1
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Takemori H, Kanzaki C, Nomura S, Maeda T, Numata M. Catalytic effect of microflow space for supramolecular block co-polymerization of water-soluble porphyrins. Chem Commun (Camb) 2024; 60:7303-7306. [PMID: 38904123 DOI: 10.1039/d4cc02003k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2024]
Abstract
Using microflow space, a catalytic effect was achieved for supramolecular polymerization. With increasing reactivity at the polymer end, the selective connection of active monomers formed new block domains, avoiding fast homo-assembly. Binding of less-reactive monomers at the polymer end overcame steric bulkiness, affording a stable supramolecular diblock copolymer (SdiBCP).
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Affiliation(s)
- Haruna Takemori
- Department of Biomolecular Chemistry, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan.
| | - Chisako Kanzaki
- Department of Biomolecular Chemistry, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan.
| | - Shota Nomura
- Department of Biomolecular Chemistry, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan.
| | - Takato Maeda
- Department of Biomolecular Chemistry, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan.
| | - Munenori Numata
- Department of Biomolecular Chemistry, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan.
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2
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Wang C, Krupp A, Strohmann C, Grabe B, Loh CCJ. Harnessing Multistep Chalcogen Bonding Activation in the α-Stereoselective Synthesis of Iminoglycosides. J Am Chem Soc 2024; 146:10608-10620. [PMID: 38564319 PMCID: PMC11027159 DOI: 10.1021/jacs.4c00262] [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: 01/07/2024] [Revised: 03/14/2024] [Accepted: 03/15/2024] [Indexed: 04/04/2024]
Abstract
The use of noncovalent interactions (NCIs) has received significant attention as a pivotal synthetic handle. Recently, the exploitation of unconventional NCIs has gained considerable traction in challenging reaction manifolds such as glycosylation due to their capacity to facilitate entry into difficult-to-access sugars and glycomimetics. While investigations involving oxacyclic pyrano- or furanoside scaffolds are relatively common, methods that allow the selective synthesis of biologically important iminosugars are comparatively rare. Here, we report the capacity of a phosphonochalcogenide (PCH) to catalyze the stereoselective α-iminoglycosylation of iminoglycals with a wide array of glycosyl acceptors with remarkable protecting group tolerance. Mechanistic studies have illuminated the counterintuitive role of the catalyst in serially activating both the glycosyl donor and acceptor in the up/downstream stages of the reaction through chalcogen bonding (ChB). The dynamic interaction of chalcogens with substrates opens up new mechanistic opportunities based on iterative ChB catalyst engagement and disengagement in multiple elementary steps.
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Affiliation(s)
- Caiming Wang
- Abteilung
Chemische Biologie, Max Planck Institut
für Molekulare Physiologie, Otto-Hahn-Straße 11, 44227 Dortmund, Germany
- Fakultät
für Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Straße 4a, 44227 Dortmund, Germany
| | - Anna Krupp
- Anorganische
Chemie, Technische Universität Dortmund, Otto-Hahn-Straße 6, 44227 Dortmund, Germany
| | - Carsten Strohmann
- Anorganische
Chemie, Technische Universität Dortmund, Otto-Hahn-Straße 6, 44227 Dortmund, Germany
| | - Bastian Grabe
- Fakultät
für Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Straße 4a, 44227 Dortmund, Germany
| | - Charles C. J. Loh
- Abteilung
Chemische Biologie, Max Planck Institut
für Molekulare Physiologie, Otto-Hahn-Straße 11, 44227 Dortmund, Germany
- Fakultät
für Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Straße 4a, 44227 Dortmund, Germany
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3
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Orlova AV, Malysheva NN, Panova MV, Podvalnyy NM, Medvedev MG, Kononov LO. Comparison of glycosyl donors: a supramer approach. Beilstein J Org Chem 2024; 20:181-192. [PMID: 38318458 PMCID: PMC10840533 DOI: 10.3762/bjoc.20.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Accepted: 01/15/2024] [Indexed: 02/07/2024] Open
Abstract
The development of new methods for chemical glycosylation commonly includes comparison of various glycosyl donors. An attempted comparison of chemical properties of two sialic acid-based thioglycoside glycosyl donors, differing only in the substituent at O-9 (trifluoroacetyl vs chloroacetyl), at different concentrations (0.05 and 0.15 mol·L-1) led to mutually excluding conclusions concerning their relative reactivity and selectivity, which prevented us from revealing a possible influence of remote protective groups at O-9 on glycosylation outcome. According to the results of the supramer analysis of the reaction solutions, this issue might be related to the formation of supramers of glycosyl donors differing in structure hence chemical properties. These results seem to imply that comparison of chemical properties of different glycosyl donors may not be as simple and straightforward as it is usually considered.
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Affiliation(s)
- Anna V Orlova
- Laboratory of Glycochemistry, N.D. Zelinsky Institute of Organic Chemistry, Moscow, Russian Federation
| | - Nelly N Malysheva
- Laboratory of Glycochemistry, N.D. Zelinsky Institute of Organic Chemistry, Moscow, Russian Federation
| | - Maria V Panova
- Laboratory of Glycochemistry, N.D. Zelinsky Institute of Organic Chemistry, Moscow, Russian Federation
| | - Nikita M Podvalnyy
- Laboratory of Glycochemistry, N.D. Zelinsky Institute of Organic Chemistry, Moscow, Russian Federation
| | - Michael G Medvedev
- Theoretical Chemistry Group, N.D. Zelinsky Institute of Organic Chemistry, Moscow, Russian Federation
| | - Leonid O Kononov
- Laboratory of Glycochemistry, N.D. Zelinsky Institute of Organic Chemistry, Moscow, Russian Federation
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4
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Dorst KM, Engström O, Angles d'Ortoli T, Mobarak H, Ebrahemi A, Fagerberg U, Whitfield DM, Widmalm G. On the influence of solvent on the stereoselectivity of glycosylation reactions. Carbohydr Res 2024; 535:109010. [PMID: 38181544 DOI: 10.1016/j.carres.2023.109010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 12/11/2023] [Accepted: 12/11/2023] [Indexed: 01/07/2024]
Abstract
Methodology development in carbohydrate chemistry entails the stereoselective formation of C-O bonds as a key step in the synthesis of oligo- and polysaccharides. The anomeric selectivity of a glycosylation reaction is affected by a multitude of parameters, such as the nature of the donor and acceptor, activator/promotor system, temperature and solvent. The influence of different solvents on the stereoselective outcome of glycosylation reactions employing thioglucopyranosides as glycosyl donors with a non-participating protecting group at position 2 has been studied. A large change in selectivity as a function of solvent was observed and a correlation between selectivity and the Kamlet-Taft solvent parameter π* was found. Furthermore, molecular modeling using density functional theory methodology was conducted to decipher the role of the solvent and possible reaction pathways were investigated.
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Affiliation(s)
- Kevin M Dorst
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91, Stockholm, Sweden
| | - Olof Engström
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91, Stockholm, Sweden
| | - Thibault Angles d'Ortoli
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91, Stockholm, Sweden
| | - Hani Mobarak
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91, Stockholm, Sweden
| | - Azad Ebrahemi
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91, Stockholm, Sweden
| | - Ulf Fagerberg
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91, Stockholm, Sweden
| | - Dennis M Whitfield
- Sussex Research Laboratories Inc., 100 Sussex Drive Suite 1120B, Ottawa, Ontario, K1A 0R6, Canada
| | - Göran Widmalm
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91, Stockholm, Sweden.
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5
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Fukase K, Manabe Y, Shimoyama A. Diacetyl strategy for synthesis of NHAc containing glycans: enhancing glycosylation reactivity via diacetyl imide protection. Front Chem 2023; 11:1319883. [PMID: 38116104 PMCID: PMC10728286 DOI: 10.3389/fchem.2023.1319883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 11/21/2023] [Indexed: 12/21/2023] Open
Abstract
The presence of NHAc groups in the substrates (both glycosyl donors and acceptors) significantly reduced the reactivity of glycosylation. This decrease was attributed to the NHAc groups forming intermolecular hydrogen bonds by the NHAc groups, thereby reducing molecular mobility. Hence, a diacetyl strategy involving the temporary conversion of NHAc to diacetyl imide (NAc2) was developed for the synthesis of NHAc-containing glycans. This strategy has two significant advantages for oligosaccharide synthesis. The NAc2 protection of NHAc substantially enhances the rate of glycosylation reactions, resulting in improved yields. Moreover, NAc2 can be readily reverted to NHAc by the simple removal of one acetyl group under mild basic conditions, obviating the necessity for treating the polar amino group. We have achieved the efficient synthesis of oligosaccharides containing GlcNHAc and N-glycans containing sialic acid using the diacetyl strategy.
