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Wu J, Jia P, Kuniyil R, Liu P, Tang W. Dynamic Kinetic Stereoselective Glycosylation via Rh II and Chiral Phosphoric Acid-Cocatalyzed Carbenoid Insertion to the Anomeric OH Bond for the Synthesis of Glycoconjugates. Angew Chem Int Ed Engl 2023; 62:e202307144. [PMID: 37532672 PMCID: PMC10530496 DOI: 10.1002/anie.202307144] [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: 05/21/2023] [Revised: 07/31/2023] [Accepted: 08/02/2023] [Indexed: 08/04/2023]
Abstract
Chemical synthesis of glycoconjugates is essential for studying the biological functions of carbohydrates. We herein report an efficient approach for the stereoselective synthesis of challenging α-linked glycoconjugates via a RhII /chiral phosphoric acid (CPA)-cocatalyzed dynamic kinetic anomeric O-alkylation of sugar-derived lactols via carbenoid insertion to the anomeric OH bond. Notably, we observed excellent anomeric selectivity, excellent diastereoselectivity, broad substrate scope, and high efficiency for this glycosylation reaction by exploring various parameters of the cocatalytic system. DFT calculations suggested that the anomeric selectivity was mainly determined by steric interactions between the C2-carbon of the carbohydrate and the phenyl group of the metal carbenoid, while π/π interactions with the C2-OBn substituent on the carbohydrate substrate play a significant role for diastereoselectivity at the newly generated stereogenic center.
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Affiliation(s)
- Jicheng Wu
- Lachman Institute for Pharmaceutical Development, School of Pharmacy, University of Wisconsin-Madison, 777 Highland Avenue, Madison, WI 53705, United States
| | - Peijing Jia
- Lachman Institute for Pharmaceutical Development, School of Pharmacy, University of Wisconsin-Madison, 777 Highland Avenue, Madison, WI 53705, United States
| | - Rositha Kuniyil
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, United States
- Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA 15261, United States
| | - Weiping Tang
- Lachman Institute for Pharmaceutical Development, School of Pharmacy, University of Wisconsin-Madison, 777 Highland Avenue, Madison, WI 53705, United States
- Department of Chemistry, 1101 University Ave, University of Wisconsin-Madison, Madison, WI 53706, United States
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2
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Chemical and Synthetic Biology Approaches for Cancer Vaccine Development. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27206933. [PMID: 36296526 PMCID: PMC9611187 DOI: 10.3390/molecules27206933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/21/2022] [Accepted: 10/14/2022] [Indexed: 11/23/2022]
Abstract
Cancer vaccines have been considered promising therapeutic strategies and are often constructed from whole cells, attenuated pathogens, carbohydrates, peptides, nucleic acids, etc. However, the use of whole organisms or pathogens can elicit unwanted immune responses arising from unforeseen reactions to the vaccine components. On the other hand, synthetic vaccines, which contain antigens that are conjugated, often with carrier proteins, can overcome these issues. Therefore, in this review we have highlighted the synthetic approaches and discussed several bioconjugation strategies for developing antigen-based cancer vaccines. In addition, the major synthetic biology approaches that were used to develop genetically modified cancer vaccines and their progress in clinical research are summarized here. Furthermore, to boost the immune responses of any vaccines, the addition of suitable adjuvants and a proper delivery system are essential. Hence, this review also mentions the synthesis of adjuvants and utilization of biomaterial scaffolds, which may facilitate the design of future cancer vaccines.
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3
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Mukherjee MM, Ghosh R, Hanover JA. Recent Advances in Stereoselective Chemical O-Glycosylation Reactions. Front Mol Biosci 2022; 9:896187. [PMID: 35775080 PMCID: PMC9237389 DOI: 10.3389/fmolb.2022.896187] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 04/21/2022] [Indexed: 12/26/2022] Open
Abstract
Carbohydrates involving glycoconjugates play a pivotal role in many life processes. Better understanding toward glycobiological events including the structure–function relationship of these biomolecules and for diagnostic and therapeutic purposes including tailor-made vaccine development and synthesis of structurally well-defined oligosaccharides (OS) become important. Efficient chemical glycosylation in high yield and stereoselectivity is however challenging and depends on the fine tuning of a protection profile to get matching glycosyl donor–acceptor reactivity along with proper use of other important external factors like catalyst, solvent, temperature, activator, and additive. So far, many glycosylation methods have been reported including several reviews also. In the present review, we will concentrate our discussion on the recent trend on α- and β-selective glycosylation reactions reported during the past decade.
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Affiliation(s)
- Mana Mohan Mukherjee
- Laboratory of Cell and Molecular Biology, NIDDK, National Institutes of Health, Bethesda, MD, United States
| | - Rina Ghosh
- Department of Chemistry, Jadavpur University, Kolkata, India
- *Correspondence: John A. Hanover, ; Rina Ghosh,
| | - John A. Hanover
- Laboratory of Cell and Molecular Biology, NIDDK, National Institutes of Health, Bethesda, MD, United States
- *Correspondence: John A. Hanover, ; Rina Ghosh,
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4
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Stereoselective gold(I)-catalyzed approach to the synthesis of complex α-glycosyl phosphosaccharides. Nat Commun 2022; 13:421. [PMID: 35058448 PMCID: PMC8776814 DOI: 10.1038/s41467-022-28025-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 12/10/2021] [Indexed: 11/09/2022] Open
Abstract
AbstractGlycosyl phosphosaccharides represent a large and important family of complex glycans. Due to the distinct nature of these complex molecules, efficient approaches to access glycosyl phosphosaccharides are still in great demand. Here, we disclose a highly efficient and stereoselective approach to the synthesis of biologically important and complex α-glycosyl phosphosaccharides, employing direct gold(I)-catalyzed glycosylation of the weakly nucleophilic phosphoric acid acceptors. In this work, the broad substrate scope is demonstrated with more than 45 examples, including glucose, xylose, glucuronate, galactose, mannose, rhamnose, fucose, 2-N3-2-deoxymannose, 2-N3-2-deoxyglucose, 2-N3-2-deoxygalactose and unnatural carbohydrates. Here, we show the glycosyl phosphotriester prepared herein was successfully applied to the one-pot synthesis of a phosphosaccharide from Leishmania donovani, and an effective preparation of a trisaccharide diphosphate of phosphosaccharide fragments from Hansenula capsulate via iterative elongation strategy is realized.
