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Pérez EMS, Matamoros E, Cintas P, Palacios JC. Exploring and Re-Assessing Reverse Anomeric Effect in 2-Iminoaldoses Derived from Mono- and Polynuclear Aromatic Aldehydes. Molecules 2024; 29:4131. [PMID: 39274978 DOI: 10.3390/molecules29174131] [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: 08/05/2024] [Revised: 08/24/2024] [Accepted: 08/26/2024] [Indexed: 09/16/2024] Open
Abstract
A curious and noticeable structural feature in Schiff bases from 2-aminoaldoses is the fact that imino tautomers arranged equatorially in the most stable ring conformation exhibit a counterintuitive reverse anomeric effect (RAE) in the mutarotational equilibrium, i.e., the most stable and abundant anomer is the equatorial one (β). As shown by our very recent research, this effect arises from the total or partial inhibition of the exo-anomeric effect due to the presence of an intramolecular hydrogen bond between the anomeric hydroxyl and the iminic nitrogen in the axial anomer (α). When the Schiff base adopts either an enamine structure or the imino group is protonated, the exo-anomeric effect is restored, and the axial α-anomer becomes the most stable species. Although the intramolecular H-bonding should appropriately be interpreted as a genuine stereoelectronic effect, the magnitude of the RAE could be affected by other structural parameters. Herein and through a comprehensive analysis of benzylidene, cinnamylidene, naphthalene, phenanthrene, and anthracene aldehydes, we show the robustness of the RAE effect, which is similar in extent to simple aldehydes screened so far, irrespective of the size and/or hydrophobicity of the substituent at the nitrogen atom.
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Affiliation(s)
- Esther M S Pérez
- Department of Organic and Inorganic Chemistry, Faculty of Sciences, and IACYS-Green Chemistry and Sustainable Development Unit, University of Extremadura, 06006 Badajoz, Spain
| | - Esther Matamoros
- Department of Organic and Inorganic Chemistry, Faculty of Sciences, and IACYS-Green Chemistry and Sustainable Development Unit, University of Extremadura, 06006 Badajoz, Spain
- Departamento de Química Orgánica, Universidad de Málaga, 29071 Málaga, Spain
- Instituto de Investigación Biomédica de Málaga y Plataforma en Nanomedicina-IBIMA, Plataforma Bionand, Parque Tecnológico de Andalucía, 29590 Málaga, Spain
| | - Pedro Cintas
- Department of Organic and Inorganic Chemistry, Faculty of Sciences, and IACYS-Green Chemistry and Sustainable Development Unit, University of Extremadura, 06006 Badajoz, Spain
| | - Juan C Palacios
- Department of Organic and Inorganic Chemistry, Faculty of Sciences, and IACYS-Green Chemistry and Sustainable Development Unit, University of Extremadura, 06006 Badajoz, Spain
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2
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Matamoros E, Pérez EMS, Light ME, Cintas P, Martínez RF, Palacios JC. A True Reverse Anomeric Effect Does Exist After All: A Hydrogen Bonding Stereocontrolling Effect in 2-Iminoaldoses. J Org Chem 2024; 89:7877-7898. [PMID: 38752850 PMCID: PMC11165589 DOI: 10.1021/acs.joc.4c00562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 04/18/2024] [Accepted: 04/29/2024] [Indexed: 06/13/2024]
Abstract
The reverse anomeric effect is usually associated with the equatorial preference of nitrogen substituents at the anomeric center. Once postulated as another anomeric effect with explanations ranging from electrostatic interactions to delocalization effects, it is now firmly considered to be essentially steric in nature. Through an extensive research on aryl imines from 2-amino-2-deoxyaldoses, spanning nearly two decades, we realized that such substances often show an anomalous anomeric behavior that cannot easily be rationalized on the basis of purely steric grounds. The apparent preference, or stabilization, of the β-anomer takes place to an extent that not only neutralizes but also overcomes the normal anomeric effect. Calculations indicate that there is no stereoelectronic effect opposing the anomeric effect, resulting from the repulsion between electron lone pairs on the imine nitrogen and the endocyclic oxygen. Such data and compelling structural evidence unravel why the exoanomeric effect is largely inhibited. We are now confident, as witnessed by 2-iminoaldoses, that elimination of the exo-anomeric effect in the α-anomer is due to the formation of an intramolecular hydrogen bond between the anomeric hydroxyl and the iminic nitrogen, thereby accounting for a true electronic effect. In addition, discrete solvation may help justify the observed preference for the β-anomer.