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Affiliation(s)
- Koichi Fukase
- Department of Chemistry, Graduate School of Science, Osaka University, Osaka, Japan
- Forefront Research Center, Graduate School of Science, Osaka University, Osaka, Japan
| | - Yoshiyuki Manabe
- Department of Chemistry, Graduate School of Science, Osaka University, Osaka, Japan
- Forefront Research Center, Graduate School of Science, Osaka University, Osaka, Japan
| | - Atsushi Shimoyama
- Department of Chemistry, Graduate School of Science, Osaka University, Osaka, Japan
- Forefront Research Center, Graduate School of Science, Osaka University, Osaka, Japan
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6
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Kononov LO, Fukase K, Bunkin NF. Editorial: Chemical reactivity and solution structure. Front Chem 2023; 11:1293697. [PMID: 37822774 PMCID: PMC10562685 DOI: 10.3389/fchem.2023.1293697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 09/19/2023] [Indexed: 10/13/2023] Open
Affiliation(s)
- Leonid O Kononov
- Laboratory of GlycoChemistry, N. D. Zelinsky Institute of Organic Chemistry, Moscow, Russia
| | - Koichi Fukase
- Department of Chemistry, Osaka University, Osaka, Japan
| | - Nikolai F Bunkin
- Department of Fundamental Sciences, Bauman Moscow State Technical University, Moscow, Russia
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7
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Rao VUB, Wang C, Demarque DP, Grassin C, Otte F, Merten C, Strohmann C, Loh CCJ. A synergistic Rh(I)/organoboron-catalysed site-selective carbohydrate functionalization that involves multiple stereocontrol. Nat Chem 2023; 15:424-435. [PMID: 36585443 PMCID: PMC9986112 DOI: 10.1038/s41557-022-01110-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Accepted: 11/16/2022] [Indexed: 12/31/2022]
Abstract
Site-selective functionalization is a core synthetic strategy that has broad implications in organic synthesis. Particularly, exploiting chiral catalysis to control site selectivity in complex carbohydrate functionalizations has emerged as a leading method to unravel unprecedented routes into biologically relevant glycosides. However, robust catalytic systems available to overcome multiple facets of stereoselectivity challenges to this end still remain scarce. Here we report a synergistic chiral Rh(I)- and organoboron-catalysed protocol, which enables access into synthetically challenging but biologically relevant arylnaphthalene glycosides. Our method depicts the employment of chiral Rh(I) catalysis in site-selective carbohydrate functionalization and showcases the utility of boronic acid as a compatible co-catalyst. Crucial to the success of our method is the judicious choice of a suitable organoboron catalyst. We also determine that exquisite multiple aspects of stereocontrol, including enantio-, diastereo-, regio- and anomeric control and dynamic kinetic resolution, are concomitantly operative.
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Affiliation(s)
- V U Bhaskara Rao
- Abteilung Chemische Biologie, Max Planck Institut für Molekulare Physiologie, Dortmund, Germany.,Fakültät für Chemie und Chemische Biologie, Technische Universität Dortmund, Dortmund, Germany
| | - Caiming Wang
- Abteilung Chemische Biologie, Max Planck Institut für Molekulare Physiologie, Dortmund, Germany.,Fakültät für Chemie und Chemische Biologie, Technische Universität Dortmund, Dortmund, Germany
| | | | | | - Felix Otte
- Department of Inorganic Chemistry, Technische Universität Dortmund, Dortmund, Germany
| | | | - Carsten Strohmann
- Department of Inorganic Chemistry, Technische Universität Dortmund, Dortmund, Germany
| | - Charles C J Loh
- Abteilung Chemische Biologie, Max Planck Institut für Molekulare Physiologie, Dortmund, Germany. .,Fakültät für Chemie und Chemische Biologie, Technische Universität Dortmund, Dortmund, Germany.
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8
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Phase-Transfer Catalyzed Microfluidic Glycosylation: A Small Change in Concentration Results in a Dramatic Increase in Stereoselectivity. Catalysts 2023. [DOI: 10.3390/catal13020313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Phase-transfer catalysis (PTC) is widely used in glycochemistry for the preparation of aryl glycosides by the glycosylation reaction. While investigating the possibility of synthesis of 4-(3-chloropropoxy)phenyl sialoside (Neu5Ac-OCPP) from N-acetylsialyl chloride with O-acetyl groups (1), we have recently discovered a strong dependence of the PTC glycosylation outcome on the mixing mode: under batch conditions, only α-anomer of Neu5Ac-OCPP was obtained, albeit in low yield (13%), while under microfluidic conditions the yield of Neu5Ac-OCPP increased to 36%, although stereoselectivity decreased (α/β ≤ 6.2). Here, we report that the outcome of this reaction, performed under microfluidic conditions using a Comet X-01 micromixer (at 2 μL/min flow rate), non-linearly depends on the concentration of N-acetylsialyl chloride 1 (5–200 mmol/L). The target Neu5Ac-OCPP was obtained in a noticeably higher yield (up to 66%) accompanied by enhanced stereoselectivity (α/β = 17:1–32:1) in the high concentration range (C > 50 mmol/L), whereas the yield (10–36%) and especially, stereoselectivity (α/β = 0.9:1–6.2:1) were lower in the low concentration range (C ≤ 50 mmol/L). This dramatic stepwise increase in stereoselectivity above critical concentration (50 mmol/L) is apparently related to the changes in the presentation of molecules on the surface of supramers of glycosyl donor, which exist in different concentration ranges.
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9
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Ryzhkina I, Murtazina L, Kostina L, Dokuchaeva I, Sergeeva S, Meleshenko K, Shevelev M, Petrov A. Doxorubicin aqueous systems at low concentrations: Interconnection between self-organization, fluorescent and physicochemical properties, and action on hydrobionts. Front Chem 2022; 10:1063278. [PMID: 36531320 PMCID: PMC9751371 DOI: 10.3389/fchem.2022.1063278] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 11/15/2022] [Indexed: 08/13/2023] Open
Abstract
Doxorubicin (Dox) is a highly effective cytostatic antibiotic that exhibits activity against a wide range of malignant neoplasms and is often used as the basis of various anti-tumor compositions. However, the use of Dox in therapeutic doses is associated with high systemic toxicity, which makes it urgent to find ways to reduce therapeutic concentrations, which is necessary primarily to minimize the side effects on the patient's body, as well as to reduce the harmful effects on aquatic ecosystems, commonly polluted by toxic pharmaceuticals. Studying the self-organization, physicochemical and spectral patterns, and their relation to bioeffects of Dox solutions in the range of low concentrations can reveal useful insights into the unknown effects of Dox as a cytostatic and potential pollutant of ecosystems. The self-organization in solutions and on substrates, physicochemical and spectral properties, and action of Dox solutions on hydrobionts were studied in the range of calculated concentrations from 1·10-20 to 1·10-4 M by methods of dynamic and electrophoretic light scattering (DLS and ELS), scanning electron microscopy (SEM), scanning probe microscopy (SPM), fluorescence spectroscopy, UV absorption spectroscopy, conductometry, tensiometry, pH-metry. Certified techniques for monitoring the toxicity of natural water and wastewater were used to establish the interconnection between these phenomena. It was shown that aqueous solutions of Dox are dispersed systems which rearrange their dispersed phase measuring hundreds of nm in size (nanoassociates) at dilution, followed by concerted changes in nanoassociates' parameters (size and ζ-potential) and properties of systems, as well as their bioassay results. SPM and SEM results confirm and complement the DLS and ELS data indicating the existence of nanoassociates in dilute Dox solutions.