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5
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Xiong T, Xie R, Huang C, Lan X, Huang N, Yao H. Recent advances in the synthesis of thiosugars using glycal donors. J Carbohydr Chem 2022. [DOI: 10.1080/07328303.2022.2027433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Tao Xiong
- Hubei Key Laboratory of Natural Products Research and Development, Key Laboratory of Functional Yeast (China National Light Industry), College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang, P. R. China
| | - Rui Xie
- Hubei Key Laboratory of Natural Products Research and Development, Key Laboratory of Functional Yeast (China National Light Industry), College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang, P. R. China
| | - Cai Huang
- Hubei Key Laboratory of Natural Products Research and Development, Key Laboratory of Functional Yeast (China National Light Industry), College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang, P. R. China
| | - Xin Lan
- Hubei Key Laboratory of Natural Products Research and Development, Key Laboratory of Functional Yeast (China National Light Industry), College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang, P. R. China
| | - Nianyu Huang
- Hubei Key Laboratory of Natural Products Research and Development, Key Laboratory of Functional Yeast (China National Light Industry), College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang, P. R. China
| | - Hui Yao
- Hubei Key Laboratory of Natural Products Research and Development, Key Laboratory of Functional Yeast (China National Light Industry), College of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang, P. R. China
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6
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Hénault J, Quellier P, Mock-Joubert M, Le Narvor C, Alix A, Bonnaffé D. Regioselective Reductive Opening of Benzylidene Acetals with Dichlorophenylborane/Triethylsilane: Previously Unreported Side Reactions and How to Prevent Them. J Org Chem 2022; 87:963-973. [PMID: 35015527 DOI: 10.1021/acs.joc.1c02141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Arylidene acetals are widely used protecting groups, because of not only the high regioselectivity of their introduction but also the possibility of performing further regioselective reductive opening in the presence of a hydride donor and an acid catalyst. In this context, the Et3SiH/PhBCl2 system presents several advantages: silanes are efficient, environmentally benign, and user-friendly hydride donors, while PhBCl2 opens the way to unique regioselectivity with regard to all other Brønsted or Lewis acids used with silanes. This system has been extensively used by several groups, and we have demonstrated its high regioselectivity in the reductive opening of 4,6- and 2,4-O-p-methoxybenzylidene moieties in protected disaccharides. Surprisingly, its use on 4,6-O-benzylidene-containing substrates 1 and 2 led to unreproducible yields due to the unexpected formation of several side products. Their characterizations allowed us to identify different pitfalls potentially affecting the outcome of reductive opening of arylidenes with the Et3SiH/PhBCl2 reagent system: alkene hydroboration, azide reduction, and/or Lewis acid-promoted cleavage of the arylidene. With this knowledge, we optimized reproducible and high-yielding reaction conditions that secure and extend the scope of the Et3SiH/PhBCl2 system as a reagent for the regioselective opening of arylidenes in complex and multifunctional molecules.
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Affiliation(s)
- Jérôme Hénault
- Université Paris-Saclay, CNRS, Institut de chimie moléculaire et des matériaux d'Orsay, 91405 Orsay, France
| | - Pauline Quellier
- Université Paris-Saclay, CNRS, Institut de chimie moléculaire et des matériaux d'Orsay, 91405 Orsay, France
| | - Maxime Mock-Joubert
- Université Paris-Saclay, CNRS, Institut de chimie moléculaire et des matériaux d'Orsay, 91405 Orsay, France
| | - Christine Le Narvor
- Université Paris-Saclay, CNRS, Institut de chimie moléculaire et des matériaux d'Orsay, 91405 Orsay, France
| | - Aurélien Alix
- Université Paris-Saclay, CNRS, Institut de chimie moléculaire et des matériaux d'Orsay, 91405 Orsay, France
| | - David Bonnaffé
- Université Paris-Saclay, CNRS, Institut de chimie moléculaire et des matériaux d'Orsay, 91405 Orsay, France
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7
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Das A, Jayaraman N. Carbon tetrachloride-free allylic halogenation-mediated glycosylations of allyl glycosides. Org Biomol Chem 2021; 19:9318-9325. [PMID: 34664608 DOI: 10.1039/d1ob01298c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The allylic bromination of allyl glycosides is conducted using NBS/AIBN reagents in (EtO)2CO and PhCF3 solutions, without using CCl4 as a solvent. The activated mixed halo-allyl glycosides led to glycosylations, mediated by a triflate, in a latent-active manner, with the allyl glycosides acting as donors and acceptors. Systematic glycosylation studies are performed with different triflate promoters, non-glycosyl acceptors and various allyl glycosyl donors. One-pot allylic halogenations and subsequent glycosylations are developed in PhCF3 solutions. This newer glycosylation method is utilized to obtain xylo-pyranoside di- and trisaccharides.
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Affiliation(s)
- Anupama Das
- Department of Chemistry, Indian Institute of Science, Bangalore-560012, India.
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8
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Das A, Jayaraman N. Aglycon reactivity as a guiding principle in latent-active approach to chemical glycosylations. Carbohydr Res 2021; 508:108404. [PMID: 34352649 DOI: 10.1016/j.carres.2021.108404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 07/07/2021] [Accepted: 07/19/2021] [Indexed: 12/22/2022]
Abstract
Chemical glycosylations critically depend on the activation of a glycosyl donor and the reaction of this activated donor intermediate with an acceptor alcohol. Whereas many strategies are developed for the activation of an anomeric aglycon substituent, the latent-active method of glycosylation is based specifically on tuning the reactivity of the aglycon substituent of a glycosyl donor. Several novel methods have emerged to install reactive aglycon moiety in a glycosyl donor and fine-tuning the reactivity of the moiety. Remote functionalizations of the aglycon plays a key role in the reactivity tuning. Activation of a remote functionality enables an otherwise latent aglycon to an active moiety, suitable as a glycosyl donor. The latent-active approach provides an advantage to avoid the conversion of the aglycon to another donor prior to a glycosylation, in addition to advancing the contemporary glycosylations with alternate insights. The review analyzes the methodologies that consolidate the latent-active approach to chemical glycosylations.