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Affiliation(s)
- Esther Matamoros
- Departamento
de Química Orgánica e Inorgánica, Facultad de
Ciencias, and Instituto del Agua, Cambio Climático y Sostenibilidad
(IACYS), Universidad de Extremadura, 06006 Badajoz, Spain
- Departamento
de Química Orgánica, Universidad
de Málaga, Campus
Teatinos s/n, 29071 Málaga, Spain
- Instituto
de Investigación Biomédica de Málaga y Plataforma
en Nanomedicina − IBIMA, Plataforma Bionand, Parque Tecnológico de Andalucía, 29590 Málaga, Spain
| | - Esther M. S. Pérez
- Departamento
de Química Orgánica e Inorgánica, Facultad de
Ciencias, and Instituto del Agua, Cambio Climático y Sostenibilidad
(IACYS), Universidad de Extremadura, 06006 Badajoz, Spain
| | - Mark E. Light
- Department
of Chemistry, Faculty of Natural and Environmental Sciences, University of Southampton, Southampton SO17 1BJ, U.K.
| | - Pedro Cintas
- Departamento
de Química Orgánica e Inorgánica, Facultad de
Ciencias, and Instituto del Agua, Cambio Climático y Sostenibilidad
(IACYS), Universidad de Extremadura, 06006 Badajoz, Spain
| | - R. Fernando Martínez
- Departamento
de Química Orgánica e Inorgánica, Facultad de
Ciencias, and Instituto del Agua, Cambio Climático y Sostenibilidad
(IACYS), Universidad de Extremadura, 06006 Badajoz, Spain
| | - Juan C. Palacios
- Departamento
de Química Orgánica e Inorgánica, Facultad de
Ciencias, and Instituto del Agua, Cambio Climático y Sostenibilidad
(IACYS), Universidad de Extremadura, 06006 Badajoz, Spain
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3
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Chen L, Feng Q, Wang C, Yin S, Mo Y. Classical Electrostatics Remains the Driving Force for Interanion Hydrogen and Halogen Bonding. J Phys Chem A 2021; 125:10428-10438. [PMID: 34818021 DOI: 10.1021/acs.jpca.1c09250] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Interanion hydrogen bonding (IAHB) and halogen bonding (IAXB) have emerged as a counterintuitive linker in a range of fascinating applications. Despite the overall repulsive (positive) binding energy, anions are trapped in a local minimum with its corresponding transition state (TS) preventing dissociation. In other words, the adduct of anions is metastable. Seemingly, the electrostatic paradigm and force field description of hydrogen/halogen bonding (HB/XB) are challenged, because of the preconceived Coulombic repulsion. Aiming at an insightful understanding of these interanion phenomena, we employed the energy decomposition approach based on the block-localized wavefunction method (BLW-ED) to investigate a series of exemplary interanion complexes. As expected, the key distinction from the conventional HB/XB lies in the electrostatic interaction, which is not increasingly repulsive as anions gradually approach to each other. Rather, there is a Coulombic barrier at a certain point. After this point, the electrostatic repulsion diminishes with the decreasing distance between anions. Differently, other energy components vary monotonically just like in conventional cases. The nonmonotonic characteristic of the electrostatic interaction in interanion complexes was reproduced using the multipole expansion in AMOEBA polarizable force field in which the state-specified atomic multipoles were adopted. This suggests that the nonmonotonicity can be well interpreted by classical electrostatic theory and there is no conceptual difference between conventional HB/XB and IAHB/IAXB. The stability of IAHB/IAXB depends on the competition between the local attractive HB/XB and the global Coulombic repulsion of net charges, though there is cooperativity between these two contrasting forces. This concise model was supported by the attractive IAHB/IAXB in modified molecular capsules, which exhibit strong quadruple HB/XBs and a considerable distance between charged substituents.
