1
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Imperio D, Brentazzoli M, Valloni F, Minassi A, Panza L. Iodine-triphenylphosphine triggers an easy one-pot alpha stereoselective dehydrative glycosylation on hemiacetalic benzylated glycosyl donors. Carbohydr Res 2023; 533:108944. [PMID: 37729855 DOI: 10.1016/j.carres.2023.108944] [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: 08/22/2023] [Revised: 09/11/2023] [Accepted: 09/13/2023] [Indexed: 09/22/2023]
Abstract
The discovery of new glycosylation reactions is still a major challenge in carbohydrate chemistry. Traditional glycosylation reactions require the preparation of sugar donors with anomeric active or latent leaving groups. Dehydrative glycosylation is a fascinating alternative that enables the direct formation of the glycosidic bond from the hemiacetal, eliminating the need for (sometimes unstable) leaving groups, and allowing to reduce reaction, work-up, and purification times. Although some interesting methods of dehydrative glycosylation have been reported, in order to compete with conventional chemical glycosylation, a greater number of efficient and stereoselective methods need to be developed. Herein, a dehydrative procedure that uses a combination of iodine, triphenylphosphine, and a base (DMAP or imidazole) is described. This methodology allows for the preparation of sugar derivatives from commercially available 1-hydroxy glycosyl donors. The reaction takes place under mild conditions through the in situ-formation of an anomeric iodide intermediate, which, upon reaction with an alcohol, gives the corresponding glycosides up to quantitative yields and with high α-stereoselectivity.
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Affiliation(s)
- Daniela Imperio
- Department of Pharmaceutical Sciences, Universita del Piemonte Orientale, Largo Donegani 2, 28100, Novara, Italy
| | - Marco Brentazzoli
- Department of Pharmaceutical Sciences, Universita del Piemonte Orientale, Largo Donegani 2, 28100, Novara, Italy
| | - Filippo Valloni
- Department of Pharmaceutical Sciences, Universita del Piemonte Orientale, Largo Donegani 2, 28100, Novara, Italy
| | - Alberto Minassi
- Department of Pharmaceutical Sciences, Universita del Piemonte Orientale, Largo Donegani 2, 28100, Novara, Italy
| | - Luigi Panza
- Department of Pharmaceutical Sciences, Universita del Piemonte Orientale, Largo Donegani 2, 28100, Novara, Italy.
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2
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Luo T, Xu TT, Guo YF, Dong H. SnCl 4 Promoted Efficient Cleavage of Acetal/Ketal Groups with the Assistance of Water in CH 2Cl 2. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238258. [PMID: 36500346 PMCID: PMC9736348 DOI: 10.3390/molecules27238258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/23/2022] [Accepted: 11/24/2022] [Indexed: 11/29/2022]
Abstract
Acetalization and deacetalation are a pair of routine manipulations to protect and deprotect the 4- and 6-hydroxyl groups of glycosides in the synthesis of glycosyl building blocks. In this study, we found that treatment of SnCl4 with various carbohydrates containing acetal/ketal groups with the assistance of water in CH2Cl2 led to deacetalization/deketalization products in almost quantitative yields. In addition, for substrates containing both acetal/ketal and p-methoxylbenzyl groups, we also found that the p-methoxylbenzyl group was selectively cleaved by the use of a catalytic amount of SnCl4, while the acetal/ketal groups remained. Furthermore, based on this, 4,6-benzylidene glycosides can be conveniently converted to 4,6-OAc or 4-OH, 6-OAc glycosides.
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3
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Jiao J, Maisonneuve S, Xie J. Synthesis and Azobenzene Isomerization Investigation of Photoswitchable Glycomacrocycles. J Org Chem 2022; 87:8534-8543. [PMID: 35729754 DOI: 10.1021/acs.joc.2c00652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Macrocyclic glycoazobenzenes, as an emerging class of photoswitchable chiral macrocyclic compounds, have shown interesting properties since their discovery in 2017. We have recently employed the azobenzene-ester-linked glycosyl donor-acceptor pairs to study the influence of photoisomerization on intramolecular glycosylation. To continue the investigation on the stereoselectivity aspect of glycosylation and also to enlarge the diversity of photoswitchable glycomacrocycles, we have chosen azobenzene-triazole linkers in the present study and shown that the stereoselectivity of the glycosylation is dependent on the linker length, the configuration of the azobenzene template, as well as the reaction concentration. We have optimized the reaction conditions to prepare in good yields new glycomacrocycles, which displayed excellent photochromic properties. The influence of glycosylation reagents and acidity on the stability of the Z-azobenzene substrates and cyclic glycoazobenzenes has also been investigated, demonstrating that isomerization of macrocyclic azobenzene can be tuned by photo-, thermo-, and acid stimulus.