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Affiliation(s)
- Anupama Das
- Department of Organic Chemistry, Indian Institute of Science, Bangalore, 560 012, India
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9
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Zhang Y, He H, Chen Z, Huang Y, Xiang G, Li P, Yang X, Lu G, Xiao G. Merging Reagent Modulation and Remote Anchimeric Assistance for Glycosylation: Highly Stereoselective Synthesis of α‐Glycans up to a 30‐mer. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103826] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Yunqin Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany University of Chinese Academy of Sciences Chinese Academy of Sciences 132 Lanhei Road Kunming 650201 China
| | - Haiqing He
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany University of Chinese Academy of Sciences Chinese Academy of Sciences 132 Lanhei Road Kunming 650201 China
| | - Zixi Chen
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany University of Chinese Academy of Sciences Chinese Academy of Sciences 132 Lanhei Road Kunming 650201 China
| | - Yingying Huang
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany University of Chinese Academy of Sciences Chinese Academy of Sciences 132 Lanhei Road Kunming 650201 China
| | - Guisheng Xiang
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany University of Chinese Academy of Sciences Chinese Academy of Sciences 132 Lanhei Road Kunming 650201 China
| | - Penghua Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany University of Chinese Academy of Sciences Chinese Academy of Sciences 132 Lanhei Road Kunming 650201 China
| | - Xingkuan Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany University of Chinese Academy of Sciences Chinese Academy of Sciences 132 Lanhei Road Kunming 650201 China
| | - Gang Lu
- Key Laboratory of Colloid and Interface Chemistry Ministry of Education School of Chemistry and Chemical Engineering State Key Laboratory of Crystal Materials Shandong University Jinan Shandong 250100 China
| | - Guozhi Xiao
- State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany University of Chinese Academy of Sciences Chinese Academy of Sciences 132 Lanhei Road Kunming 650201 China
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10
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Zhang Y, He H, Chen Z, Huang Y, Xiang G, Li P, Yang X, Lu G, Xiao G. Merging Reagent Modulation and Remote Anchimeric Assistance for Glycosylation: Highly Stereoselective Synthesis of α-Glycans up to a 30-mer. Angew Chem Int Ed Engl 2021; 60:12597-12606. [PMID: 33763930 DOI: 10.1002/anie.202103826] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Indexed: 12/12/2022]
Abstract
The efficient synthesis of long, branched, and complex carbohydrates containing multiple 1,2-cis glycosidic linkages is a long-standing challenge. Here, we report a merging reagent modulation and 6-O-levulinoyl remote anchimeric assistance glycosylation strategy, which is successfully applied to the first highly stereoselective synthesis of the branched Dendrobium Huoshanense glycans and the linear Longan glycans containing up to 30 contiguous 1,2-cis glucosidic bonds. DFT calculations shed light on the origin of the much higher stereoselectivities of 1,2-cis glucosylation with 6-O-levulinoyl group than 6-O-acetyl or 6-O-benzoyl groups. Orthogonal one-pot glycosylation strategy based on glycosyl ortho-alkynylbenzoates and ortho-(1-phenylvinyl)benzoates has been demonstrated in the efficient synthesis of complex glycans, precluding such issues as aglycon transfer inherent to orthogonal one-pot synthesis based on thioglycosides.
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Affiliation(s)
- Yunqin Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China
| | - Haiqing He
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China
| | - Zixi Chen
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China
| | - Yingying Huang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China
| | - Guisheng Xiang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China
| | - Penghua Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China
| | - Xingkuan Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China
| | - Gang Lu
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong, 250100, China
| | - Guozhi Xiao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 132 Lanhei Road, Kunming, 650201, China
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11
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Tokatly AI, Vinnitskiy DZ, Ustuzhanina NE, Nifantiev NE. Protecting Groups as a Factor of Stereocontrol in Glycosylation Reactions. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2021. [DOI: 10.1134/s1068162021010258] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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12
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Zeng C, Sun B, Cao X, Zhu H, Oluwadahunsi OM, Liu D, Zhu H, Zhang J, Zhang Q, Zhang G, Gibbons CA, Liu Y, Zhou J, Wang PG. Chemical Synthesis of Homogeneous Human E-Cadherin N-Linked Glycopeptides: Stereoselective Convergent Glycosylation and Chemoselective Solid-Phase Aspartylation. Org Lett 2020; 22:8349-8353. [PMID: 33045166 DOI: 10.1021/acs.orglett.0c02971] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We report herein an efficient chemical synthesis of homogeneous human E-cadherin N-linked glycopeptides consisting of a heptapeptide sequence adjacent to the Asn-633 N-glycosylation site with representative N-glycan structures, including a conserved trisaccharide, a core-fucosylated tetrasaccharide, and a complex-type biantennary octasaccharide. The key steps are a chemoselective on-resin aspartylation using a pseudoproline-containing peptide and stereoselective glycosylation using glycosyl fluororide as a donor. This synthetic strategy demonstrates potential utility in accessing a wide range of homogeneous N-linked glycopeptides for the examination of their biological function.
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Affiliation(s)
- Chen Zeng
- School of Medicine, Southern University of Science and Technology, Shenzhen 518055, China
| | - Bin Sun
- School of Medicine, Southern University of Science and Technology, Shenzhen 518055, China
| | - Xuefeng Cao
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Hailiang Zhu
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | | | - Ding Liu
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - He Zhu
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Jiabin Zhang
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Qing Zhang
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Gaolan Zhang
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | | | - Yunpeng Liu
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
| | - Jun Zhou
- Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States.,R&D Headquarters, WuXi AppTec, Shanghai 200131, China
| | - Peng George Wang
- School of Medicine, Southern University of Science and Technology, Shenzhen 518055, China.,Department of Chemistry, Georgia State University, Atlanta, Georgia 30303, United States
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13
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Romeo JR, McDermott L, Bennett CS. Reagent-Controlled α-Selective Dehydrative Glycosylation of 2,6-Dideoxy Sugars: Construction of the Arugomycin Tetrasaccharide. Org Lett 2020; 22:3649-3654. [PMID: 32281384 PMCID: PMC7239334 DOI: 10.1021/acs.orglett.0c01153] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The first synthesis of the tetrasaccharide fragment of the anthracycline natural product Arugomycin is described. A reagent controlled dehydrative glycosylation method involving cyclopropenium activation was utilized to synthesize the α-linkages with complete anomeric selectivity. The synthesis was completed in 20 total steps, and in 2.5% overall yield with a longest linear sequence of 15 steps.
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Affiliation(s)
- Joseph R Romeo
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - Luca McDermott
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
| | - Clay S Bennett
- Department of Chemistry, Tufts University, Medford, Massachusetts 02155, United States
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14
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Xu K, Man Q, Zhang Y, Guo J, Liu Y, Fu Z, Zhu Y, Li Y, Zheng M, Ding N. Investigation of the remote acyl group participation in glycosylation from conformational perspectives by using trichloroacetimidate as the acetyl surrogate. Org Chem Front 2020. [DOI: 10.1039/d0qo00363h] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The remote acyl group participation in glycosylation was studied by using trichloroacetimidate as the acetyl surrogate. The bridging participation intermediates were systematically trapped, and DFT calculations were applied to explain the results.
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15
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Singh B, Kumar S, Maity J, Roy I, Prasad AK. Bamford-Stevens reaction assisted synthesis of styrene C-glycosides. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1606921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Balram Singh
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Sandeep Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Jyotirmoy Maity
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Indrajit Roy
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Ashok K. Prasad
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
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Pal R, Das A, Jayaraman N. One-pot oligosaccharide synthesis: latent-active method of glycosylations and radical halogenation activation of allyl glycosides. PURE APPL CHEM 2019. [DOI: 10.1515/pac-2019-0306] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Chemical glycosylations occupy a central importance to synthesize tailor-made oligo- and polysaccharides of functional importance. Generation of the oxocarbenium ion or the glycosyl cation is the method of choice in order to form the glycosidic bond interconnecting a glycosyl moiety with a glycosyl/aglycosyl moiety. A number of elegant methods have been devised that allow the glycosyl cation formation in a fairly stream-lined manner to a large extent. The latent-active method provides a powerful approach in the protecting group controlled glycosylations. In this context, allyl glycosides have been developed to meet the requirement of latent-active reactivities under appropriate glycosylation conditions. Radical halogenation provides a newer route of activation of allyl glycosides to an activated allylic glycoside. Such an allylic halide activation subjects the glycoside reactive under acid catalysis, leading to the conversion to a glycosyl cation and subsequent glycosylation with a number of acceptors. The complete anomeric selectivity favoring the 1,2-trans-anomeric glycosides points to the possibility of a preferred conformation of the glycosyl cation. This article discusses about advancements in the selectivity of glycosylations, followed by delineating the allylic halogenation of allyl glycoside as a glycosylation method and demonstrates synthesis of a repertoire of di- and trisaccharides, including xylosides, with varied protecting groups.