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Affiliation(s)
- Irina Ryzhkina
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russia
| | - Lyaisan Murtazina
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russia
| | - Larisa Kostina
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russia
| | - Irina Dokuchaeva
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russia
| | - Svetlana Sergeeva
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russia
| | - Kristina Meleshenko
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russia
| | - Maxim Shevelev
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, Kazan, Russia
| | - Andrew Petrov
- Institute for Problems of Ecology and Mineral Wealth Use of Tatarstan Academy of Sciences, Kazan, Russia
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10
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Hernández-Lima J, Ramírez-Gualito K, Quiroz-García B, Silva-Portillo AL, Carrillo-Nava E, Cortés-Guzmán F. How solvent determines the molecular reactive conformation and the selectivity: Solvation spheres and energy. Front Chem 2022; 10:1012769. [PMID: 36247683 PMCID: PMC9557062 DOI: 10.3389/fchem.2022.1012769] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 09/07/2022] [Indexed: 11/13/2022] Open
Abstract
In solution, the solvent determines the molecular conformation and the chemical reaction viability and selectivity. When solvent-solute and solvent-solvent interactions present similar strengths, explicit salvation is the best way to describe a system. The problem to solve is how big the explicit shell should be. In this paper, we want to answer one of the fundamental questions in the implementation of explicit solvation, exactly how many solvent molecules should be added and where they should be placed. Here we determine the first solvent sphere around a molecule and describe how it controls the conformation and selectivity of a selected reaction. NMR experiments were carried out to identify the number of solvent molecules around the solute that constitutes the first solvent sphere, and the interaction between this solvent sphere and the solute was detected using DFT and QTAIM calculations. A new approach to the solvation energy is presented. Finally, we established the role of solvent molecules in the conformation of the solute and in the transition states that produce the two possible products of the reaction.
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Affiliation(s)
| | - Karla Ramírez-Gualito
- Centro de Nanociencias y Micro y Nanotecnologías, Instituto Politécnico Nacional, Ciudad de Mexico, México
| | | | | | | | - Fernando Cortés-Guzmán
- Instituto de Química, Unversidad Nacional Autónoma de México, Coyoacan, Mexico
- *Correspondence: Fernando Cortés-Guzmán,
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11
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L-Tryptophan Aqueous Systems at Low Concentrations: Interconnection between Self-Organization, Fluorescent and Physicochemical Properties, and Action on Hydrobionts. NANOMATERIALS 2022; 12:nano12111792. [PMID: 35683651 PMCID: PMC9182180 DOI: 10.3390/nano12111792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/04/2022] [Accepted: 05/21/2022] [Indexed: 02/01/2023]
Abstract
As shown by fluorescence monitoring of dissolved organic matter, amino acid L-Trp can be present in natural water. The consequences of the presence of L-Trp at low concentrations in surface water systems are not yet established for hydrobionts. Studying the physicochemical patterns, as well as their relationships to the bioeffects of L-Trp solutions in the low concentration range, can provide new and important information regarding the unknown effects of L-Trp. The self-organization, physicochemical properties, fluorescence, UV absorption, and action of L-Trp solutions on Paramecium caudatum infusoria, Chlorella vulgaris algae were studied in the calculated concentrations range of 1 × 10−20–1 × 10−2 mol/L. The relationship between these phenomena was established using the certified procedures for monitoring the toxicity of natural water and wastewater. It was shown for the first time that aqueous solutions of L-Trp are dispersed systems in which the dispersed phase (nanoassociates) undergoes a rearrangement with dilution, accompanied by coherent changes in the nanoassociates’ parameters and the properties of systems. The non-monotonic concentration dependence of fluorescence intensity (λex at 225 nm, λem at 340 nm) is in good agreement with the data on the nanoassociates’ parameters, as well as with both the physicochemical properties of the systems and their bioassay results.
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12
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Myachin IV, Mamirgova ZZ, Stepanova EV, Zinin AI, Chizhov AO, Kononov L. Black swan in phase transfer catalysis: influence of mixing mode on the stereoselectivity of glycosylation. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ilya V. Myachin
- Zelinsky Institute of Organic Chemistry RAS: Institut organiceskoj himii imeni N D Zelinskogo RAN Laboratory of Glycochemistry RUSSIAN FEDERATION
| | - Zarina Z. Mamirgova
- Zelinsky Institute of Organic Chemistry RAS: Institut organiceskoj himii imeni N D Zelinskogo RAN Laboratory of Glycochemistry RUSSIAN FEDERATION
| | - Elena V. Stepanova
- Zelinsky Institute of Organic Chemistry RAS: Institut organiceskoj himii imeni N D Zelinskogo RAN Laboraory of Glycochemistry RUSSIAN FEDERATION
| | - Alexander I. Zinin
- Zelinsky Institute of Organic Chemistry RAS: Institut organiceskoj himii imeni N D Zelinskogo RAN Laboratory of Glycochemistry RUSSIAN FEDERATION
| | - Alexander O. Chizhov
- Zelinsky Institute of Organic Chemistry RAS: Institut organiceskoj himii imeni N D Zelinskogo RAN Laboratory of Glycochemistry RUSSIAN FEDERATION
| | - Leonid Kononov
- N.D. Zelinsky Institute of Organic Chemistry Laboratory of Glycochemistry Leninsky prosp., 47 119991 Moscow RUSSIAN FEDERATION
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13
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Orlova AV, Ahiadorme DA, Laptinskaya TV, Kononov LO. Supramer analysis of 2,3,5-tri-O-benzoyl-α-d-arabinofuranosyl bromide solutions in different solvents: supramolecular aggregation of solute molecules in 1,2-dichloroethane mediated by halogen bonds. Russ Chem Bull 2022. [DOI: 10.1007/s11172-021-3335-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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14
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Panova MV, Medvedev MG, Orlova AV, Kononov LO. Exhaustive Conformational Search for Sialyl Cation Reveals Possibility of Remote Participation of Acyl Groups. Chemphyschem 2021; 23:e202100788. [PMID: 34837303 DOI: 10.1002/cphc.202100788] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/26/2021] [Indexed: 11/11/2022]
Abstract
Finding convenient ways for the stereoselective α-sialylation is important due to the high practical significance of α-sialic acid-containing glycans and neoglycoconjugates. It was proposed that sialylation stereoselectivity is determined by the structure of the sialyl cation (also known in biochemistry as "sialosyl cation"), a supposed intermediate in this reaction. Here we design a new approach for studying the conformational space of highly flexible sialyl cation and find 1625 unique conformers including those stabilized by covalent remote participation (also known as long-range participation) of 4-O-acetyl (4-OAc), 5-N-trifluoroacetyl (5-NTFA), as well as 7,8,9-OAc from both α and β sides. The most energetically stable sialyl cation conformers are featured by 4-OAc participation, closely followed by 5-NTFA- and 7-OAc-stabilized conformers; unstabilized sialyl cation conformers are ∼10 kcal mol-1 less stable than the 4-OAc-stabilized ones. Analysis of all the obtained conformers by means of substituents positions, side chain conformations and ring puckering led us to a new "eight-conformer hypothesis" which describes interconversions among the most important sialyl cation conformers and predicts that stronger remote participation of acyl groups favors β-anomers. Thus, selective synthesis of the desired α-sialosides requires minimization of acyl groups participation.
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Affiliation(s)
- Maria V Panova
- Laboratory of Glycochemistry, N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect 47, 119991, Moscow, Russian Federation
| | - Michael G Medvedev
- Group of Theoretical Chemistry, N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect 47, 119991, Moscow, Russian Federation
| | - Anna V Orlova
- Laboratory of Glycochemistry, N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect 47, 119991, Moscow, Russian Federation
| | - Leonid O Kononov
- Laboratory of Glycochemistry, N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect 47, 119991, Moscow, Russian Federation
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15
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Exploiting non-covalent interactions in selective carbohydrate synthesis. Nat Rev Chem 2021; 5:792-815. [PMID: 37117666 DOI: 10.1038/s41570-021-00324-y] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/10/2021] [Indexed: 02/08/2023]
Abstract
Non-covalent interactions (NCIs) are a vital component of biological bond-forming events, and have found important applications in multiple branches of chemistry. In recent years, the biomimetic exploitation of NCIs in challenging glycosidic bond formation and glycofunctionalizations has attracted significant interest across diverse communities of organic and carbohydrate chemists. This emerging theme is a major new direction in contemporary carbohydrate chemistry, and is rapidly gaining traction as a robust strategy to tackle long-standing issues such as anomeric and site selectivity. This Review thus seeks to provide a bird's-eye view of wide-ranging advances in harnessing NCIs within the broad field of synthetic carbohydrate chemistry. These include the exploitation of NCIs in non-covalent catalysed glycosylations, in non-covalent catalysed glycofunctionalizations, in aglycone delivery, in stabilization of intermediates and transition states, in the existence of intramolecular hydrogen bonding networks and in aggregation by hydrogen bonds. In addition, recent emerging opportunities in exploiting halogen bonding and other unconventional NCIs, such as CH-π, cation-π and cation-n interactions, in various aspects of carbohydrate chemistry are also examined.