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Affiliation(s)
- Li Chen
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Qiuyan Feng
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Changwei Wang
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Shiwei Yin
- Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Yirong Mo
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro, Greensboro, North Carolina 27401, United States
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Alabugin IV, Kuhn L, Krivoshchapov NV, Mehaffy P, Medvedev MG. Anomeric effect, hyperconjugation and electrostatics: lessons from complexity in a classic stereoelectronic phenomenon. Chem Soc Rev 2021; 50:10212-10252. [PMID: 34542133 DOI: 10.1039/d1cs00564b] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Understanding the interplay of multiple components (steric, electrostatic, stereoelectronic, dispersive, etc.) that define the overall energy, structure, and reactivity of organic molecules can be a daunting task. The task becomes even more difficult when multiple approaches based on different physical premises disagree in their analysis of a multicomponent molecular system. Herein, we will use a classic conformational "oddity", the anomeric effect, to discuss the value of identifying the key contributors to reactivity that can guide chemical predictions. After providing the background related to the relevant types of hyperconjugation and a brief historic outline of the origins of the anomeric effect, we outline variations of its patterns and provide illustrative examples for the role of the anomeric effect in structure, stability, and spectroscopic properties. We show that the complete hyperconjugative model remains superior in explaining the interplay between structure and reactivity. We will use recent controversies regarding the origin of the anomeric effect to start a deeper discussion relevant to any electronic effect. Why are such questions inherently controversial? How to describe a complex quantum system using a model that is "as simple as possible, but no simpler"? What is a fair test for such a model? Perhaps, instead of asking "who is right and who is wrong?" one should ask "why do we disagree?". Stereoelectronic thinking can reconcile quantum complexity with chemical intuition and build the conceptual bridge between structure and reactivity. Even when many factors contribute to the observed structural and conformational trends, electron delocalization is a dominating force when the electronic demand is high (i.e., bonds are breaking as molecules distort from their equilibrium geometries). In these situations, the role of orbital interactions increases to the extent where they can define reactivity. For example, negative hyperconjugation can unleash the "underutilized" stereoelectronic power of unshared electrons (i.e., the lone pairs) to stabilize a developing positive charge at an anomeric carbon. This analysis paves the way for the broader discussion of the omnipresent importance of negative hyperconjugation in oxygen-containing functional groups. From that point of view, the stereoelectronic component of the anomeric effect plays a unique role in guiding reaction design.
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Affiliation(s)
- Igor V Alabugin
- Department of Chemistry and Biochemistry, Florida State University, USA.
| | - Leah Kuhn
- Department of Chemistry and Biochemistry, Florida State University, USA.
| | - Nikolai V Krivoshchapov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation. .,Lomonosov Moscow State University, Leninskie Gory 1 (3), Moscow, 119991, Russian Federation
| | - Patricia Mehaffy
- Department of Chemistry and Biochemistry, Florida State University, USA.