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Affiliation(s)
- Jinbiao Jiao
- ENS Paris-Saclay, CNRS, Photophysique et Photochimie Supramoléculaires et Macromoléculaires, Université Paris-Saclay, Gif-sur-Yvette 91190, France
| | - Stéphane Maisonneuve
- ENS Paris-Saclay, CNRS, Photophysique et Photochimie Supramoléculaires et Macromoléculaires, Université Paris-Saclay, Gif-sur-Yvette 91190, France
| | - Juan Xie
- ENS Paris-Saclay, CNRS, Photophysique et Photochimie Supramoléculaires et Macromoléculaires, Université Paris-Saclay, Gif-sur-Yvette 91190, France
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4
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Trinderup HH, Sandgaard TLP, Juul-Madsen L, Jensen HH. Anomeric Thioglycosides Give Different Anomeric Product Distributions under NIS/TfOH Activation. J Org Chem 2022; 87:4154-4167. [PMID: 35239337 DOI: 10.1021/acs.joc.1c03001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The reaction of a series of anomeric thioglycosides with various glycosyl acceptors and N-iodosuccinimide/catalytic triflic acid was investigated with respect to reactivity and anomeric selectivity. In general, β-configured donors were found to give a more β-selective reaction outcome compared to their α-configured counterparts. The relative reactivity of various thioglycosides was measured through competition experiments, and the following order was established: phenyl, tolyl, methyl, ethyl, isopropyl, and 1-adamantyl.
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Affiliation(s)
| | | | - Line Juul-Madsen
- Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
| | - Henrik H Jensen
- Department of Chemistry, Aarhus University, 8000 Aarhus C, Denmark
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5
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Trinderup HH, Andersen SM, Heuckendorff M, Jensen HH. How do Various Reaction Parameters Influence Anomeric Selectivity in Chemical Glycosylation with Thioglycosides and NIS/TfOH Activation? European J Org Chem 2021. [DOI: 10.1002/ejoc.202100260] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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6
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Tomita S, Tanaka M, Inoue M, Inaba K, Takahashi D, Toshima K. Diboron-Catalyzed Regio- and 1,2- cis-α-Stereoselective Glycosylation of trans-1,2-Diols. J Org Chem 2020; 85:16254-16262. [PMID: 33052679 DOI: 10.1021/acs.joc.0c02093] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Regio- and 1,2-cis-α-stereoselective glycosylations were investigated using 1,2-anhydroglucose donors and trans-1,2-diol sugar acceptors in the presence of a diboron catalyst. The reactions proceeded smoothly to provide the corresponding 1,2-cis-α-glycosides with consistently very high stereoselectivity and were regioselectivity controlled by the protecting groups of the acceptor. The present glycosylation method was applied successfully to the efficient synthesis of α-1,3-glucan pentasaccharide.
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Affiliation(s)
- Shunpei Tomita
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Masamichi Tanaka
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Michitaka Inoue
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Kazuki Inaba
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Daisuke Takahashi
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Kazunobu Toshima
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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7
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Ding Y, Vara Prasad CVNS, Wang B. Glycosylation on Unprotected or Partially Protected Acceptors. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901675] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Yili Ding
- Life Science Department; Foshan University; 528000 Foshan Guangdong China
| | | | - Bingyun Wang
- Life Science Department; Foshan University; 528000 Foshan Guangdong China
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8
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Imrich MR, Biehler LE, Maichle-Mössmer C, Ziegler T. Carbohydrate-Based Chiral Iodoarene Catalysts: A Survey through the Development of an Improved Catalyst Design. Molecules 2019; 24:molecules24213883. [PMID: 31661915 PMCID: PMC6864689 DOI: 10.3390/molecules24213883] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 10/24/2019] [Accepted: 10/24/2019] [Indexed: 11/16/2022] Open
Abstract
Iodoarene catalysts can be applied in versatile reactions, for instance in the construction of complex chiral molecules via dearomatization of simple aromatic compounds. Recently, we reported the synthesis of the first carbohydrate-based chiral iodoarene catalysts and their application in asymmetric catalysis. Here we describe the synthesis of some new and improved catalysts. An account on how we got to the improved catalyst design, as well as the X-ray structure of one of the carbohydrate-based iodoarenes, is given.