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16
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Abstract
The fates of organic hydroperoxides (ROOHs) in atmospheric condensed phases are key to understanding the oxidative and toxicological potentials of particulate matter. Recently, mass spectrometric detection of ROOHs as chloride anion adducts has revealed that liquid-phase α-hydroxyalkyl hydroperoxides, derived from hydration of carbonyl oxides (Criegee intermediates), decompose to geminal diols and H2O2 over a time frame that is sensitively dependent on the water content, pH, and temperature of the reaction solution. Based on these findings, it has been proposed that H+-catalyzed conversion of ROOHs to ROHs + H2O2 is a key process for the decomposition of ROOHs that bypasses radical formation. In this perspective, we discuss our current understanding of the aqueous-phase decomposition of atmospherically relevant ROOHs, including ROOHs derived from reaction between Criegee intermediates and alcohols or carboxylic acids, and of highly oxygenated molecules (HOMs). Implications and future challenges are also discussed.
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Affiliation(s)
- Shinichi Enami
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan
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17
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Gradzielski M, Duvail M, de Molina PM, Simon M, Talmon Y, Zemb T. Using Microemulsions: Formulation Based on Knowledge of Their Mesostructure. Chem Rev 2021; 121:5671-5740. [PMID: 33955731 DOI: 10.1021/acs.chemrev.0c00812] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Microemulsions, as thermodynamically stable mixtures of oil, water, and surfactant, are known and have been studied for more than 70 years. However, even today there are still quite a number of unclear aspects, and more recent research work has modified and extended our picture. This review gives a short overview of how the understanding of microemulsions has developed, the current view on their properties and structural features, and in particular, how they are related to applications. We also discuss more recent developments regarding nonclassical microemulsions such as surfactant-free (ultraflexible) microemulsions or ones containing uncommon solvents or amphiphiles (like antagonistic salts). These new findings challenge to some extent our previous understanding of microemulsions, which therefore has to be extended to look at the different types of microemulsions in a unified way. In particular, the flexibility of the amphiphilic film is the key property to classify different microemulsion types and their properties in this review. Such a classification of microemulsions requires a thorough determination of their structural properties, and therefore, the experimental methods to determine microemulsion structure and dynamics are reviewed briefly, with a particular emphasis on recent developments in the field of direct imaging by means of electron microscopy. Based on this classification of microemulsions, we then discuss their applications, where the application demands have to be met by the properties of the microemulsion, which in turn are controlled by the flexibility of their amphiphilic interface. Another frequently important aspect for applications is the control of the rheological properties. Normally, microemulsions are low viscous and therefore enhancing viscosity has to be achieved by either having high concentrations (often not wished for) or additives, which do not significantly interfere with the microemulsion. Accordingly, this review gives a comprehensive account of the properties of microemulsions, including most recent developments and bringing them together from a united viewpoint, with an emphasis on how this affects the way of formulating microemulsions for a given application with desired properties.
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Affiliation(s)
- Michael Gradzielski
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, D-10623 Berlin, Germany
| | - Magali Duvail
- ICSM, Université Montpellier, CEA, CNRS, ENSCM, 30207 Marcoule, France
| | - Paula Malo de Molina
- Centro de Física de Materiales (CFM) (CSIC-UPV/EHU)-Materials Physics Center (MPC), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain.,IKERBASQUE - Basque Foundation for Science, María Díaz de Haro 3, 48013 Bilbao, Spain
| | - Miriam Simon
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, D-10623 Berlin, Germany.,Department of Chemical Engineering and the Russell Berrie Nanotechnolgy Inst. (RBNI), Technion-Israel Institute of Technology, Haifa, IL-3200003, Israel
| | - Yeshayahu Talmon
- Department of Chemical Engineering and the Russell Berrie Nanotechnolgy Inst. (RBNI), Technion-Israel Institute of Technology, Haifa, IL-3200003, Israel
| | - Thomas Zemb
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institut für Chemie, Technische Universität Berlin, D-10623 Berlin, Germany.,ICSM, Université Montpellier, CEA, CNRS, ENSCM, 30207 Marcoule, France
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18
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Kulagina TP, Smirnov LP, Andrianova ZS. Simulation of a Low-Frequency Mechanical Impact on a Liquid-Phase Reaction With Temporal Instability and Association of Reagent Molecules. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2021. [DOI: 10.1134/s1990793121030088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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19
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Bunkin NF, Shkirin AV, Penkov NV, Goltayev MV, Ignatiev PS, Gudkov SV, Izmailov AY. Effect of Gas Type and Its Pressure on Nanobubble Generation. Front Chem 2021; 9:630074. [PMID: 33869139 PMCID: PMC8044797 DOI: 10.3389/fchem.2021.630074] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 01/13/2021] [Indexed: 12/31/2022] Open
Abstract
The dependence of the volume number density of ion-stabilized gas nanobubbles (bubstons) on the type of gas and the pressure created by this gas in deionized water and saline solution has been investigated. The range of external pressures from the saturated water vapor (17 Torr) to 5 atm was studied. It turned out that the growth rate of the volume number density of bubstons is controlled by the magnitude of the molecular polarizability of dissolved gases. The highest densities of bubstons were obtained for gases whose molecules have a dipole moment. At fixed external pressure and the polarizability of gas molecules, the addition of external ions leads to a sharp increase in the content of bubstons.
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Affiliation(s)
- Nikolai F Bunkin
- Bauman Moscow State Technical University, Moscow, Russia.,Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia
| | - Alexey V Shkirin
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia.,National Research Nuclear University MEPhI, Moscow, Russia
| | - Nikita V Penkov
- Federal Research Center "Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences", Institute of Cell Biophysics of the Russian Academy of Sciences, Moscow, Russia
| | - Mikhail V Goltayev
- Federal Research Center "Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences", Institute of Cell Biophysics of the Russian Academy of Sciences, Moscow, Russia
| | - Pavel S Ignatiev
- JSC "Production Association "Ural Optical and Mechanical Plant named after E.S. Yalamov" (UOMZ), Ekaterinburg, Russia
| | - Sergey V Gudkov
- Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow, Russia.,Federal State Budgetary Scientific Institution "Federal Scientific Agroengineering Center VIM"(FSAC VIM), Moscow, Russia
| | - Andrey Yu Izmailov
- Federal State Budgetary Scientific Institution "Federal Scientific Agroengineering Center VIM"(FSAC VIM), Moscow, Russia
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20
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Hu M, Qiu J, Tonokura K, Enami S. Aqueous-phase fates of α-alkoxyalkyl-hydroperoxides derived from the reactions of Criegee intermediates with alcohols. Phys Chem Chem Phys 2021; 23:4605-4614. [PMID: 33620039 DOI: 10.1039/d0cp06308h] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
In the atmosphere, carbonyl oxides known as Criegee intermediates are produced mainly by ozonolysis of volatile organic compounds containing C[double bond, length as m-dash]C double bonds, such as biogenic terpenoids. Criegee intermediates can react with OH-containing species to produce labile organic hydroperoxides (ROOHs) that are taken up into atmospheric condensed phases. Besides water, alcohols are an important reaction partner of Criegee intermediates and can convert them into α-alkoxyalkyl-hydroperoxides (α-AHs), R1R2C(-OOH)(-OR'). Here, we report a study on the aqueous-phase fates of α-AHs derived from ozonolysis of α-terpineol in the presence of methanol, ethanol, 1-propanol, and 2-propanol. The α-terpineol α-AHs and the decomposition products were detected as their chloride adducts by electrospray mass spectrometry as a function of reaction time. Our discovery that the rate of decomposition of α-AHs increased as the pH decreased from 5.9 to 3.8 implied that the decomposition mechanism was catalyzed by H+. The use of isotope solvent experiments revealed that a primary decomposition product of α-AHs in an acidic aqueous solution was a hemiacetal R1R2C(-OH)(-OR') species that was further transformed into other products such as lactols. The proposed H+-catalyzed decomposition of α-AHs, which provides H2O2 and multifunctional species in ambient aerosol particles, may be faster than other degradation processes (e.g., photolysis by solar radiation).