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Affiliation(s)
- Rita Pal
- Department of Organic Chemistry , Indian Institute of Science , Bangalore 560012 , India
| | - Anupama Das
- Department of Organic Chemistry , Indian Institute of Science , Bangalore 560012 , India
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Moons SJ, Mensink RA, Bruekers JPJ, Vercammen MLA, Jansen LM, Boltje TJ. α-Selective Glycosylation with β-Glycosyl Sulfonium Ions Prepared via Intramolecular Alkylation. J Org Chem 2019; 84:4486-4500. [PMID: 30808170 PMCID: PMC6454400 DOI: 10.1021/acs.joc.9b00022] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
![]()
Stereoselective glycosylation remains
the main challenge in the
chemical synthesis of oligosaccharides. Herein we report a simple
method to convert thioglycosides into β-sulfonium ions via an
intramolecular alkylation reaction, leading to highly α-selective
glycosylations for a variety of glycosyl acceptors. The influence
of the thioglycoside substituent and the protecting group pattern
on the glycosyl donor was investigated and showed a clear correlation
with the observed stereoselectivity.
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Affiliation(s)
- Sam J Moons
- Radboud University , Institute for Molecules and Materials , Heyendaalseweg 135 , Nijmegen 6525 AJ , The Netherlands
| | - Rens A Mensink
- Radboud University , Institute for Molecules and Materials , Heyendaalseweg 135 , Nijmegen 6525 AJ , The Netherlands
| | - Jeroen P J Bruekers
- Radboud University , Institute for Molecules and Materials , Heyendaalseweg 135 , Nijmegen 6525 AJ , The Netherlands
| | - Maurits L A Vercammen
- Radboud University , Institute for Molecules and Materials , Heyendaalseweg 135 , Nijmegen 6525 AJ , The Netherlands
| | - Laura M Jansen
- Radboud University , Institute for Molecules and Materials , Heyendaalseweg 135 , Nijmegen 6525 AJ , The Netherlands
| | - Thomas J Boltje
- Radboud University , Institute for Molecules and Materials , Heyendaalseweg 135 , Nijmegen 6525 AJ , The Netherlands
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18
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Abstract
The translation of biological glycosylation in humans to the clinical applications involves systematic studies using homogeneous samples of oligosaccharides and glycoconjugates, which could be accessed by chemical, enzymatic or other biological methods. However, the structural complexity and wide-range variations of glycans and their conjugates represent a major challenge in the synthesis of this class of biomolecules. To help navigate within many methods of oligosaccharide synthesis, this Perspective offers a critical assessment of the most promising synthetic strategies with an eye on the therapeutically relevant targets.
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Affiliation(s)
- Larissa Krasnova
- Department of Chemistry , The Scripps Research Institute , 10550 N. Torrey Pines Road , La Jolla , California 92037 , United States
| | - Chi-Huey Wong
- Department of Chemistry , The Scripps Research Institute , 10550 N. Torrey Pines Road , La Jolla , California 92037 , United States.,Genomics Research Center, Academia Sinica , Taipei 115 , Taiwan
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19
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Zhang Y, Zhou S, Wang X, Zhang H, Guo Z, Gao J. A new method for α-specific glucosylation and its application to the one-pot synthesis of a branched α-glucan. Org Chem Front 2019. [DOI: 10.1039/c8qo01177j] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We have developed a new and highly efficient α-specific glucosylation method based on the synergistic α-directing effects of a TolSCl/AgOTf promoter system and the steric β-shielding or the remote participation of protecting groups at the donor 6-O-position.
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Affiliation(s)
- Yanxin Zhang
- National Glycoengineering Research Center
- Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology
- Shandong University
- Qingdao
- China
| | - Shihao Zhou
- National Glycoengineering Research Center
- Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology
- Shandong University
- Qingdao
- China
| | - Xiaohan Wang
- National Glycoengineering Research Center
- Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology
- Shandong University
- Qingdao
- China
| | - Han Zhang
- National Glycoengineering Research Center
- Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology
- Shandong University
- Qingdao
- China
| | - Zhongwu Guo
- National Glycoengineering Research Center
- Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology
- Shandong University
- Qingdao
- China
| | - Jian Gao
- National Glycoengineering Research Center
- Shandong Provincial Key Laboratory of Carbohydrate Chemistry and Glycobiology
- Shandong University
- Qingdao
- China
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20
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Jana M, Bennett CS. Synthesis of the Non-Reducing Hexasaccharide Fragment of Saccharomicin B. Org Lett 2018; 20:7598-7602. [PMID: 30427691 DOI: 10.1021/acs.orglett.8b03333] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A synthesis of the nonreducing end hexasaccharide of saccharomicin B, α-l-Eva-(1→4)-α-l-Eva-(1→4)-α-l-Dig-(1→4)-α-l-Eva-(1→4)-α-l-Dig-(1→4)-β-d-Fuc, has been developed. Selective glycosylations of l-digitoxose (l-Dig) using AgPF6/TTBP-mediated thioether activation and l-4-e pi-vancosamine (l-Eva) using Tf2O/DTBMP-mediated sulfoxide activation produced the hexasaccharide as a single diastereomer in very good yield. This hexasaccharide is properly functionalized to serve as a glycosyl donor for the total synthesis of saccharomicin B.
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Affiliation(s)
- Manas Jana
- Department of Chemistry , Tufts University , 62 Talbot Avenue , Medford , Massachusetts 02155 , United States
| | - Clay S Bennett
- Department of Chemistry , Tufts University , 62 Talbot Avenue , Medford , Massachusetts 02155 , United States
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21
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Panza M, Pistorio SG, Stine KJ, Demchenko AV. Automated Chemical Oligosaccharide Synthesis: Novel Approach to Traditional Challenges. Chem Rev 2018; 118:8105-8150. [PMID: 29953217 PMCID: PMC6522228 DOI: 10.1021/acs.chemrev.8b00051] [Citation(s) in RCA: 213] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Advances in carbohydrate chemistry have certainly made common oligosaccharides much more accessible. However, many current methods still rely heavily upon specialized knowledge of carbohydrate chemistry. The application of automated technologies to chemical and life science applications such as genomics and proteomics represents a vibrant field. These automated technologies also present opportunities for their application to organic synthesis, including that of the synthesis of oligosaccharides. However, application of automated methods to the synthesis of carbohydrates is an underdeveloped area as compared to other classes of biomolecules. The overarching goal of this review article is to present the advances that have been made at the interface of carbohydrate chemistry and automated technology.
