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Recchimurzo A, Balzano F, Uccello Barretta G, Gherardi L, Malanga M, Aiello F. Silylated-Acetylated Cyclodextrins as Chiral Sensors for the Enantiodiscrimination of Fluorinated Anesthetics. Molecules 2023; 28:molecules28062804. [PMID: 36985776 PMCID: PMC10058779 DOI: 10.3390/molecules28062804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 03/17/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023] Open
Abstract
Silylated-acetylated cyclodextrin (CD) derivatives have recently been investigated, via nuclear magnetic resonance (NMR) spectroscopy, as chiral sensors for substrates that are endowed and devoid of fluorine atoms, and the importance of Si-F interaction in the discrimination phenomena has been assessed. Here, the contributions of both superficial interactions and inclusion processes were further evaluated by extending the records to other chiral fluorinated substrates of interest for pharmaceutical applications. Non-equivalences were measured for both the 1H and 19F resonances in equimolar mixtures with the CDs; the promising results also supported the use of chiral sensors in sub-stoichiometric amounts. Finally, the occurrence of inclusion processes was evaluated by analyzing the intermolecular dipolar interactions by means of ROESY (Rotating-frame Overhauser Enhancement Spectroscopy) experiments. The study confirmed that the γCD derivative is the best chiral solvating agent for the fluorinated substrates investigated, likely due to the higher number of silyl moieties that can be involved in Si-F interactions. The contribution of inclusion processes to the enantiodiscrimination was also confirmed by comparison with the α- and β-analogues. Overall, the CD derivatives proved to be able to discriminate fluorinated substrates even when used in sub-stoichiometric amounts.
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Affiliation(s)
- Alessandra Recchimurzo
- Department of Chemistry and Industrial Chemistry, University of Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
| | - Federica Balzano
- Department of Chemistry and Industrial Chemistry, University of Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
| | - Gloria Uccello Barretta
- Department of Chemistry and Industrial Chemistry, University of Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
| | - Luca Gherardi
- Department of Chemistry and Industrial Chemistry, University of Pisa, via G. Moruzzi 13, 56124 Pisa, Italy
| | - Milo Malanga
- CycloLab, Cyclodextrin R&D Ltd., Illatos út. 7, H-1097 Budapest, Hungary
| | - Federica Aiello
- National Research Council, Institute for Chemical and Physical Processes (CNR-IPCF), via G. Moruzzi 1, 56124 Pisa, Italy
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Chiral Discrimination Mechanisms by Silylated-Acetylated Cyclodextrins: Superficial Interactions vs. Inclusion. Int J Mol Sci 2022; 23:ijms232113169. [DOI: 10.3390/ijms232113169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 10/13/2022] [Accepted: 10/26/2022] [Indexed: 11/16/2022] Open
Abstract
Cyclodextrin derivatives constitute a powerful class of auxiliary agents for the discrimination of apolar chiral substrates. Both host–guest inclusion phenomena and interactions with the derivatizing groups located on the surface of the macrocycle could drive the enantiodiscrimination; thus, it is important to understand the role that these processes play in the rational design of new chiral selectors. The purpose of this study is to compare via nuclear magnetic resonance (NMR) spectroscopy the efficiency of silylated-acetylated α-, β-, and γ-cyclodextrins in the chiral discrimination of 1,1,1,3,3-pentafluoro-2-(fluoromethoxy)-3-methoxypropane (compound B) and methyl 2-chloropropionate (MCP). NMR DOSY (Diffusion Ordered SpectroscopY) experiments were conducted for the determination of the bound molar fractions and the association constants, whereas ROESY (Rotating-frame Overhauser Enhancement SpectroscopY) measurements provided information on the hosts’ conformation and on the interaction phenomena with the guests. Compound B, endowed with fluorinated moieties, is not deeply included due to attractive Si-F interactions occurring at the external surface of the cyclodextrins. Therefore, a low selectivity toward the size of cyclodextrin cavity is found. By contrast, enantiodiscrimination of MCP relies on the optimal fitting between the size of the guest and that of the cyclodextrin cavity.
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Dalvano BE, Wenzel TJ. Sulfated cyclodextrins as water-soluble chiral NMR solvating agents for cationic compounds. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.tetasy.2017.07.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Limitations and extensions of the lock-and-key principle: differences between gas state, solution and solid state structures. Int J Mol Sci 2015; 16:6694-717. [PMID: 25815592 PMCID: PMC4424984 DOI: 10.3390/ijms16046694] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2015] [Accepted: 03/16/2015] [Indexed: 12/30/2022] Open
Abstract
The lock-and-key concept is discussed with respect to necessary extensions. Formation of supramolecular complexes depends not only, and often not even primarily on an optimal geometric fit between host and guest. Induced fit and allosteric interactions have long been known as important modifications. Different binding mechanisms, the medium used and pH effects can exert a major influence on the affinity. Stereoelectronic effects due to lone pair orientation can lead to variation of binding constants by orders of magnitude. Hydrophobic interactions due to high-energy water inside cavities modify the mechanical lock-and-key picture. That optimal affinities are observed if the cavity is only partially filled by the ligand can be in conflict with the lock-and-key principle. In crystals other forces than those between host and guest often dominate, leading to differences between solid state and solution structures. This is exemplified in particular with calixarene complexes, which by X-ray analysis more often than other hosts show guest molecules outside their cavity. In view of this the particular problems with the identification of weak interactions in crystals is discussed.