| | - Michael G Medvedev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation. .,A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova St., 119991 Moscow, Russian Federation
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5
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Hevey R. The Role of Fluorine in Glycomimetic Drug Design. Chemistry 2020; 27:2240-2253. [DOI: 10.1002/chem.202003135] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Rachel Hevey
- Department of Pharmaceutical Sciences University of Basel, Pharmazentrum Klingelbergstrasse 50 4056 Basel Switzerland
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6
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Gloaguen E, Mons M, Schwing K, Gerhards M. Neutral Peptides in the Gas Phase: Conformation and Aggregation Issues. Chem Rev 2020; 120:12490-12562. [PMID: 33152238 DOI: 10.1021/acs.chemrev.0c00168] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Combined IR and UV laser spectroscopic techniques in molecular beams merged with theoretical approaches have proven to be an ideal tool to elucidate intrinsic structural properties on a molecular level. It offers the possibility to analyze structural changes, in a controlled molecular environment, when successively adding aggregation partners. By this, it further makes these techniques a valuable starting point for a bottom-up approach in understanding the forces shaping larger molecular systems. This bottom-up approach was successfully applied to neutral amino acids starting around the 1990s. Ever since, experimental and theoretical methods developed further, and investigations could be extended to larger peptide systems. Against this background, the review gives an introduction to secondary structures and experimental methods as well as a summary on theoretical approaches. Vibrational frequencies being characteristic probes of molecular structure and interactions are especially addressed. Archetypal biologically relevant secondary structures investigated by molecular beam spectroscopy are described, and the influences of specific peptide residues on conformational preferences as well as the competition between secondary structures are discussed. Important influences like microsolvation or aggregation behavior are presented. Beyond the linear α-peptides, the main results of structural analysis on cyclic systems as well as on β- and γ-peptides are summarized. Overall, this contribution addresses current aspects of molecular beam spectroscopy on peptides and related species and provides molecular level insights into manifold issues of chemical and biochemical relevance.
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Affiliation(s)
- Eric Gloaguen
- CEA, CNRS, Université Paris-Saclay, CEA Paris-Saclay, Bât 522, 91191 Gif-sur-Yvette, France
| | - Michel Mons
- CEA, CNRS, Université Paris-Saclay, CEA Paris-Saclay, Bât 522, 91191 Gif-sur-Yvette, France
| | - Kirsten Schwing
- TU Kaiserslautern & Research Center Optimas, Erwin-Schrödinger-Straße 52, D-67663 Kaiserslautern, Germany
| | - Markus Gerhards
- TU Kaiserslautern & Research Center Optimas, Erwin-Schrödinger-Straße 52, D-67663 Kaiserslautern, Germany
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7
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Lin X, Wu W, Mo Y. A theoretical perspective of the agostic effect in early transition metal compounds. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213401] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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8
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Anomeric effect in pyranose-ring derivatives containing carbon, silicon, and germanium as anomeric centers: an ab initio systematic study. Struct Chem 2019. [DOI: 10.1007/s11224-019-01336-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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9
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Valdez-García RM, Alarcón-Manjarrez C, Galano A, Rodríguez-Molina B, Flores-Álamo M, Iglesias-Arteaga MA. Synthesis of Dimeric Steroid Trioxabispiroacetals Scaffolds by Gold(I)-Catalyzed Hydroalkoxylation-Hydration of Diynediols. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900860] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ricardo M. Valdez-García
- Facultad de Química; Universidad Nacional Autónoma de México, Ciudad Universitaria; 04510 Ciudad de México México
| | - Carlos Alarcón-Manjarrez
- Facultad de Química; Universidad Nacional Autónoma de México, Ciudad Universitaria; 04510 Ciudad de México México
| | - Annia Galano
- Departamento de Química; División de Ciencias Básicas e Ingeniería; Universidad Autónoma Metropolitana-Iztapalapa; Av. San Rafael Atlixco No.186, C.P. 09340, Ciudad de México México