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Affiliation(s)
- Michael R Imrich
- Institute of Organic Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen, Germany.
| | - Linda E Biehler
- Institute of Organic Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen, Germany.
| | - Cäcilia Maichle-Mössmer
- Institute of Inorganic Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen, Germany.
| | - Thomas Ziegler
- Institute of Organic Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen, Germany.
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9
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Núñez-López G, Herrera-González A, Hernández L, Amaya-Delgado L, Sandoval G, Gschaedler A, Arrizon J, Remaud-Simeon M, Morel S. Fructosylation of phenolic compounds by levansucrase from Gluconacetobacter diazotrophicus. Enzyme Microb Technol 2019; 122:19-25. [DOI: 10.1016/j.enzmictec.2018.12.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 11/11/2018] [Accepted: 12/03/2018] [Indexed: 02/06/2023]
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10
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Bradshaw GA, Colgan AC, Allen NP, Pongener I, Boland MB, Ortin Y, McGarrigle EM. Stereoselective organocatalyzed glycosylations - thiouracil, thioureas and monothiophthalimide act as Brønsted acid catalysts at low loadings. Chem Sci 2019; 10:508-514. [PMID: 30713648 PMCID: PMC6334493 DOI: 10.1039/c8sc02788a] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 10/15/2018] [Indexed: 01/21/2023] Open
Abstract
Thiouracil catalyzes stereoselective glycosylations with galactals in loadings as low as 0.1 mol%. It is proposed that in these glycosylations thiouracil, monothiophthalimide, and the previously reported catalyst, Schreiner's thiourea, do not operate via a double H-bonding mechanism but rather by Brønsted acid/base catalysis. In addition to the synthesis of 2-deoxyglycosides and glycoconjugates, we report the first organocatalytic synthesis of 1,1'-linked trehalose-type sugars.
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Affiliation(s)
- G A Bradshaw
- Centre for Synthesis & Chemical Biology , UCD School of Chemistry , University College Dublin , Belfield , Dublin 4 , Ireland .
| | - A C Colgan
- Centre for Synthesis & Chemical Biology , UCD School of Chemistry , University College Dublin , Belfield , Dublin 4 , Ireland .
| | - N P Allen
- Centre for Synthesis & Chemical Biology , UCD School of Chemistry , University College Dublin , Belfield , Dublin 4 , Ireland .
| | - I Pongener
- Centre for Synthesis & Chemical Biology , UCD School of Chemistry , University College Dublin , Belfield , Dublin 4 , Ireland .
| | - M B Boland
- Centre for Synthesis & Chemical Biology , UCD School of Chemistry , University College Dublin , Belfield , Dublin 4 , Ireland .
| | - Y Ortin
- Centre for Synthesis & Chemical Biology , UCD School of Chemistry , University College Dublin , Belfield , Dublin 4 , Ireland .
| | - E M McGarrigle
- Centre for Synthesis & Chemical Biology , UCD School of Chemistry , University College Dublin , Belfield , Dublin 4 , Ireland .