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Affiliation(s)
- Mingxi Hu
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Junting Qiu
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Kenichi Tonokura
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Shinichi Enami
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan.
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21
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Shirshin KK, Esipovich AL, Kazantsev OA, Rumyantsev M, Korotaev MS, Rogozhin AE. Specific Organocatalysis in Amidation Reaction of Fatty Acid Methyl Esters with 3‐(Dimethylamino)‐1‐propylamine. ChemistrySelect 2021. [DOI: 10.1002/slct.202003197] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Konstantin K. Shirshin
- Nizhny Novgorod State Technical University n.a. R.E. Alexeev Russian Federation Nizhni Novgorod 24 Ulitsa Minina (Minin street)
| | - Anton L. Esipovich
- Nizhny Novgorod State Technical University n.a. R.E. Alexeev Russian Federation Nizhni Novgorod 24 Ulitsa Minina (Minin street)
| | - Oleg A. Kazantsev
- Nizhny Novgorod State Technical University n.a. R.E. Alexeev Russian Federation Nizhni Novgorod 24 Ulitsa Minina (Minin street)
| | - Misha Rumyantsev
- Nizhny Novgorod State Technical University n.a. R.E. Alexeev Russian Federation Nizhni Novgorod 24 Ulitsa Minina (Minin street)
| | - Mikhail S. Korotaev
- Nizhny Novgorod State Technical University n.a. R.E. Alexeev Russian Federation Nizhni Novgorod 24 Ulitsa Minina (Minin street)
| | - Anton E. Rogozhin
- Nizhny Novgorod State Technical University n.a. R.E. Alexeev Russian Federation Nizhni Novgorod 24 Ulitsa Minina (Minin street)
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22
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A robust and tunable halogen bond organocatalyzed 2-deoxyglycosylation involving quantum tunneling. Nat Commun 2020; 11:4911. [PMID: 32999276 PMCID: PMC7527348 DOI: 10.1038/s41467-020-18595-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 08/26/2020] [Indexed: 11/10/2022] Open
Abstract
The development of noncovalent halogen bonding (XB) catalysis is rapidly gaining traction, as isolated reports documented better performance than the well-established hydrogen bonding thiourea catalysis. However, convincing cases allowing XB activation to be competitive in challenging bond formations are lacking. Herein, we report a robust XB catalyzed 2-deoxyglycosylation, featuring a biomimetic reaction network indicative of dynamic XB activation. Benchmarking studies uncovered an improved substrate tolerance compared to thiourea-catalyzed protocols. Kinetic investigations reveal an autoinductive sigmoidal kinetic profile, supporting an in situ amplification of a XB dependent active catalytic species. Kinetic isotopic effect measurements further support quantum tunneling in the rate determining step. Furthermore, we demonstrate XB catalysis tunability via a halogen swapping strategy, facilitating 2-deoxyribosylations of D-ribals. This protocol showcases the clear emergence of XB catalysis as a versatile activation mode in noncovalent organocatalysis, and as an important addition to the catalytic toolbox of chemical glycosylations. Halogen bonding (HB) catalysis is rapidly gaining momentum, however, cases of XB activation for challenging bonds formation are rare. Here, the authors show a robust XB catalyzed 2-deoxyglycosylation with broad scope and featuring a quantum tunneling phenomenon in the proton transfer rate determining step.
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23
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Shishkina LN, Kozlov MV, Mazaletskaya LI, Povkh AY, Shvydkiy VO, Sheludchenko NI. Regulatory System of Lipid Peroxidation as a Basis for Ecological Testing. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2020. [DOI: 10.1134/s1990793120030240] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Abronina PI, Zinin AI, Chizhov AO, Kononov LO. Unusual Outcome of Glycosylation: Hydrogen‐Bond Mediated Control of Stereoselectivity by
N
‐Trifluoroacetyl Group? European J Org Chem 2020. [DOI: 10.1002/ejoc.202000520] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Polina I. Abronina
- N.K. Kochetkov Laboratory of Carbohydrate Chemistry N.D. Zelinsky Institute of Organic Chemistry Leninsky prosp. 47 119991 Moscow Russian Federation
| | - Alexander I. Zinin
- N.K. Kochetkov Laboratory of Carbohydrate Chemistry N.D. Zelinsky Institute of Organic Chemistry Leninsky prosp. 47 119991 Moscow Russian Federation
| | - Alexander O. Chizhov
- N.K. Kochetkov Laboratory of Carbohydrate Chemistry N.D. Zelinsky Institute of Organic Chemistry Leninsky prosp. 47 119991 Moscow Russian Federation
| | - Leonid O. Kononov
- N.K. Kochetkov Laboratory of Carbohydrate Chemistry N.D. Zelinsky Institute of Organic Chemistry Leninsky prosp. 47 119991 Moscow Russian Federation
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25
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Bizzarri M, Giuliani A, Monti N, Verna R, Pensotti A, Cucina A. Rediscovery of natural compounds acting via multitarget recognition and noncanonical pharmacodynamical actions. Drug Discov Today 2020; 25:920-927. [DOI: 10.1016/j.drudis.2020.02.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 02/20/2020] [Accepted: 02/26/2020] [Indexed: 12/23/2022]
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26
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Orlova AV, Laptinskaya TV, Malysheva NN, Kononov LO. Light Scattering in Non-aqueous Solutions of Low-Molecular-Mass Compounds: Application for Supramer Analysis of Reaction Solutions. J SOLUTION CHEM 2020. [DOI: 10.1007/s10953-020-00977-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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27
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Qiu J, Liang Z, Tonokura K, Colussi AJ, Enami S. Stability of Monoterpene-Derived α-Hydroxyalkyl-Hydroperoxides in Aqueous Organic Media: Relevance to the Fate of Hydroperoxides in Aerosol Particle Phases. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:3890-3899. [PMID: 32131591 DOI: 10.1021/acs.est.9b07497] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The α-hydroxyalkyl-hydroperoxides [R-(H)C(-OH)(-OOH), α-HH] produced in the ozonolysis of unsaturated organic compounds may contribute to secondary organic aerosol (SOA) aging. α-HHs' inherent instability, however, hampers their detection and a positive assessment of their actual role. Here we report, for the first time, the rates and products of the decomposition of the α-HHs generated in the ozonolysis of atmospherically important monoterpenes α-pinene (α-P), d-limonene (d-L), γ-terpinene (γ-Tn), and α-terpineol (α-Tp) in water/acetonitrile (W/AN) mixtures. We detect α-HHs and multifunctional decomposition products as chloride adducts by online electrospray ionization mass spectrometry. Experiments involving D2O and H218O, instead of H216O, and an OH-radical scavenger show that α-HHs decompose into gem-diols + H2O2 rather than free radicals. α-HHs decay mono- or biexponentially depending on molecular structure and solvent composition. e-Fold times, τ1/e, in water-rich solvent mixtures range from τ1/e = 15-45 min for monoterpene-derived α-HHs to τ1/e > 103 min for the α-Tp-derived α-HH. All τ1/e's dramatically increase in <20% (v/v) water. Decay rates of the α-Tp-derived α-HH in pure water increase at lower pH (2.3 ≤ pH ≤ 3.3). The hydroperoxides detected in day-old SOA samples may reflect their increased stability in water-poor media and/or the slow decomposition of α-HHs from functionalized terpenes.
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Affiliation(s)
- Junting Qiu
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Zhancong Liang
- School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Kenichi Tonokura
- Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Agustín J Colussi
- Ronald and Maxine Linde Center for Global Environmental Science, California Institute of Technology, Pasadena, California 91125, United States
| | - Shinichi Enami
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan
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28
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Editorial overview: Colloidal and interfacial challenges related to separations, analysis and recycling. Curr Opin Colloid Interface Sci 2020. [DOI: 10.1016/j.cocis.2020.08.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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29
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Ramamoorthy RK, Levesque M, Belloni L, Carriere D. Structure Factor of EuCl 3 Aqueous Solutions via Coupled Molecular Dynamics Simulations and Integral Equations. J Phys Chem B 2020; 124:1787-1793. [PMID: 32026687 DOI: 10.1021/acs.jpcb.9b11537] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Identifying the structure of an aqueous solution is essential to rationalize various phenomena such as crystallization in solution, chemical reactivity, extraction of rare earth elements, and so forth. Despite this, the efforts to describe the structure of an aqueous solution have been hindered by the difficulty to retrieve structural data both from experiments and simulations. To overcome this, first, undersaturated EuCl3 aqueous solutions of concentrations varying from 0.15 to 1.8 mol/kg were studied using X-ray scattering. Second, for the first time, the theoretical X-ray signal of 1.8 mol/kg EuCl3 aqueous solution was simulated, with precise details for the complete range of scattering vectors using coupled molecular dynamics and hypernetted chain integral equations, and satisfactorily compared with the 1.8 mol/kg experimental X-ray scattering signal. The theoretical calculations demonstrate that the experimental structure factor is dominated by Eu3+-Eu3+ correlations.