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Affiliation(s)
- Matteo Panza
- Department of Chemistry and Biochemistry, University of Missouri–St. Louis, One University Boulevard, St. Louis, Missouri 63121, United States
| | - Salvatore G. Pistorio
- Department of Chemistry and Biochemistry, University of Missouri–St. Louis, One University Boulevard, St. Louis, Missouri 63121, United States
| | - Keith J. Stine
- Department of Chemistry and Biochemistry, University of Missouri–St. Louis, One University Boulevard, St. Louis, Missouri 63121, United States
| | - Alexei V. Demchenko
- Department of Chemistry and Biochemistry, University of Missouri–St. Louis, One University Boulevard, St. Louis, Missouri 63121, United States
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22
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Zeng J, Liu Y, Chen W, Zhao X, Meng L, Wan Q. Glycosyl Sulfoxides in Glycosylation Reactions. Top Curr Chem (Cham) 2018; 376:27. [DOI: 10.1007/s41061-018-0205-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 05/31/2018] [Indexed: 01/01/2023]
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23
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Wang L, Overkleeft HS, van der Marel GA, Codée JDC. Reagent Controlled Stereoselective Synthesis of α-Glucans. J Am Chem Soc 2018; 140:4632-4638. [PMID: 29553729 PMCID: PMC5890317 DOI: 10.1021/jacs.8b00669] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Indexed: 11/29/2022]
Abstract
The development of a general glycosylation method that allows for the stereoselective construction of glycosidic linkages is a tremendous challenge. Because of the differences in steric and electronic properties of the building blocks used, the outcome of a glycosylation reaction can vary greatly when switching form one glycosyl donor-acceptor pair to another. We here report a strategy to install cis-glucosidic linkages in a fully stereoselective fashion that is under direct control of the reagents used to activate a single type of donor building block. The activating reagents are tuned to the intrinsic reactivity of the acceptor alcohol to match the reactivity of the glycosylating agent with the reactivity of the incoming nucleophile. A protecting group strategy is introduced that is based on the sole use of benzyl-ether type protecting groups to circumvent changes in reactivity as a result of the protecting groups. For the stereoselective construction of the α-glucosyl linkages to a secondary alcohol, a per-benzylated glusosyl imidate donor is activated with a combination of trimethylsilyltriflate and DMF, while activation of the same imidate donor with trimethylsilyl iodide in the presence of triphenylphosphine oxide allows for the stereoselective cis-glucosylation of primary alcohols. The effectiveness of the strategy is illustrated in the modular synthesis of a Mycobacterium tuberculosis nonasaccharide, composed of an α-(1-4)-oligoglucose backbone bearing different α-glucosyl branches.
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Affiliation(s)
- Liming Wang
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Herman S. Overkleeft
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | | | - Jeroen D. C. Codée
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
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24
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Wang HY, Blaszczyk SA, Xiao G, Tang W. Chiral reagents in glycosylation and modification of carbohydrates. Chem Soc Rev 2018; 47:681-701. [PMID: 29206256 DOI: 10.1039/c7cs00432j] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Carbohydrates play a significant role in numerous biological events, and the chemical synthesis of carbohydrates is vital for further studies to understand their various biological functions. Due to the structural complexity of carbohydrates, the stereoselective formation of glycosidic linkages and the site-selective modification of hydroxyl groups are very challenging and at the same time extremely important. In recent years, the rapid development of chiral reagents including both chiral auxiliaries and chiral catalysts has significantly improved the stereoselectivity for glycosylation reactions and the site-selectivity for the modification of carbohydrates. These new tools will greatly facilitate the efficient synthesis of oligosaccharides, polysaccharides, and glycoconjugates. In this tutorial review, we will summarize these advances and highlight the most recent examples.
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Affiliation(s)
- Hao-Yuan Wang
- School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705, USA.
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25
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Tanaka M, Nakagawa A, Nishi N, Iijima K, Sawa R, Takahashi D, Toshima K. Boronic-Acid-Catalyzed Regioselective and 1,2- cis-Stereoselective Glycosylation of Unprotected Sugar Acceptors via S Ni-Type Mechanism. J Am Chem Soc 2018; 140:3644-3651. [PMID: 29457892 DOI: 10.1021/jacs.7b12108] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Regio- and 1,2- cis-stereoselective chemical glycosylation of unprotected glycosyl acceptors has been in great demand for the efficient synthesis of natural glycosides. However, simultaneously regulating these selectivities has been a longstanding problem in synthetic organic chemistry. In nature, glycosyl transferases catalyze regioselective 1,2- cis-glycosylations via the SNi mechanism, yet no useful chemical glycosylations based on this mechanism have been developed. In this paper, we report a highly regio- and 1,2- cis-stereoselective SNi-type glycosylation of 1,2-anhydro donors and unprotected sugar acceptors using p-nitrophenylboronic acid (10e) as a catalyst in the presence of water under mild conditions. Highly controlled regio- and 1,2- cis-stereoselectivities were achieved via the combination of boron-mediated carbohydrate recognition and the SNi-type mechanism. Mechanistic studies using the KIEs and DFT calculations were consistent with a highly dissociative concerted SNi mechanism. This glycosylation method was applied successfully to the direct glycosylation of unprotected natural glycosides and the efficient synthesis of a complex oligosaccharide with minimal protecting groups.
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Affiliation(s)
- Masamichi Tanaka
- Department of Applied Chemistry, Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi , Kohoku-ku, Yokohama 223-8522 , Japan
| | - Akira Nakagawa
- Department of Applied Chemistry, Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi , Kohoku-ku, Yokohama 223-8522 , Japan
| | - Nobuya Nishi
- Department of Applied Chemistry, Faculty of Science and Technology , Keio University , 3-14-1 Hiyoshi , Kohoku-ku, Yokohama 223-8522 , Japan
| | - Kiyoko Iijima
- Institute of Microbial Chemistry (BIKAKEN) , 3-14-23 Kamiosaki , Shinagawa-ku, Tokyo 141-0021 , Japan
| | - Ryuichi Sawa
- Institute of Microbial Chemistry (BIKAKEN) , 3-14-23 Kamiosaki , Shinagawa-ku, Tokyo 141-0021 , 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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26
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Pal R, Das A, Jayaraman N. Radical halogenation-mediated latent–active glycosylations of allyl glycosides. Chem Commun (Camb) 2018; 54:588-590. [DOI: 10.1039/c7cc07332a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Radical halogenation-mediated glycosylation using allyl glycosides as donors and as acceptors emerges to be an efficient and hither-to unknown glycosylation method, adhering to the concept of the latent–active methodology.