| | - Braulio Rodríguez-Molina
- Instituto de Química; División de Ciencias Básicas e Ingeniería; Universidad Nacional Autónoma de México; 04510 Ciudad de México México
| | - Marcos Flores-Álamo
- Facultad de Química; Universidad Nacional Autónoma de México, Ciudad Universitaria; 04510 Ciudad de México México
| | - Martín A. Iglesias-Arteaga
- Facultad de Química; Universidad Nacional Autónoma de México, Ciudad Universitaria; 04510 Ciudad de México México
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10
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Gubica T, Zimniak A, Szeleszczuk Ł, Dąbrowska K, Cyrański MK, Kańska M. Influence of acetylation on anomeric effect in methyl glycosides. Mol Phys 2019. [DOI: 10.1080/00268976.2018.1512723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Tomasz Gubica
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Warsaw, Warsaw, Poland
| | - Andrzej Zimniak
- Department of Drug Technology and Pharmaceutical Biotechnology, Faculty of Pharmacy, Medical University of Warsaw, Warsaw, Poland
| | - Łukasz Szeleszczuk
- Department of Physical Chemistry, Faculty of Pharmacy, Medical University of Warsaw, Warsaw, Poland
| | | | | | - Marianna Kańska
- Department of Biochemistry, Second Faculty of Medicine with the English Division and the Physiotherapy Division, Medical University of Warsaw, Warsaw, Poland
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11
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Juaristi E, Notario R. Density Functional Theory Computational Reexamination of the Anomeric Effect in 2-Methoxy- and 2-Cyano-1,3-dioxanes and 1,3-Dithianes. Stereoelectronic Interactions Involving the Cyano (C≡N:) Group Revealed by Natural Bond Orbital (NBO) Analysis. J Org Chem 2018; 83:10326-10333. [DOI: 10.1021/acs.joc.8b01458] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eusebio Juaristi
- Departamento de Química, Centro de Investigación y de Estudios Avanzados, Avenida IPN #2508, 07300 Ciudad de México, Mexico
- El Colegio Nacional, Donceles #104, Centro Histórico, 06020 Ciudad de México, Mexico
| | - Rafael Notario
- Instituto de Química Física Rocasolano, CSIC, Serrano 119, 28006 Madrid, Spain
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12
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Wang C, Fu Y, Zhang L, Danovich D, Shaik S, Mo Y. Hydrogen- and Halogen-Bonds between Ions of like Charges: Are They Anti-Electrostatic in Nature? J Comput Chem 2017; 39:481-487. [DOI: 10.1002/jcc.25068] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Revised: 08/28/2017] [Accepted: 09/05/2017] [Indexed: 01/16/2023]
Affiliation(s)
- Changwei Wang
- Department of Chemistry, College of Science; China University of Petroleum (East China), Changjiangxi Road 66; 266580 Tsingtao China
| | - Yuzhuang Fu
- Department of Chemistry, College of Science; China University of Petroleum (East China), Changjiangxi Road 66; 266580 Tsingtao China
| | - Lina Zhang
- Department of Chemistry, College of Science; China University of Petroleum (East China), Changjiangxi Road 66; 266580 Tsingtao China
| | - David Danovich
- Institute of Chemistry; The Hebrew University; Jerusalem 91904 Israel
| | - Sason Shaik
- Institute of Chemistry; The Hebrew University; Jerusalem 91904 Israel
| | - Yirong Mo
- Department of Chemistry; Western Michigan University; Kalamazoo Michigan 49008
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13
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Alonso ER, Peña I, Cabezas C, Alonso JL. Structural Expression of Exo-Anomeric Effect. J Phys Chem Lett 2016; 7:845-850. [PMID: 26889578 DOI: 10.1021/acs.jpclett.6b00028] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Structural signatures for exo-anomeric effect have been extracted from the archetypal methyl-β-D-xyloside using broadband Fourier transform microwave spectroscopy combined with laser ablation. Spectrum analysis allows the determination of a set of rotational constants, which has been unequivocally attributed to conformer cc-β-(4)C1 g-, corresponding to the global minimum of the potential energy surface, where the aglycon residue (CH3) orientation contributes to maximization of the exo-anomeric effect. Further analysis allowed the determination of the rs structure, based on the detection of 11 isotopologues--derived from the presence of six (13)C and five (18)O atoms--observed in their natural abundances. The observed glycosidic C1-O1 bond length decrease (1.38 Å) can be interpreted in terms of the exo-anomeric effect. As such, the exo-anomeric effect presents itself as one of the main driving forces controlling the shape of many biologically important oligosaccharides.