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Affiliation(s)
| | - Maximilien Levesque
- PASTEUR, Département de Chimie, École Normale Supérieure, PSL University, Sorbonne Université, CNRS, 75005 Paris, France
| | - Luc Belloni
- Université Paris-Saclay, CEA, CNRS, NIMBE, LIONS, 91191 Gif-sur-Yvette, France
| | - David Carriere
- Université Paris-Saclay, CEA, CNRS, NIMBE, LIONS, 91191 Gif-sur-Yvette, France
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Burygin GL, Abronina PI, Podvalnyy NM, Staroverov SA, Kononov LO, Dykman LA. Preparation and in vivo evaluation of glyco-gold nanoparticles carrying synthetic mycobacterial hexaarabinofuranoside. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2020; 11:480-493. [PMID: 32274287 PMCID: PMC7113550 DOI: 10.3762/bjnano.11.39] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 02/20/2020] [Indexed: 05/07/2023]
Abstract
A number of bacterial glycans are specific markers for the detection and the serological identification of microorganisms and are also widely used as antigenic components of vaccines. The use of gold nanoparticles as carriers for glyco-epitopes is becoming an important alternative to the traditional conjugation with proteins and synthetic polymers. In this study, we aimed to prepare and evaluate in vivo glyco-gold nanoparticles (glyco-GNPs) bearing the terminal-branched hexaarabinofuranoside fragment (Ara6) of arabinan domains of lipoarabinomannan and arabinogalactan, which are principal polysaccharides of the cell wall of Mycobacterium tuberculosis, the causative agent of tuberculosis. In particular, we were interested whether the antibodies generated against Ara6-GNPs would recognize the natural saccharides on the cell surface of different mycobacterial strains. Two synthetic Ara6 glycosides with amino-functionalized spacer aglycons differing in length and hydrophilicity were directly conjugated with spherical gold nanoparticles (d = 15 nm) to give two sets of glyco-GNPs, which were used for the immunization of rabbits. Dot assays revealed cross-reactions between the two obtained antisera with the hexaarabinofuranoside and the 2-aminoethyl aglycon used for the preparation of glyco-GNPs. Both antisera contained high titers of antibodies specific for Mycobacteria as shown by enzyme-linked immunosorbent assay using M. bovis and M. smegmatis cells as antigens while there was only a weak response to M. phlei cells and no interaction with E. coli cells. The results obtained suggest that glyco-GNPs are promising agents for the generation of anti-mycobacterial antibodies.
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Affiliation(s)
- Gennady L Burygin
- Laboratory of Immunochemistry, Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov 13, Saratov, 410049, Russia
- Department of Horticulture, Breeding, and Genetics, Vavilov Saratov State Agrarian University, Teatralnaya Ploshchad 1, Saratov, 410012, Russia
| | - Polina I Abronina
- Laboratory of Carbohydrate Chemistry, N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospekt 47, Moscow, 119991, Russia
| | - Nikita M Podvalnyy
- Laboratory of Carbohydrate Chemistry, N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospekt 47, Moscow, 119991, Russia
| | - Sergey A Staroverov
- Laboratory of Immunochemistry, Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov 13, Saratov, 410049, Russia
| | - Leonid O Kononov
- Laboratory of Carbohydrate Chemistry, N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospekt 47, Moscow, 119991, Russia
- Phystech School of Biological and Medical Physics, Moscow Institute of Physics and Technology (National Research University), Institutsky per. 9, Dolgoprudnyi, Moscow Region, 141701, Russia
| | - Lev A Dykman
- Laboratory of Immunochemistry, Institute of Biochemistry and Physiology of Plants and Microorganisms, Russian Academy of Sciences, Prospekt Entuziastov 13, Saratov, 410049, Russia
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Qiu J, Ishizuka S, Tonokura K, Colussi AJ, Enami S. Water Dramatically Accelerates the Decomposition of α-Hydroxyalkyl-Hydroperoxides in Aerosol Particles. J Phys Chem Lett 2019; 10:5748-5755. [PMID: 31498633 PMCID: PMC6778917 DOI: 10.1021/acs.jpclett.9b01953] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Accepted: 09/09/2019] [Indexed: 05/25/2023]
Abstract
α-Hydroxyalkyl-hydroperoxides (α-HHs), from the addition of water to Criegee intermediates in the ozonolysis of olefins, are reactive components of organic aerosols. Assessing the fate of α-HHs in such media requires information on the rates and products of their reactions in aqueous organic matrixes. This information, however, is unavailable due to the lack of analytical techniques for the detection and identification of labile α-HHs. Here, we report the mass spectrometric detection (as Cl- adducts) of the α-HH produced in the ozonolysis of a C15 diolefin in water (W):acetonitrile (AN) mixtures of variable composition containing inert NaCl. α-HH decays into a gem-diol + H2O2 within τ1/e ≈ 52 min in 50% (v:v) water, but persists longer than a day in ≤10% water mixtures. The strong nonlinear dependence of τ1/e on solvent composition reveals that water content is a major factor controlling the fate of α-HHs in atmospheric particles. It also suggests that α-HH decomposes while embedded in WnANm clusters rather than randomly dissolved in molecularly homogeneous W:AN mixtures.
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Affiliation(s)
- Junting Qiu
- Graduate
School of Frontier Sciences, The University
of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Shinnosuke Ishizuka
- National
Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan
| | - Kenichi Tonokura
- Graduate
School of Frontier Sciences, The University
of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8563, Japan
| | - Agustín J. Colussi
- Ronald
and Maxine Linde Center for Global Environmental Science, California Institute of Technology, Pasadena, California 91125, United States
| | - Shinichi Enami
- National
Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan
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33
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The first example of detection of mesoscale particles in a solution of a low-molecular-mass compound in dichloromethane. Russ Chem Bull 2019. [DOI: 10.1007/s11172-019-2580-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Winkler R, Ré E, Arrachart G, Pellet-Rostaing S. Impact of Solvent Structuring in Water/ tert-Butanol Mixtures on the Assembly of Silica Nanoparticles to Aerogels. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7905-7915. [PMID: 31088054 DOI: 10.1021/acs.langmuir.9b00655] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Soft matter structuring is a useful tool for the preparation of well-structured inorganic materials. Here, we report a strategy using a structured solvent based on binary mixtures as a directing agent for silica nanoparticles in aerogel elaboration. Binary mixtures involving water/ethanol and water/ tert-butanol have been respectively chosen as representatives of unstructured and structured solvents. The water/alcohol/TEOS systems were effectively characterized as surfactant-free microemulsions. The enhanced solvent structuring, however, disappears upon the reaction with TEOS, and assembly is directed by solvent structuring found in the binary mixtures. For the first time, the influence of solvent composition on the sol-gel reaction was investigated with respect to the reaction rate and the structuring behavior thanks to dynamic light scattering (DLS), small- and wide-angle X-ray scattering (SWAXS), and transmission electron microscopy (TEM) experiments. The silica nanoparticles aggregate in a different manner depending on the solvent composition, which allows the change in the morphology, the degree of interconnection, and the surface area of the resulting material. Silica nanoparticles with a very high surface area of up to 2000 m2/g can be obtained by this approach.