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11
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Dimakos V, Taylor MS. Site-Selective Functionalization of Hydroxyl Groups in Carbohydrate Derivatives. Chem Rev 2018; 118:11457-11517. [DOI: 10.1021/acs.chemrev.8b00442] [Citation(s) in RCA: 148] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Victoria Dimakos
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - Mark S. Taylor
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
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12
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De P, McNeil M, Xia M, Boot CM, Hesser DC, Denef K, Rithner C, Sours T, Dobos KM, Hoft D, Chatterjee D. Structural determinants in a glucose-containing lipopolysaccharide from Mycobacterium tuberculosis critical for inducing a subset of protective T cells. J Biol Chem 2018; 293:9706-9717. [PMID: 29716995 PMCID: PMC6016469 DOI: 10.1074/jbc.ra118.002582] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 04/30/2018] [Indexed: 12/22/2022] Open
Abstract
Mycobacteria synthesize intracellular, 6-O-methylglucose–containing lipopolysaccharides (mGLPs) proposed to modulate bacterial fatty acid metabolism. Recently, it has been shown that Mycobacterium tuberculosis mGLP specifically induces a specific subset of protective γ9δ2 T cells. Mild base treatment, which removes all the base-labile groups, reduces the specific activity of mGLP required for induction of these T cells, suggesting that acylation of the saccharide moieties is required for γ9δ2 T-cell activation. On the basis of this premise, we used analytical LC/MS and NMR methods to identify and locate the acyl functions on the mGLP saccharides. We found that mGLP is heterogeneous with respect to acyl functions and contains acetyl, isobutyryl, succinyl, and octanoyl groups and that all acylations in mGLP, except for succinyl and octanoyl residues, reside on the glucosyl residues immediately following the terminal 3-O-methylglucose. Our analyses also indicated that the octanoyl residue resides at position 2 of an internal glucose toward the reducing end. LC/MS analysis of the residual product obtained by digesting the mGLP with pancreatic α-amylase revealed that the product is an oligosaccharide terminated by α-(1→4)–linked 6-O-methyl-d-glucosyl residues. This oligosaccharide retained none of the acyl groups, except for the octanoyl group, and was unable to induce protective γ9δ2 T cells. This observation confirmed that mGLP induces γ9δ2 T cells and indicated that the acylated glucosyl residues at the nonreducing terminus of mGLP are required for this activity.
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Affiliation(s)
- Prithwiraj De
- From the Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology and
| | - Michael McNeil
- From the Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology and
| | - Mei Xia
- Department of Internal Medicine, Saint Louis University, St. Louis, Missouri 63104
| | - Claudia M Boot
- Central Instrument Facility, Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523 and
| | - Danny C Hesser
- From the Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology and
| | - Karolien Denef
- Central Instrument Facility, Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523 and
| | - Christopher Rithner
- Central Instrument Facility, Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523 and
| | - Tyler Sours
- Central Instrument Facility, Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523 and
| | - Karen M Dobos
- From the Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology and
| | - Daniel Hoft
- Department of Internal Medicine, Saint Louis University, St. Louis, Missouri 63104
| | - Delphi Chatterjee
- From the Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology and
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13
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Łopatkiewicz G, Buda S, Mlynarski J. Application of the EF and GH Fragments to the Synthesis of Idraparinux. J Org Chem 2017; 82:12701-12714. [DOI: 10.1021/acs.joc.7b02497] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Grzegorz Łopatkiewicz
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Szymon Buda
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
| | - Jacek Mlynarski
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland
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14
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Yoneda Y, Hettegger H, Rosenau T, Kawada T. Additive Tendency of Substituent Effects onto Rate Constant of Acidic Hydrolysis of Methyl 4-O-Methyl-β-d-Glucopyranoside. ChemistrySelect 2016. [DOI: 10.1002/slct.201601125] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yuko Yoneda
- College of Agriculture; Academic Institute; Shizuoka University, Ohya 836, Suruga-ku; Shizuoka 422-8529 Japan
| | - Hubert Hettegger
- Division of Chemistry of Renewable Resources; Department of Chemistry; University of Natural Resources and Life Sciences, Vienna (BOKU); Konrad-Lorenz-Strasse 24 A-3430 Tulln Austria
| | - Thomas Rosenau
- Division of Chemistry of Renewable Resources; Department of Chemistry; University of Natural Resources and Life Sciences, Vienna (BOKU); Konrad-Lorenz-Strasse 24 A-3430 Tulln Austria
| | - Toshinari Kawada
- Graduate School of Life and Environmental Sciences; Kyoto Prefectural University, Nakaragi-cho 1-5, Shimogamo, Sakyo-ku; Kyoto 606-8522 Japan
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15
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16
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Łopatkiewicz G, Mlynarski J. Synthesis of l-Pyranosides by Hydroboration of Hex-5-enopyranosides Revisited. J Org Chem 2016; 81:7545-56. [PMID: 27504790 DOI: 10.1021/acs.joc.6b01243] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Extensive study of the diastereoselective synthesis of l-pyranosides utilizing hydroboration of substituted exo-glucals (5-enopyranosides) obtained from d-sugars is presented. On the basis of this study we present the empirical rules describing the reaction stereoselectivity and the correlation between the yield of the l-ido product and the size of protecting groups used. Application of these guidelines revealed that the hydroboration of methyl 2,3-O-methyl-6-deoxy-α-d-xylo-hex-5-enopyranoside resulted in exclusive formation of l-ido product with high yield. This method can be successfully applied to the synthesis of l-iduronic acid being an essential component of anticoagulant drugs with diastereoselectivity superior to previously published protocols.