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Affiliation(s)
- Elena R Alonso
- Grupo de Espectroscopía Molecular (GEM), Edificio Quifima, Laboratorios de Espectroscopia y Bioespectroscopia, Unidad Asociada CSIC, Parque Científico UVa, Universidad de Valladolid , 47011 Valladolid, Spain
| | - Isabel Peña
- Grupo de Espectroscopía Molecular (GEM), Edificio Quifima, Laboratorios de Espectroscopia y Bioespectroscopia, Unidad Asociada CSIC, Parque Científico UVa, Universidad de Valladolid , 47011 Valladolid, Spain
| | - Carlos Cabezas
- Grupo de Espectroscopía Molecular (GEM), Edificio Quifima, Laboratorios de Espectroscopia y Bioespectroscopia, Unidad Asociada CSIC, Parque Científico UVa, Universidad de Valladolid , 47011 Valladolid, Spain
| | - José L Alonso
- Grupo de Espectroscopía Molecular (GEM), Edificio Quifima, Laboratorios de Espectroscopia y Bioespectroscopia, Unidad Asociada CSIC, Parque Científico UVa, Universidad de Valladolid , 47011 Valladolid, Spain
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14
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Ortega PGR, Montejo M, López González JJ. Hyperconjugative and Electrostatic Interactions as Anomeric Triggers in Archetypical 1,4-Dioxane Derivatives. Chemphyschem 2015; 17:530-40. [DOI: 10.1002/cphc.201500989] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Indexed: 11/10/2022]
Affiliation(s)
| | - Manuel Montejo
- Department of Physical and Analytical Chemistry; University of Jaén; 23071 Jaén Spain
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15
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Filloux CM. Das Problem der Ursachen und die Ursachen des Problems: Der Einfluss von Sprache auf Studien des anomeren Effekts. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411185] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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Filloux CM. The Problem of Origins and Origins of the Problem: Influence of Language on Studies Concerning the Anomeric Effect. Angew Chem Int Ed Engl 2015; 54:8880-94. [PMID: 26119827 DOI: 10.1002/anie.201411185] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Revised: 01/29/2015] [Indexed: 11/08/2022]
Abstract
Cause and effect: In science, language is often subordinated to empirical data, but words can influence our ability to understand and communicate science. This Essay argues that imprecise language has confounded studies that probe the interactions underlying the anomeric effect and related phenomena.
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Affiliation(s)
- Claire M Filloux
- Chemistry, Colorado State University, 1872 Campus Delivery, Fort Collins, CO 80523 (USA).
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17
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Juaristi E, Notario R. Theoretical Examination of the S–C–P Anomeric Effect. J Org Chem 2015; 80:2879-83. [DOI: 10.1021/jo5029425] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Eusebio Juaristi
- Departamento
de Química, Centro de Investigación y de Estudios Avanzados, Instituto Politécnico Nacional, Apartado Postal 14-740, 07000 Mexico, D. F., México
| | - Rafael Notario
- Instituto de Química Física Rocasolano, CSIC, Serrano 119, 28006 Madrid, Spain
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18
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Lo R, Ganguly B. Revealing halogen bonding interactions with anomeric systems: An ab initio quantum chemical studies. J Mol Graph Model 2015; 55:123-33. [DOI: 10.1016/j.jmgm.2014.11.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 11/13/2014] [Accepted: 11/14/2014] [Indexed: 11/16/2022]
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19
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Xu B, Unione L, Sardinha J, Wu S, Ethève-Quelquejeu M, Pilar Rauter A, Blériot Y, Zhang Y, Martín-Santamaría S, Díaz D, Jiménez-Barbero J, Sollogoub M. gem-Difluorocarbadisaccharides: Restoring theexo-Anomeric Effect. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Xu B, Unione L, Sardinha J, Wu S, Ethève-Quelquejeu M, Pilar Rauter A, Blériot Y, Zhang Y, Martín-Santamaría S, Díaz D, Jiménez-Barbero J, Sollogoub M. gem-Difluorocarbadisaccharides: Restoring theexo-Anomeric Effect. Angew Chem Int Ed Engl 2014; 53:9597-602. [DOI: 10.1002/anie.201405008] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 06/06/2014] [Indexed: 11/06/2022]