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Affiliation(s)
- Robert Winkler
- ICSM, CEA, CNRS, ENSCM , Univ Montpellier , Marcoule , France
| | - Elisa Ré
- ICSM, CEA, CNRS, ENSCM , Univ Montpellier , Marcoule , France
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35
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Asano S, Tanaka HN, Imamura A, Ishida H, Ando H. p-tert-Butyl Groups Improve the Utility of Aromatic Protecting Groups in Carbohydrate Synthesis. Org Lett 2019; 21:4197-4200. [DOI: 10.1021/acs.orglett.9b01372] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sachi Asano
- The United Graduate School of Agricultural Science, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
- Department of Applied Bioorganic Chemistry, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Hide-Nori Tanaka
- Center for Highly Advanced Integration of Nano and Life Sciences (G-CHAIN), Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
- The United Graduate School of Agricultural Science, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Akihiro Imamura
- The United Graduate School of Agricultural Science, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
- Department of Applied Bioorganic Chemistry, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Hideharu Ishida
- Center for Highly Advanced Integration of Nano and Life Sciences (G-CHAIN), Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
- The United Graduate School of Agricultural Science, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
- Department of Applied Bioorganic Chemistry, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Hiromune Ando
- Center for Highly Advanced Integration of Nano and Life Sciences (G-CHAIN), Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
- The United Graduate School of Agricultural Science, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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36
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Zhang Q, Ran Q, Shu X, Yang Y, Yu C. Effect of counter-ions on the solution conformation and adsorption behaviors of comb-like polycarboxylates on calcium carbonate. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2018.1542313] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Qian Zhang
- State Key Laboratory of High Performance Civil Engineering Materials (HPCEM), Jiangsu Research Institute of Building Science, Nanjing, Jiangsu, China
- Jiangsu Sobute New Materials Co. Ltd, Nanjing, Jiangsu, China
| | - Qianping Ran
- State Key Laboratory of High Performance Civil Engineering Materials (HPCEM), Jiangsu Research Institute of Building Science, Nanjing, Jiangsu, China
- Jiangsu Sobute New Materials Co. Ltd, Nanjing, Jiangsu, China
| | - Xin Shu
- State Key Laboratory of High Performance Civil Engineering Materials (HPCEM), Jiangsu Research Institute of Building Science, Nanjing, Jiangsu, China
- Jiangsu Sobute New Materials Co. Ltd, Nanjing, Jiangsu, China
| | - Yong Yang
- State Key Laboratory of High Performance Civil Engineering Materials (HPCEM), Jiangsu Research Institute of Building Science, Nanjing, Jiangsu, China
- Jiangsu Sobute New Materials Co. Ltd, Nanjing, Jiangsu, China
| | - Cheng Yu
- State Key Laboratory of High Performance Civil Engineering Materials (HPCEM), Jiangsu Research Institute of Building Science, Nanjing, Jiangsu, China
- Jiangsu Sobute New Materials Co. Ltd, Nanjing, Jiangsu, China
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37
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Ryzhkina IS, Sergeeva SY, Murtazina LI, Akhmetzyanova LR, Kuznetsova TV, Knyazev IV, Petrov AM, Dokuchaeva IS, Konovalov AI. Features of self-organization and biological properties of solutions of citric and succinic acids in low concentrations. Russ Chem Bull 2019. [DOI: 10.1007/s11172-019-2389-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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Lagodzinskaya GV, Laptinskaya TV, Kazakov AI. Supramolecular structuring of aqueous solutions of strong acids: manifestations in light scattering, NMR, and oxidation kinetics. Does liquid have a drop-like nature? Russ Chem Bull 2019. [DOI: 10.1007/s11172-018-2358-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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39
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Jost U, Abronina PI, Zinin AI, Michalik D, Kragl U, Kondakov NN, Chizov AO, Torgov VI, Kononov LO. New approaches to analogs of α-linked galactosylceramides based on functionalized serinol. Russ Chem Bull 2019. [DOI: 10.1007/s11172-018-2373-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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40
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Enami S, Ishizuka S, Colussi AJ. Chemical signatures of surface microheterogeneity on liquid mixtures. J Chem Phys 2019; 150:024702. [PMID: 30646725 DOI: 10.1063/1.5055684] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Many chemical reactions in Nature, the laboratory, and chemical industry occur in solvent mixtures that bring together species of dissimilar solubilities. Solvent mixtures are visually homogeneous, but are not randomly mixed at the molecular scale. In the all-important binary water-hydrotrope mixtures, small-angle neutron and dynamic light scattering experiments reveal the existence of short-lived (<50 ps), short-ranged (∼1 nm) concentration fluctuations. The presence of hydrophobic solutes stabilizes and extends such fluctuations into persistent, mesoscopic (10-100 nm) inhomogeneities. While the existence of inhomogeneities is well established, their impacts on reactivity are not fully understood. Here, we search for chemical signatures of inhomogeneities on the surfaces of W:X mixtures (W = water; X = acetonitrile, tetrahydrofuran, or 1,4-dioxane) by studying the reactions of Criegee intermediates (CIs) generated in situ from O3(g) addition to a hydrophobic olefin (OL) solute. Once formed, CIs isomerize to functionalized carboxylic acids (FC) or add water to produce α-hydroxy-hydroperoxides (HH), as detected by surface-specific, online pneumatic ionization mass spectrometry. Since only the formation of HH requires the presence of water, the dependence of the R = HH/FC ratio on water molar fraction x w expresses the accessibility of water to CIs on the surfaces of mixtures. The finding that R increases quasi-exponentially with x w in all solvent mixtures is consistent with CIs being preferentially produced (from their OL hydrophobic precursor) in X-rich, long-lived OL:X m W n interfacial clusters, rather than randomly dispersed on W:X surfaces. R vs x w dependences therefore reflect the average ⟨m, n⟩ composition of OL:X m W n interfacial clusters, as weighted by cluster reorganization dynamics. Water in large, rigid clusters could be less accessible to CIs than in smaller but more flexible clusters of lower water content. Since mesoscale inhomogeneities are intrinsic to most solvent mixtures, these phenomena should be quite general.
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Affiliation(s)
- Shinichi Enami
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan
| | - Shinnosuke Ishizuka
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba 305-8506, Japan
| | - Agustín J Colussi
- Linde Center for Global Environmental Science, California Institute of Technology, Pasadena, California 91125, USA
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Lagodzinskaya GV, Laptinskaya TV, Kazakov AI. Supramolecular structuring of aqueous solutions of strong acids: manifestations in light scattering, NMR, and oxidation kinetics. Does liquid have a drop-like nature? 1. Nitric acid. Russ Chem Bull 2018. [DOI: 10.1007/s11172-018-2297-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Dhakal B, Crich D. Synthesis and Stereocontrolled Equatorially Selective Glycosylation Reactions of a Pseudaminic Acid Donor: Importance of the Side-Chain Conformation and Regioselective Reduction of Azide Protecting Groups. J Am Chem Soc 2018; 140:15008-15015. [PMID: 30351022 DOI: 10.1021/jacs.8b09654] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Pseudaminic acid is an amino deoxy sialic acid whose glycosides are essential components of many pathogenic Gram-negative bacterial cell walls including those from Pseudomonas aeruginosa, Vibrio cholerae, Campylobacter jejuni, Campylobacter coli, Vibrio vulnificus, and Pseudoalteromonas distincta. The study of pseudaminic acid glycosides is however hampered by poor availability from nature and the paucity of good synthetic methods and limited to no understanding of the factors controlling stereoselectivity. Conformational analysis of the side chains of various stereoisomeric sialic acids suggested that the side chain of pseudaminic acid would take up the most electron-withdrawing trans, gauche-conformation, as opposed to the gauche, gauche conformation of N-acetyl neuraminic acid and the gauche, trans-conformtion of 7- epi N-acetyl neuraminic acid, leading to the prediction of high equatorial selectivity. This prediction is borne out by the synthesis of a suitably protected pseudaminic acid donor from N-acetyl neuraminic acid in 20 steps and 5% overall yield and by the exquisite equatorial selectivity it displays in coupling reactions with typical glycosyl acceptors. The selectivity of the glycosylation reactions is further buttressed by the development and implementation of conditions for the regioselective release of the two amines from the corresponding azides, such as required for the preparation of the lipopolysaccharides. These findings open the way to the synthesis and study of pseudaminic acid-based bacterial lipopolysaccharides and, importantly in the broader context of glycosylation reactions in general, underline the significant role played by side-chain conformation in the control of reactivity and selectivity.