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Affiliation(s)
- Rita Pal
- Department of Organic Chemistry
- Indian Institute of Science
- Bangalore 560012
- India
| | - Anupama Das
- Department of Organic Chemistry
- Indian Institute of Science
- Bangalore 560012
- India
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27
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Advances in Stereoselective 1,2-cis
Glycosylation using C-2 Auxiliaries. Chemistry 2017; 23:17637-17653. [DOI: 10.1002/chem.201700908] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Indexed: 12/14/2022]
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28
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Yao H, Zhang S, Leng WL, Leow ML, Xiang S, He J, Liao H, Le Mai Hoang K, Liu XW. Catalyst-Controlled Stereoselective O-Glycosylation: Pd(0) vs Pd(II). ACS Catal 2017. [DOI: 10.1021/acscatal.7b01630] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hui Yao
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Shasha Zhang
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Wei-Lin Leng
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Min-Li Leow
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Shaohua Xiang
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Jingxi He
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Hongze Liao
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Kim Le Mai Hoang
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
| | - Xue-Wei Liu
- Division of Chemistry and
Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371
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29
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: An update for 2011-2012. MASS SPECTROMETRY REVIEWS 2017; 36:255-422. [PMID: 26270629 DOI: 10.1002/mas.21471] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 01/15/2015] [Indexed: 06/04/2023]
Abstract
This review is the seventh update of the original article published in 1999 on the application of MALDI mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2012. General aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, and fragmentation are covered in the first part of the review and applications to various structural types constitute the remainder. The main groups of compound are oligo- and poly-saccharides, glycoproteins, glycolipids, glycosides, and biopharmaceuticals. Much of this material is presented in tabular form. Also discussed are medical and industrial applications of the technique, studies of enzyme reactions, and applications to chemical synthesis. © 2015 Wiley Periodicals, Inc. Mass Spec Rev 36:255-422, 2017.
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Affiliation(s)
- David J Harvey
- Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, Oxford, OX1 3QU, UK
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30
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Zhou J, Lv S, Zhang D, Xia F, Hu W. Deactivating Influence of 3-O-Glycosyl Substituent on Anomeric Reactivity of Thiomannoside Observed in Oligomannoside Synthesis. J Org Chem 2017; 82:2599-2621. [DOI: 10.1021/acs.joc.6b03017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Jun Zhou
- Shanghai Engineering Research
Center of Molecular Therapeutics and New Drug Development, School
of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Siying Lv
- Shanghai Engineering Research
Center of Molecular Therapeutics and New Drug Development, School
of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Dan Zhang
- Shanghai Engineering Research
Center of Molecular Therapeutics and New Drug Development, School
of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Fei Xia
- Shanghai Engineering Research
Center of Molecular Therapeutics and New Drug Development, School
of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
| | - Wenhao Hu
- Shanghai Engineering Research
Center of Molecular Therapeutics and New Drug Development, School
of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China
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31
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Gu X, Fang Z. Synthesis of a small library of oximes and phenylhydrazones of phenyl ketone C-glycosides. J Carbohydr Chem 2016. [DOI: 10.1080/07328303.2016.1227830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Xiaomin Gu
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing, JS, P. R. China
| | - Zhijie Fang
- School of Chemical Engineering, Nanjing University of Science & Technology, Nanjing, JS, P. R. China
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32
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Xiao X, Zhao Y, Shu P, Zhao X, Liu Y, Sun J, Zhang Q, Zeng J, Wan Q. Remote Activation of Disarmed Thioglycosides in Latent-Active Glycosylation via Interrupted Pummerer Reaction. J Am Chem Soc 2016; 138:13402-13407. [DOI: 10.1021/jacs.6b08305] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Xiong Xiao
- Hubei
Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation,
School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People’s Republic of China
| | - Yueqi Zhao
- Hubei
Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation,
School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People’s Republic of China
| | - Penghua Shu
- Hubei
Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation,
School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People’s Republic of China
| | - Xiang Zhao
- Hubei
Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation,
School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People’s Republic of China
| | - Yan Liu
- Hubei
Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation,
School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People’s Republic of China
| | - Jiuchang Sun
- Hubei
Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation,
School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People’s Republic of China
| | - Qian Zhang
- Hubei
Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation,
School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People’s Republic of China
| | - Jing Zeng
- Hubei
Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation,
School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People’s Republic of China
| | - Qian Wan
- Hubei
Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation,
School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People’s Republic of China
- Institute
of Brain Research, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei 430030, People’s Republic of China
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33
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34
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Mensink RA, Elferink H, White PB, Pers N, Rutjes FPJT, Boltje TJ. A Study on Stereoselective Glycosylations via Sulfonium Ion Intermediates. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600898] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rens A. Mensink
- Synthetic organic chemistry; Institute for Molecules and Materials; Heyendaalseweg 135 Nijmegen The Netherlands
| | - Hidde Elferink
- Synthetic organic chemistry; Institute for Molecules and Materials; Heyendaalseweg 135 Nijmegen The Netherlands
| | - Paul B. White
- Synthetic organic chemistry; Institute for Molecules and Materials; Heyendaalseweg 135 Nijmegen The Netherlands
| | - Nathalie Pers
- Synthetic organic chemistry; Institute for Molecules and Materials; Heyendaalseweg 135 Nijmegen The Netherlands
| | - Floris P. J. T. Rutjes
- Synthetic organic chemistry; Institute for Molecules and Materials; Heyendaalseweg 135 Nijmegen The Netherlands
| | - Thomas J. Boltje
- Synthetic organic chemistry; Institute for Molecules and Materials; Heyendaalseweg 135 Nijmegen The Netherlands
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35
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Goswami M, Ashley DC, Baik MH, Pohl NLB. Mechanistic Studies of Bismuth(V)-Mediated Thioglycoside Activation Reveal Differential Reactivity of Anomers. J Org Chem 2016; 81:5949-62. [PMID: 27295299 DOI: 10.1021/acs.joc.6b00860] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mechanism of bismuth(V)-mediated thioglycoside activation was examined using reaction kinetics and quantum chemical reaction models. NMR experiments show an unusual nonlinear growth/decay curve for the glycosylation reaction. Further studies suggest an anomeric inversion of the β-glycoside donor to the α-donor during its activation, even in the presence of a neighboring 2-position acetate. Interestingly, in situ anomerization was not observed in the activation of an α-glycoside donor, and this anomer also showed faster reaction times and higher product diastereoselectivites. Density functional theory calculations identify the structure of the promoter triphenyl bismuth ditriflate, [Ph3Bi(OTf)2, 1], in solution and map out the energetics of its interactions with the two thioglycoside anomers. These calculations suggest that 1 must bind the thiopropyl arm to induce triflate loss. The computational analyses also show that, unlike most O-glycosides, the β- and α-donor S-glycosides are similar in energy. One energetically reasonable anomerization pathway of the donors is an SN1-like mechanism promoted by forming a bismuth-sulfonium adduct with the Lewis acidic Bi(V) for the formation of an oxacarbenium intermediate. Finally, the computed energy compensations needed to form these α vs β Bi adducts is a possible explanation for the differential reactivity of these donors.