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Wang C, Ying F, Wu W, Mo Y. How solvent influences the anomeric effect: roles of hyperconjugative versus steric interactions on the conformational preference. J Org Chem 2014; 79:1571-81. [PMID: 24456135 DOI: 10.1021/jo402306e] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The block-localized wave function (BLW) method, which can derive optimal electron-localized state with intramolecular electron delocalization completely deactivated, has been combined with the polarizable continuum model (PCM) to probe the variation of the anomeric effect in solution. Currently both the hyperconjugation and electrostatic models have been called to interpret the anomeric effect in carbohydrate molecules. Here we employed the BLW-PCM scheme to analyze the energy differences between α and β anomers of substituted tetrahydropyran C5OH9Y (Y = F, Cl, OH, NH2, and CH3) and tetrahydrothiopyran C5SH9Y (Y = F, Cl, OH, and CH3) in solvents including chloroform, acetone, and water. In accord with literature, our computations show that for anomeric systems the conformational preference is reduced in solution and the magnitude of reduction increases as the solvent polarity increases. Significantly, on one hand the solute-solvent interaction diminishes the intramolecular electron delocalization in β anomers more than in α anomers, thus destabilizing β anomers relatively. But on the other hand, it reduces the steric effect in β anomers much more than α anomers and thus stabilizes β anomers relatively more, leading to the overall reduction of the anomeric effect in anomeric systems in solutions.
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Affiliation(s)
- Changwei Wang
- The State Key Laboratory of Physical Chemistry of Solid Surfaces, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, and College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, Fujian 361005, China
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Abstract
Although carbohydrates represent one of the most important families of biomolecules, they remain under-studied in comparison to the other biomolecular families (peptides, nucleobases). Beyond their best-known function of energy source in living systems, they act as mediator of molecular recognition processes, carrying molecular information in the so-called "sugar code," just to name one of their countless functions. Owing to their high conformational flexibility, they encode extremely rich information conveyed via the non-covalent hydrogen bonds within the carbohydrate and with other biomolecular assemblies, such as peptide subunits of proteins. Over the last decade there has been tremendous progress in the study of the conformational preferences of neutral oligosaccharides, and of the interactions between carbohydrates and various molecular partners (water, aromatic models, and peptide models), using vibrational spectroscopy as a sensitive probe. In parallel, other spectroscopic techniques have recently become available to the study of carbohydrates in the gas phase (microwave spectroscopy, IRMPD on charged species).
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Affiliation(s)
- Emilio J Cocinero
- Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco (UPV - EHU), Apartado 644, 48940, Bilbao, Spain,
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23
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Santana AG, Jiménez-Moreno E, Gómez AM, Corzana F, González C, Jiménez-Oses G, Jiménez-Barbero J, Asensio JL. A dynamic combinatorial approach for the analysis of weak carbohydrate/aromatic complexes: dissecting facial selectivity in CH/π stacking interactions. J Am Chem Soc 2013; 135:3347-50. [PMID: 23418701 DOI: 10.1021/ja3120218] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A dynamical combinatorial approach for the study of weak carbohydrate/aromatic interactions is presented. This methodology has been employed to dissect the subtle structure-stability relationships that govern facial selectivity in these supramolecular complexes.