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Uccello-Barretta G, Balzano F, Aiello F, Vanni L, Mori M, Menta S, Calcaterra A, Botta B. Hydrolytic inhibition of α-chymotrypsin by 2,8,14,20-tetrakis(D-leucyl-D-valinamido)resorc[4]arenecarboxylic acid: a spectroscopic NMR and computational combined approach. Org Biomol Chem 2015; 13:916-24. [PMID: 25406985 DOI: 10.1039/c4ob01936a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The stereochemical features of 2,8,14,20-tetrakis(D-leucyl-D-valinamido)resorc[4]arenecarboxylic acid and the N-succinyl-L-alanyl-L-alanyl-L-prolyl-L-phenylalanine-4-nitroanilide polypeptide substrate were investigated by nuclear magnetic resonance spectroscopy. Proton selective relaxation parameters gave the basis for the inhibitory activity of resorcin[4]arene in the hydrolysis of the polypeptide substrate by α-chymotrypsin. Results showed that an interaction between the resorcin[4]arene and α-chymotrypsin does occur, and involves the hydrophobic moiety of the macrocycle. This interaction is further reinforced by polar groups located on the side chains of the resorcin[4]arene, whereas the macrocycle-polypeptide substrate interaction is negligible. Conformational analysis and interaction studies carried out by molecular modeling are in good agreement with the NMR data, thus providing an additional support to the rationalization of the inhibitory potential of resorcin[4]arenes on the α-chymotrypsin activity.
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Affiliation(s)
- Gloria Uccello-Barretta
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via G. Moruzzi 3, 56124 Pisa, Italy.
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Uccello-Barretta G, Schurig V, Balzano F, Vanni L, Aiello F, Mori M, Ghirga F. Synergistic Effects of Trace Amounts of Water in the Enantiodiscrimination Processes by Lipodex E: A Spectroscopic and Computational Investigation. Chirality 2014; 27:95-103. [DOI: 10.1002/chir.22394] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 08/29/2014] [Accepted: 09/03/2014] [Indexed: 11/10/2022]
Affiliation(s)
| | - Volker Schurig
- Institute of Organic Chemistry; University of Tübingen; Tübingen Germany
| | - Federica Balzano
- Department of Chemistry and Industrial Chemistry; University of Pisa; Pisa Italy
| | - Letizia Vanni
- Department of Chemistry and Industrial Chemistry; University of Pisa; Pisa Italy
| | - Federica Aiello
- Department of Chemistry and Industrial Chemistry; University of Pisa; Pisa Italy
| | - Mattia Mori
- Center for Life Nano Science@Sapienza; Istituto Italiano di Tecnologia; Rome Italy
| | - Francesca Ghirga
- Department of Chemistry and Drug Technology; Sapienza University; Rome Italy
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Acuña-Rougier C, Olea-Azar C. Thermodynamic and geometric study of diasteroisomeric complexes formed by racemic flavanones and three cyclodextrins through NMR. J INCL PHENOM MACRO 2012. [DOI: 10.1007/s10847-012-0153-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Wenzel TJ, Chisholm CD. Using NMR spectroscopic methods to determine enantiomeric purity and assign absolute stereochemistry. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2011; 59:1-63. [PMID: 21600355 DOI: 10.1016/j.pnmrs.2010.07.003] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Accepted: 07/28/2010] [Indexed: 05/30/2023]
Affiliation(s)
- Thomas J Wenzel
- Department of Chemistry, Bates College, Lewiston, Maine 04240, USA.
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Wenzel TJ, Chisholm CD. Assignment of absolute configuration using chiral reagents and NMR spectroscopy. Chirality 2010; 23:190-214. [DOI: 10.1002/chir.20889] [Citation(s) in RCA: 133] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2010] [Accepted: 05/18/2010] [Indexed: 11/11/2022]
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Uccello-Barretta G, Vanni L, Balzano F. Nuclear magnetic resonance approaches to the rationalization of chromatographic enantiorecognition processes. J Chromatogr A 2010; 1217:928-40. [DOI: 10.1016/j.chroma.2009.10.070] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2009] [Revised: 09/30/2009] [Accepted: 10/23/2009] [Indexed: 10/20/2022]
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Rodrigues ED, da Silva DB, de Oliveira DCR, da Silva GVJ. DOSY NMR applied to analysis of flavonoid glycosides from Bidens sulphurea. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2009; 47:1095-1100. [PMID: 19768723 DOI: 10.1002/mrc.2516] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
2D DOSY 1H NMR has proved to be a useful technique in the identification of the molecular skeleton of the four major compounds of ethyl acetate extract of aerial parts of Bidens sulphurea (Asteraceae). The combination of this technique with HPLC, mass spectrometry and other NMR techniques enabled the identification of four flavonoid glycosides: quercetin-3-O-beta-D-galactopyranoside, quercetin-3-O-beta-D-glycopyranoside, quercetin-3-O-alpha-L-arabinofuranoside and quercetin-3-O-beta-D-rhamnopyranoside.
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Affiliation(s)
- Edilene Delphino Rodrigues
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Avenida dos Bandeirantes 3900, 14040-901 Ribeirão Preto, SP, Brazil.
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Uccello-Barretta G, Vanni L, Balzano F. NMR Enantiodiscrimination Phenomena by QuinineC9-Carbamates. European J Org Chem 2009. [DOI: 10.1002/ejoc.200801001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Provencher KA, Weber MA, Randall LA, Cunningham PR, Dignam CF, Wenzel TJ. Carboxymethylated cyclodextrins and their complexes with Pr(III) and Yb(III) as water-soluble chiral NMR solvating agents for cationic compounds. Chirality 2009; 22:336-46. [DOI: 10.1002/chir.20748] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Provencher KA, Wenzel TJ. Carboxymethylated cyclodextrins and their paramagnetic lanthanide complexes as water-soluble chiral NMR solvating agents. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.07.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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