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Affiliation(s)
- Bibek Dhakal
- Department of Chemistry , Wayne State University , 5101 Cass Avenue , Detroit , Michigan 48202 , United States
| | - David Crich
- Department of Chemistry , Wayne State University , 5101 Cass Avenue , Detroit , Michigan 48202 , United States
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Nagornaya MO, Orlova AV, Stepanova EV, Zinin AI, Laptinskaya TV, Kononov LO. The use of the novel glycosyl acceptor and supramer analysis in the synthesis of sialyl-α(2-3)-galactose building block. Carbohydr Res 2018; 470:27-35. [PMID: 30343245 DOI: 10.1016/j.carres.2018.10.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Revised: 10/02/2018] [Accepted: 10/02/2018] [Indexed: 12/20/2022]
Abstract
A new glycosyl acceptor to be used in sialylation was designed as a 3-hydroxy derivative of 4-methoxyphenyl β-d-galactopyranoside with 2-O-acetyl group and O-4 and O-6 protected as benzylidene acetal. Two alternative syntheses of this compound were compared. Sialylation of 3-OH group of the glycosyl acceptor with O-chloroacetylated N-trifluoroacetylneuraminic acid phenyl thioglycoside (NIS, TfOH, MeCN, MS 3 Å, -40 °C) was studied in a wide concentration range (5-150 mmol L-1). The outcome of sialylation generally followed the predictions of supramer analysis of solutions of sialyl donor in MeCN, which was performed by polarimetry and static light scattering and revealed two concentration ranges differing in solution structure and the structures of supramers of glycosyl donor. The optimized conditions of sialylation (C = 50 mmol L-1) were used to synthesize protected Neu-α(2-3)-Gal disaccharide (78%, α:β = 13:1), which was then converted to sialyl-α(2-3)-galactose imidate building block useful for the synthesis of complex sialo-oligosaccharides.
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Affiliation(s)
- Marina O Nagornaya
- School of Advanced Manufacturing Technologies, National Research Tomsk Polytechnic University, Lenin Avenue 30, Tomsk, 634050, Russian Federation; N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky Prosp., 47, 119991, Moscow, Russian Federation
| | - Anna V Orlova
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky Prosp., 47, 119991, Moscow, Russian Federation
| | - Elena V Stepanova
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky Prosp., 47, 119991, Moscow, Russian Federation; Research School of Chemistry & Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Lenin Avenue 30, Tomsk, 634050, Russian Federation
| | - Alexander I Zinin
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky Prosp., 47, 119991, Moscow, Russian Federation
| | - Tatiana V Laptinskaya
- Faculty of Physics, M. V. Lomonosov Moscow State University, Leninskie Gory, 119992, Moscow, Russian Federation
| | - Leonid O Kononov
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky Prosp., 47, 119991, Moscow, Russian Federation.
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45
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Abronina PI, Malysheva NN, Litvinenko VV, Zinin AI, Kolotyrkina NG, Kononov LO. A Ring Contraction of 2,3-Di-O-Silylated Thiopyranosides To Give Thiofuranosides under Mildly Acidic Conditions. Org Lett 2018; 20:6051-6054. [DOI: 10.1021/acs.orglett.8b02424] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Polina I. Abronina
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky prosp., 47, Moscow 119991, Russian Federation
| | - Nelly N. Malysheva
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky prosp., 47, Moscow 119991, Russian Federation
| | - Veronika V. Litvinenko
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky prosp., 47, Moscow 119991, Russian Federation
| | - Alexander I. Zinin
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky prosp., 47, Moscow 119991, Russian Federation
| | - Natalya G. Kolotyrkina
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky prosp., 47, Moscow 119991, Russian Federation
| | - Leonid O. Kononov
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky prosp., 47, Moscow 119991, Russian Federation
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Adero PO, Amarasekara H, Wen P, Bohé L, Crich D. The Experimental Evidence in Support of Glycosylation Mechanisms at the S N1-S N2 Interface. Chem Rev 2018; 118:8242-8284. [PMID: 29846062 PMCID: PMC6135681 DOI: 10.1021/acs.chemrev.8b00083] [Citation(s) in RCA: 215] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A critical review of the state-of-the-art evidence in support of the mechanisms of glycosylation reactions is provided. Factors affecting the stability of putative oxocarbenium ions as intermediates at the SN1 end of the mechanistic continuum are first surveyed before the evidence, spectroscopic and indirect, for the existence of such species on the time scale of glycosylation reactions is presented. Current models for diastereoselectivity in nucleophilic attack on oxocarbenium ions are then described. Evidence in support of the intermediacy of activated covalent glycosyl donors is reviewed, before the influences of the structure of the nucleophile, of the solvent, of temperature, and of donor-acceptor hydrogen bonding on the mechanism of glycosylation reactions are surveyed. Studies on the kinetics of glycosylation reactions and the use of kinetic isotope effects for the determination of transition-state structure are presented, before computational models are finally surveyed. The review concludes with a critical appraisal of the state of the art.
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Affiliation(s)
- Philip Ouma Adero
- Department of Chemistry , Wayne State University , 5101 Cass Avenue , Detroit , Michigan 48202 , United States
| | - Harsha Amarasekara
- Department of Chemistry , Wayne State University , 5101 Cass Avenue , Detroit , Michigan 48202 , United States
| | - Peng Wen
- Department of Chemistry , Wayne State University , 5101 Cass Avenue , Detroit , Michigan 48202 , United States
| | - Luis Bohé
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301 , Université Paris-Sud Université Paris-Saclay , 1 avenue de la Terrasse , 91198 Gif-sur-Yvette , France
| | - David Crich
- Department of Chemistry , Wayne State University , 5101 Cass Avenue , Detroit , Michigan 48202 , United States
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47
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Disperse systems based on chloracetophos in the low concentration range: self-organization, physicochemical properties and influence on representatives of higher plants and hydrobionts. Russ Chem Bull 2018. [DOI: 10.1007/s11172-018-2139-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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48
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Kulagina TP, Smirnov LP, Andrianova ZS. Mathematical Simulation of Low-Frequency Mechanical Action on Bimolecular Reaction Kinetics in a Structured Liquid. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2018. [DOI: 10.1134/s1990793118040139] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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49
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Abronina PI, Zinin AI, Romashin DA, Tereshina VV, Chizhov AO, Kononov LO. Application of a Janus aglycon with dual function in benzyl-free synthesis of spacer-armed oligosaccharide fragments of polysaccharides from rhizobacterium Azospirillum brasilense sp7. Carbohydr Res 2018; 464:28-43. [PMID: 29803733 DOI: 10.1016/j.carres.2018.05.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 05/11/2018] [Accepted: 05/11/2018] [Indexed: 11/16/2022]
Abstract
Both protective and pre-spacer features of 4-(2-chloroethoxy)phenyl (CEP) aglycon, which belong to the class of Janus aglycons, were engaged in a benzyl-free synthesis of oligosaccharide fragments of polysaccharides from rhizobacterium Azospirillum brasilense sp7. Introduction of α-1,4-linked L-fucose residue was performed using 3,4-di-O-benzoyl-2-O-triisopropylsilyl-α-L-fucopyranosyl N-phenyltrifluoroacetimidate in excellent stereoselectivity and high yields. The obtained deprotected di-, tri- and tetrasaccharides contain 4-(2-azidoethoxy)phenyl (AEP) spacer aglycon, which allows straightforward preparation of neoglycoconjugates that will be used for the study of the role of lipopolysaccharide of rhizobacterium A. brasilense sp7 in plant-microbe symbiosis. The intermediate protected oligosaccharide building blocks with cleavable CEP/AEP aglycons have a strong potential for further application in the synthesis of more complex oligosaccharides.
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Affiliation(s)
- Polina I Abronina
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky prosp. 47, 119991, Moscow, Russian Federation.
| | - Alexander I Zinin
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky prosp. 47, 119991, Moscow, Russian Federation
| | - Denis A Romashin
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky prosp. 47, 119991, Moscow, Russian Federation
| | - Valeria V Tereshina
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky prosp. 47, 119991, Moscow, Russian Federation
| | - Alexander O Chizhov
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky prosp. 47, 119991, Moscow, Russian Federation
| | - Leonid O Kononov
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Leninsky prosp. 47, 119991, Moscow, Russian Federation.
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50
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Krickl S, Touraud D, Bauduin P, Zinn T, Kunz W. Enzyme activity of horseradish peroxidase in surfactant-free microemulsions. J Colloid Interface Sci 2018; 516:466-475. [DOI: 10.1016/j.jcis.2018.01.077] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 01/22/2018] [Accepted: 01/22/2018] [Indexed: 11/28/2022]
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