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Affiliation(s)
| | - Jacek Mlynarski
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Krakow, Poland
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17
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Dhar S, La Clair JJ, León B, Hammons JC, Yu Z, Kashyap MK, Castro JE, Burkart MD. A Carbohydrate-Derived Splice Modulator. J Am Chem Soc 2016; 138:5063-8. [PMID: 27058259 DOI: 10.1021/jacs.5b13427] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Small-molecule splice modulators have recently been recognized for their clinical potential for diverse cancers. This, combined with their use as tools to study the importance of splice-regulated events and their association with disease, continues to fuel the discovery of new splice modulators. One of the key challenges found in the current class of materials arises from their instability, where rapid metabolic degradation can lead to off-target responses. We now describe the preparation of bench-stable splice modulators by adapting carbohydrate motifs as a central scaffold to provide rapid access to potent splice modulators.
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Affiliation(s)
- Sachin Dhar
- Department of Chemistry and Biochemistry, University of California-San Diego , 9500 Gilman Drive, La Jolla, California 92093-0358, United States
| | - James J La Clair
- Department of Chemistry and Biochemistry, University of California-San Diego , 9500 Gilman Drive, La Jolla, California 92093-0358, United States
| | - Brian León
- Department of Chemistry and Biochemistry, University of California-San Diego , 9500 Gilman Drive, La Jolla, California 92093-0358, United States
| | - Justin C Hammons
- Department of Chemistry and Biochemistry, University of California-San Diego , 9500 Gilman Drive, La Jolla, California 92093-0358, United States
| | - Zhe Yu
- Moores Cancer Center, University of California-San Diego , La Jolla, California 92093-0358, United States
| | - Manoj K Kashyap
- Moores Cancer Center, University of California-San Diego , La Jolla, California 92093-0358, United States
| | - Januario E Castro
- Moores Cancer Center, University of California-San Diego , La Jolla, California 92093-0358, United States
| | - Michael D Burkart
- Department of Chemistry and Biochemistry, University of California-San Diego , 9500 Gilman Drive, La Jolla, California 92093-0358, United States
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18
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Santschi N, Aiguabella N, Lewe V, Gilmour R. Delineating the physical organic profile of the 6-fluoro glycosyl donor. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2015.06.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Schuster HJ, Vijayakrishnan B, Davis BG. Chain-growth polyglycosylation: synthesis of linker-equipped mannosyl oligomers. Carbohydr Res 2015; 403:135-41. [DOI: 10.1016/j.carres.2014.06.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Revised: 06/16/2014] [Accepted: 06/19/2014] [Indexed: 11/29/2022]
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20
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Ling I, Hashim R, Sabah KJ. Sugar thiacrown-ether appended calix[4]arene as a selective chemosensor for Fe2+and Fe3+ions. RSC Adv 2015. [DOI: 10.1039/c5ra15448k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
A fluorescent chemosensor derived from sugar-thiacrown-ether appended calix[4]arene coupled with pyrene units was synthesized. Upon addition of Fe2+or Fe3+the fluorescence intensities are quenched indicating high selectivity for these metal ions.