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Affiliation(s)
- Manibarsha Goswami
- Department of Chemistry, Iowa State University , Ames, Iowa 50011, United States
| | - Daniel C Ashley
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States
| | - Mu-Hyun Baik
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) , Daejeon 305-701, Korea.,Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 305-701, Korea
| | - Nicola L B Pohl
- Department of Chemistry, Indiana University , Bloomington, Indiana 47405, United States.,Department of Chemical and Biological Engineering, Iowa State University , Ames, Iowa 50011, United States
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36
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37
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Wang Q, Wei X, Liao K, Li H, Meng X, Li Z. A convenient preparation of glycosyl sulfoxides and its application to the synthesis of Salidroside epimer. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.04.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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38
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Abstract
Anomeric sulfonium ions are attractive glycosyl donors for the stereoselective installation of 1,2-cis glycosides. Although these donors are receiving increasing attention, their mechanism of glycosylation remains controversial. We have investigated the reaction mechanism of glycosylation of a donor modified at C-2 with a (1S)-phenyl-2-(phenylsulfanyl)ethyl chiral auxiliary. Preactivation of this donor results in the formation of a bicyclic β-sulfonium ion that after addition of an alcohol undergoes 1,2-cis-glycosylation. To probe the importance of the thiophenyl moiety, analogs were prepared in which this moiety was replaced by an anisoyl or benzyl moiety. Furthermore, the auxiliaries were installed as S- and R-stereoisomers. It was found that the nature of the heteroatom and chirality of the auxiliary greatly influenced the anomeric outcome and only the one containing a thiophenyl moiety and having S-configuration gave consistently α-anomeric products. The sulfonium ions are sufficiently stable at a temperature at which glycosylations proceed indicating that they are viable glycosylation agents. Time-course NMR experiments with the latter donor showed that the initial rates of glycosylations increase with increases in acceptor concentration and the rate curves could be fitted to a second order rate equation. Collectively, these observations support a mechanism by which a sulfonium ion intermediate is formed as a trans-decalin ring system that can undergo glycosylation through a bimolecular mechanism. DFT calculations have provided further insight into the reaction path of glycosylation and indicate that initially a hydrogen-bonded complex is formed between sulfonium ion and acceptor that undergoes SN2-like glycosylation to give an α-anomeric product.
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Affiliation(s)
- Tao Fang
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Yi Gu
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Wei Huang
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Geert-Jan Boons
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, and Bijvoet Center for Biomolecular Research, University of Utrecht, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
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39
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Watson AJA, Alexander SR, Cox DJ, Fairbanks AJ. Protecting Group Dependence of Stereochemical Outcome of Glycosylation of 2-O-(Thiophen-2-yl)methyl Ether Protected Glycosyl Donors. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600071] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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40
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Visansirikul S, Yasomanee JP, Demchenko AV. Halobenzoyl groups in glycosylation: effect on stereoselectivity and reactivity of glycosyl donors. Russ Chem Bull 2016. [DOI: 10.1007/s11172-015-0987-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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41
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Zhang T, Wang T, Fang Z. Synthesis, screening and sensing applications of a novel fluorescent probe based on C-glycosides. RSC Adv 2016. [DOI: 10.1039/c5ra26037j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
A novel water soluble fluorescent probe based on C-glycoside with an aromatic aldehyde unit has been synthesized and its UV/Vis and fluorescence spectra, aggregation and disaggregation with bovine serum albumin were studied.
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Affiliation(s)
- Tao Zhang
- Department of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- P. R. China
| | - Tianyi Wang
- Department of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- P. R. China
| | - Zhijie Fang
- Department of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- P. R. China
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42
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Qiao Y, Ge W, Jia L, Hou X, Wang Y, Pedersen CM. Glycosylation intermediates studied using low temperature1H- and19F-DOSY NMR: new insight into the activation of trichloroacetimidates. Chem Commun (Camb) 2016; 52:11418-11421. [DOI: 10.1039/c6cc05272j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Low temperature1H- and19F-DOSY have been used for analyzing reactive intermediates in glycosylation reactions, where a glycosyl trichloroacetimidate donor has been activated using different catalysts.
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Affiliation(s)
- Yan Qiao
- Analytical Instrumentation Center & State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- People's Republic of China
| | - Wenzhi Ge
- Analytical Instrumentation Center & State Key Laboratory of Coal Conversion
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- People's Republic of China
| | - Lingyu Jia
- Shanxi Engineering Research Center of Biorefinery
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- People's Republic of China
| | - Xianglin Hou
- Shanxi Engineering Research Center of Biorefinery
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- People's Republic of China
| | - Yingxiong Wang
- Shanxi Engineering Research Center of Biorefinery
- Institute of Coal Chemistry
- Chinese Academy of Sciences
- Taiyuan 030001
- People's Republic of China
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43
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Zhang T, Wang T, Fang Z. Regioselective Monoesterification Study of the Diol in 1-C-(4,6-O-Benzylidene-β-D-glucopyranosyl) Acetone. SYNTHETIC COMMUN 2015. [DOI: 10.1080/00397911.2015.1093143] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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44
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Salamone S, Guerreiro C, Cambon E, Hargreaves JM, Tarrat N, Remaud-Siméon M, André I, Mulard LA. Investigation on the Synthesis of Shigella flexneri Specific Oligosaccharides Using Disaccharides as Potential Transglucosylase Acceptor Substrates. J Org Chem 2015; 80:11237-57. [PMID: 26340432 DOI: 10.1021/acs.joc.5b01407] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Chemo-enzymatic strategies hold great potential for the development of stereo- and regioselective syntheses of structurally defined bioactive oligosaccharides. Herein, we illustrate the potential of the appropriate combination of a planned chemo-enzymatic pathway and an engineered biocatalyst for the multistep synthesis of an important decasaccharide for vaccine development. We report the stepwise investigation, which led to an efficient chemical conversion of allyl α-d-glucopyranosyl-(1→4)-α-l-rhamnopyranosyl-(1→3)-2-deoxy-2-trichloroacetamido-β-d-glucopyranoside, the product of site-specific enzymatic α-d-glucosylation of a lightly protected non-natural disaccharide acceptor, into a pentasaccharide building block suitable for chain elongation at both ends. Successful differentiation between hydroxyl groups features the selective acylation of primary alcohols and acetalation of a cis-vicinal diol, followed by a controlled per-O-benzylation step. Moreover, we describe the successful use of the pentasaccharide intermediate in the [5 + 5] synthesis of an aminoethyl aglycon-equipped decasaccharide, corresponding to a dimer of the basic repeating unit from the O-specific polysaccharide of Shigella flexneri 2a, a major cause of bacillary dysentery. Four analogues of the disaccharide acceptor were synthesized and evaluated to reach a larger repertoire of O-glucosylation patterns encountered among S. flexneri type-specific polysaccharides. New insights on the potential and limitations of planned chemo-enzymatic pathways in oligosaccharide synthesis are provided.