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Affiliation(s)
- Andrés G Santana
- Instituto de Química Orgánica (IQOG-CSIC), Juan de la Cierva 3, 28006 Madrid, Spain
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25
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Wang C, Chen Z, Wu W, Mo Y. How the Generalized Anomeric Effect Influences the Conformational Preference. Chemistry 2012; 19:1436-44. [DOI: 10.1002/chem.201203429] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Indexed: 11/12/2022]
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26
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Jia J, Wu HS, Chen Z, Mo Y. Elucidation of the Forces Governing the Stereochemistry of Biphenyl. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201273] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Greenway KT, Bischoff AG, Pinto BM. Probing Hyperconjugation Experimentally with the Conformational Deuterium Isotope Effect. J Org Chem 2012; 77:9221-6. [DOI: 10.1021/jo3017988] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kyle T. Greenway
- Department of Chemistry, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - Anthony G. Bischoff
- Department of Chemistry, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
| | - B. Mario Pinto
- Department of Chemistry, Simon Fraser University, Burnaby, BC, V5A 1S6, Canada
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28
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Sattelle BM, Bose-Basu B, Tessier M, Woods RJ, Serianni AS, Almond A. Dependence of pyranose ring puckering on anomeric configuration: methyl idopyranosides. J Phys Chem B 2012; 116:6380-6. [PMID: 22577942 DOI: 10.1021/jp303183y] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In the aldohexopyranose idose, the unique presence of three axial ring hydroxyl groups causes considerable conformational flexibility, rendering it challenging to study experimentally and an excellent model for rationalizing the relationship between puckering and anomeric configuration. Puckering in methyl α- and β-L-idopyranosides was predicted from kinetically rigorous 10 μs simulations using GLYCAM11 and three explicit water models (TIP3P, TIP4P, and TIP4P-EW). In each case, computed pyranose ring three-bond (vicinal) (1)H-(1)H spin couplings ((3)J(H,H)) trended with NMR measurements. These values, calculated puckering exchange rates and free energies, were independent of the water model. The α- and β-anomers were (1)C(4) chairs for 85 and >99% of their respective trajectories and underwent (1)C(4)→(4)C(1) exchange at rates of 20 μs(-1) and 1 μs(-1). Computed α-anomer (1)C(4)↔(4)C(1) puckering rates depended on the exocyclic C6 substituent, comparing hydroxymethyl with carboxyl from previous work. The slower kinetics and restricted pseudorotational profile of the β-anomer were caused by water occupying a cavity bounded by the anomeric 1-O-methyl and the C6 hydroxymethyl groups. This finding rationalizes the different methyl α- and β-L-idopyranoside (3)J(H,H) values. Identifying a relationship between idopyranose anomeric configuration, microsecond puckering, and water structure facilitates engineering of biologically and commercially important derivatives and underpins deciphering presently elusive structure-function relationships in the glycome.
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Affiliation(s)
- Benedict M Sattelle
- Faculty of Life Sciences, Manchester Interdisciplinary Biocentre, The University of Manchester, 131 Princess Street, Manchester M1 7DN, UK
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29
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Jia JF, Wu HS, Mo Y. The generalized block-localized wavefunction method: A case study on the conformational preference and C–O rotational barrier of formic acid. J Chem Phys 2012; 136:144315. [DOI: 10.1063/1.3702630] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- Jian-Feng Jia
- School of Chemistry and Material Science, Shanxi Normal University, Linfen, Shanxi 041004, China
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Juaristi E. Looking for Treasure in Stereochemistry-Land. A Path Marked by Curiosity, Obstinacy, and Serendipity. J Org Chem 2012; 77:4861-84. [DOI: 10.1021/jo300195m] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Eusebio Juaristi
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado Postal 14-740, 07000 México, DF, Mexico.
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31
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Gonthier JF, Steinmann SN, Wodrich MD, Corminboeuf C. Quantification of “fuzzy” chemical concepts: a computational perspective. Chem Soc Rev 2012; 41:4671-87. [DOI: 10.1039/c2cs35037h] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Juaristi E, Bandala Y. Anomeric Effect in Saturated Heterocyclic Ring Systems. ADVANCES IN HETEROCYCLIC CHEMISTRY 2012. [DOI: 10.1016/b978-0-12-396530-1.00002-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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