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Affiliation(s)
- Irene Ling
- Department of Chemistry
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Rauzah Hashim
- Department of Chemistry
- University of Malaya
- Kuala Lumpur
- Malaysia
| | - Karem J. Sabah
- Department of Chemistry
- University of Malaya
- Kuala Lumpur
- Malaysia
- Chemistry Department
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21
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Li L, Franckowiak EA, Xu Y, McClain E, Du W. Efficient synthesis of β-(1,6)-linked oligosaccharides through microwave-assisted glycosylation. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26771] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lingyao Li
- Department of Chemistry, Science of Advanced Materials, Central Michigan University; Mount Pleasant Michigan 48859
| | - Emily A. Franckowiak
- Department of Chemistry, Science of Advanced Materials, Central Michigan University; Mount Pleasant Michigan 48859
| | - Yi Xu
- Department of Chemistry, Science of Advanced Materials, Central Michigan University; Mount Pleasant Michigan 48859
| | - Evan McClain
- Department of Chemistry, Science of Advanced Materials, Central Michigan University; Mount Pleasant Michigan 48859
| | - Wenjun Du
- Department of Chemistry, Science of Advanced Materials, Central Michigan University; Mount Pleasant Michigan 48859
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22
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Michigami K, Hayashi M. Enantioselective alkylation of aldehydes using dialkylzincs catalyzed by simple chiral diols derived from naturally occurring monosaccharides. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.03.090] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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23
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Wu X, Chu J, Wu B, Zhang S, He B. An efficient novel glycosylation of flavonoid by β-fructosidase resistant to hydrophilic organic solvents. BIORESOURCE TECHNOLOGY 2013; 129:659-662. [PMID: 23298773 DOI: 10.1016/j.biortech.2012.12.041] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Revised: 12/04/2012] [Accepted: 12/07/2012] [Indexed: 06/01/2023]
Abstract
An effective approach was successfully developed to isolate glycosidase with resistance of hydrophilic organic solvent, simultaneously with acceptor specificity of the target substrate. By this approach, an efficient solvent tolerant glycosidase producing bacterium Arthrobacter nicotianae XM6 was obtained. The β-fructosidase from strain XM6 shows high activity and stability in 10-25% DMSO and 10-20% methanol with 90-99% yields of puerarin glycosides. The addition of hydrophilic solvents not only greatly promoted the solubility of puerarin, but also regulated main products from multifructosyl puerarin to monofructosyl puerarin with increasing solvent concentration. Extraordinary highly efficient synthesis of puerarin glycosides (111.3 g/L of monofructosyl puerarin and 35.6 g/L of difructosyl puerarin) was attained in 25% DMSO solvent system from 110.4 g/L puerarin, which resulted a great facility for purification in large-scale process. The most novelty was that the β-fructosidase did not hydrolyze almost the newly formed glycosides using simply sucrose as donor.
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Affiliation(s)
- Xueming Wu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, 30 Puzhunan Road, 211816 Nanjing, China
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Wu X, Chu J, Liang J, He B. Efficient enzymatic synthesis of mangiferin glycosides in hydrophilic organic solvents. RSC Adv 2013. [DOI: 10.1039/c3ra42648c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Balmond EI, Coe DM, Galan MC, McGarrigle EM. α-Selective Organocatalytic Synthesis of 2-Deoxygalactosides. Angew Chem Int Ed Engl 2012; 51:9152-5. [DOI: 10.1002/anie.201204505] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Indexed: 12/14/2022]
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Balmond EI, Coe DM, Galan MC, McGarrigle EM. α-Selective Organocatalytic Synthesis of 2-Deoxygalactosides. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201204505] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Boettcher S, Matwiejuk M, Thiem J. Acceptor-influenced and donor-tuned base-promoted glycosylation. Beilstein J Org Chem 2012; 8:413-20. [PMID: 22509211 PMCID: PMC3326619 DOI: 10.3762/bjoc.8.46] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2012] [Accepted: 03/06/2012] [Indexed: 12/03/2022] Open
Abstract
Base-promoted glycosylation is a recently established stereoselective and regioselective approach for the assembly of di- and oligosaccharides by using partially protected acceptors and glycosyl halide donors. Initial studies were performed on partially methylated acceptor and donor moieties as a model system in order to analyze the key principles of oxyanion reactivities. In this work, extended studies on base-promoted glycosylation are presented by using benzyl protective groups in view of preparative applications. Emphases are placed on the influence of the acceptor anomeric configuration and donor reactivities.
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Affiliation(s)
- Stephan Boettcher
- Department of Chemistry, Faculty of Science, University of Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany
| | - Martin Matwiejuk
- Glycom A/S, c/o DTU, Building 201, Anker Engelunds Vej 1, DK-2800 Kgs. Lyngby, Denmark
| | - Joachim Thiem
- Department of Chemistry, Faculty of Science, University of Hamburg, Martin-Luther-King-Platz 6, 20146 Hamburg, Germany
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Matwiejuk M, Thiem J. Hydroxy Group Acidities of Partially Protected Glycopyranosides. European J Org Chem 2012. [DOI: 10.1002/ejoc.201101708] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Matwiejuk M, Thiem J. New Method for Regioselective Glycosylation Employing Saccharide Oxyanions. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100861] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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