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Affiliation(s)
- Stéphane Salamone
- Institut Pasteur , Unité de Chimie des Biomolécules, 28 rue du Dr Roux, 75724, Paris Cedex 15 France.,CNRS UMR 3523, Institut Pasteur , 75015 Paris, France
| | - Catherine Guerreiro
- Institut Pasteur , Unité de Chimie des Biomolécules, 28 rue du Dr Roux, 75724, Paris Cedex 15 France.,CNRS UMR 3523, Institut Pasteur , 75015 Paris, France
| | - Emmanuelle Cambon
- Université de Toulouse , INSA,UPS,INP; LISBP, 135 Avenue de Rangueil, 31077 Toulouse, France.,CNRS, UMR5504 , F-31400 Toulouse, France.,INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés , F-31400 Toulouse, France
| | - Jason M Hargreaves
- Institut Pasteur , Unité de Chimie des Biomolécules, 28 rue du Dr Roux, 75724, Paris Cedex 15 France.,CNRS UMR 3523, Institut Pasteur , 75015 Paris, France
| | - Nathalie Tarrat
- Université de Toulouse , INSA,UPS,INP; LISBP, 135 Avenue de Rangueil, 31077 Toulouse, France.,CNRS, UMR5504 , F-31400 Toulouse, France.,INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés , F-31400 Toulouse, France
| | - Magali Remaud-Siméon
- Université de Toulouse , INSA,UPS,INP; LISBP, 135 Avenue de Rangueil, 31077 Toulouse, France.,CNRS, UMR5504 , F-31400 Toulouse, France.,INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés , F-31400 Toulouse, France
| | - Isabelle André
- Université de Toulouse , INSA,UPS,INP; LISBP, 135 Avenue de Rangueil, 31077 Toulouse, France.,CNRS, UMR5504 , F-31400 Toulouse, France.,INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés , F-31400 Toulouse, France
| | - Laurence A Mulard
- Institut Pasteur , Unité de Chimie des Biomolécules, 28 rue du Dr Roux, 75724, Paris Cedex 15 France.,CNRS UMR 3523, Institut Pasteur , 75015 Paris, France
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45
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Shu P, Xiao X, Zhao Y, Xu Y, Yao W, Tao J, Wang H, Yao G, Lu Z, Zeng J, Wan Q. Interrupted Pummerer Reaction in Latent‐Active Glycosylation: Glycosyl Donors with a Recyclable and Regenerative Leaving Group. Angew Chem Int Ed Engl 2015; 54:14432-6. [DOI: 10.1002/anie.201507861] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Penghua Shu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030 (China)
| | - Xiong Xiao
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030 (China)
| | - Yueqi Zhao
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030 (China)
| | - Yang Xu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030 (China)
| | - Wang Yao
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030 (China)
| | - Jinyi Tao
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030 (China)
| | - Hao Wang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030 (China)
| | - Guangmin Yao
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030 (China)
| | - Zimin Lu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030 (China)
| | - Jing Zeng
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030 (China)
| | - Qian Wan
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Huazhong University of Science and Technology, 13 Hangkong Road, Wuhan, Hubei, 430030 (China)
- Institute of Brain Research, Huazhong University of Science and Technology (China)
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46
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Shu P, Xiao X, Zhao Y, Xu Y, Yao W, Tao J, Wang H, Yao G, Lu Z, Zeng J, Wan Q. Interrupted Pummerer Reaction in Latent-Active Glycosylation: Glycosyl Donors with a Recyclable and Regenerative Leaving Group. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507861] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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47
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Huang W, Gao Q, Boons GJ. Assembly of a Complex Branched Oligosaccharide by Combining Fluorous-Supported Synthesis and Stereoselective Glycosylations using Anomeric Sulfonium Ions. Chemistry 2015; 21:12920-6. [PMID: 26250358 PMCID: PMC4878019 DOI: 10.1002/chem.201501844] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Indexed: 11/09/2022]
Abstract
There is an urgent need to develop reliable strategies for the rapid assembly of complex oligosaccharides. This paper presents a set of strategically selected orthogonal protecting groups, glycosyl donors modified by a (S)-phenylthiomethylbenzyl ether at C-2, and a glycosyl acceptor containing a fluorous tag, which makes it possible to rapidly prepare complex branched oligosaccharides of biological importance. The C-2 auxiliary controlled the 1,2-cis anomeric selectivity of the various galactosylations. The orthogonal protecting groups, 2-naphthylmethyl ether (Nap) and levulinic ester (Lev), made it possible to generate glycosyl acceptors and allowed the installation of a crowded branching point. After the glycosylations, the chiral auxiliary could be removed using acidic conditions, which was compatible with the presence of the orthogonal protecting groups Lev and Nap, thereby allowing the efficient installation of 1,2-linked glycosides. The light fluorous tag made it possible to purify the compounds by a simple filtration method using silica gel modified by fluorocarbons. The set of building blocks was successfully employed for the preparation of the carbohydrate moiety of the GPI anchor of Trypanosoma brucei, which is a parasite that causes sleeping sickness in humans and similar diseases in domestic animals.
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Affiliation(s)
- Wei Huang
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA 30602 (USA)
- Department of Chemistry, University of Georgia, Athens, GA 30602 (USA)
| | - Qi Gao
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA 30602 (USA)
| | - Geert-Jan Boons
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA 30602 (USA).
- Department of Chemistry, University of Georgia, Athens, GA 30602 (USA).
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48
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Singh GP, Watson AJA, Fairbanks AJ. Achiral 2-Hydroxy Protecting Group for the Stereocontrolled Synthesis of 1,2-cis-α-Glycosides by Six-Ring Neighboring Group Participation. Org Lett 2015; 17:4376-9. [PMID: 26308903 DOI: 10.1021/acs.orglett.5b02226] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Glycosylation of a fully armed donor bearing a 2-O-(trimethoxybenzenethiol) ethyl ether protecting group is completely α-selective with a range of carbohydrate alcohol acceptors. Low-temperature NMR studies confirm the intermediacy of cyclic sulfonium ion intermediates arising from six-membered β-sulfonium ring neighboring group participation. Selective protecting group removal is achieved in high yield in a single operation by S-methylation and base-induced β-elimination.
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Affiliation(s)
- Govind P Singh
- Department of Chemistry and ‡Biomolecular Interaction Centre, University of Canterbury , Private Bag 4800, Christchurch 8140, New Zealand
| | - Andrew J A Watson
- Department of Chemistry and ‡Biomolecular Interaction Centre, University of Canterbury , Private Bag 4800, Christchurch 8140, New Zealand
| | - Antony J Fairbanks
- Department of Chemistry and ‡Biomolecular Interaction Centre, University of Canterbury , Private Bag 4800, Christchurch 8140, New Zealand
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49
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Nakagawa A, Tanaka M, Hanamura S, Takahashi D, Toshima K. Regioselective and 1,2-cis-α-Stereoselective Glycosylation Utilizing Glycosyl-Acceptor-Derived Boronic Ester Catalyst. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/anie.201504182] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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50
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Nakagawa A, Tanaka M, Hanamura S, Takahashi D, Toshima K. Regioselective and 1,2-cis-α-Stereoselective Glycosylation Utilizing Glycosyl-Acceptor-Derived Boronic Ester Catalyst. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504182] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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