v anglickém jazyce

Enantiodiscrimination of Inherently Chiral Thiacalixarenes by Residual Dipolar Couplings

Popis výsledku anglicky

Inherently chiral compounds, such as calixarenes, are chiral due to a nonplanar three-dimensional (3D) structure. Determining their conformation is essential to understand their properties, with nuclear magnetic resonance (NMR) spectroscopy being one applicable method. Using alignment media to measure residual dipolar couplings (RDCs) to obtain structural information is advantageous when classical NMR parameters like the nuclear Overhauser effect (NOE) or J-couplings fail. Besides providing more accurate structural information, the alignment media can induce different orientations of enantiomers. In this study, we examined the ability of polyglutamates with different side-chain moieties─poly-γ-benzyl-l-glutamate (PBLG) and poly-γ-p-biphenylmethyl-l-glutamate (PBPMLG) ─to enantiodifferentiate the inherently chiral phenoxathiin-based thiacalix[4]arenes. Both media, in combination with two solvents, allowed for enantiodiscrimination, which was, to the best of our knowledge, proved for the first time on inherently chiral compounds. Moreover, using the experimental RDCs, we investigated the calix[4]arenes conformational preferences in solution, quantitatively analyzed the differences in the alignment of the enantiomers, and discussed the pitfalls of the use of the RDC analysis.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10401 - Organic chemistry

Projekt

<a href="/cs/project/GA20-08667S" target="_blank" >GA20-08667S: Chemie thiacalixarenů na bázi phenoxathiinu a příbuzných látek</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Organic Chemistry

ISSN

0022-3263

e-ISSN

1520-6904

Svazek periodika

89

Číslo periodika v rámci svazku

14

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

9711-9720

Kód UT WoS článku

000920494700001

EID výsledku v databázi Scopus

2-s2.0-85146570802