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Lu IC, Cheng KC, Wang YF, Pan CW, Hung JS, Mong KKT. Orthogonal Glycosylation with Phosphate Acceptors for Expeditious Synthesis of Bacterial Inner Core Oligosaccharides. Chem Asian J 2023; 18:e202300424. [PMID: 37339944 DOI: 10.1002/asia.202300424] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 06/15/2023] [Accepted: 06/20/2023] [Indexed: 06/22/2023]
Abstract
We report a practical one-pot glycosylation strategy for synthesis of bacterial inner core oligosaccharides that composed of unavailable L-glycero-D-manno and D-glycero-D-manno-heptopyranose components. The glycosylation method features a new orthogonal glycosylation procedure; whereby a phosphate acceptor is coupled with a thioglycosyl donor producing a disaccharide phosphate, which can be engaged in another orthogonal glycosylation procedure to couple with a thioglycosyl acceptor. The phosphate acceptors used in above one-pot procedure are directly prepared from thioglycosyl acceptors via the in-situ phosphorylation. Such phosphate acceptor preparation protocol eliminates the traditional protection and deprotection procedures. Based on the new one-pot glycosylation strategy, two partial inner core structures of Yersinia pestis lipopolysaccharide and Haemophilus ducreyi lipooligosaccharide were acquired.
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Affiliation(s)
- I-Chen Lu
- Applied Chemistry Department, National Yang-Ming Chiao Tung University, 1001, University Road, East District, Hsinchu City, 30093, R.O.C., Taiwan
| | - Kuang-Chun Cheng
- Applied Chemistry Department, National Yang-Ming Chiao Tung University, 1001, University Road, East District, Hsinchu City, 30093, R.O.C., Taiwan
| | - Yi-Fang Wang
- Applied Chemistry Department, National Yang-Ming Chiao Tung University, 1001, University Road, East District, Hsinchu City, 30093, R.O.C., Taiwan
| | - Chia-Wei Pan
- Applied Chemistry Department, National Yang-Ming Chiao Tung University, 1001, University Road, East District, Hsinchu City, 30093, R.O.C., Taiwan
| | - Jan-Siang Hung
- Applied Chemistry Department, National Yang-Ming Chiao Tung University, 1001, University Road, East District, Hsinchu City, 30093, R.O.C., Taiwan
| | - Kwok-Kong Tony Mong
- Applied Chemistry Department, National Yang-Ming Chiao Tung University, 1001, University Road, East District, Hsinchu City, 30093, R.O.C., Taiwan
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2
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Meng S, Hettiarachchi IL, Bhetuwal BR, Thapa P, Zhu J. Stereoselective Synthesis of β-d-Manno-heptopyranoside via Cs 2CO 3-Mediated Anomeric O-Alkylation: Synthesis of a Tetrasaccharide Repeat Unit of Bacillus thermoaerophilus Surface-Layer Glycoprotein. J Org Chem 2022; 87:6588-6600. [PMID: 35537215 PMCID: PMC9166265 DOI: 10.1021/acs.joc.2c00168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Stereoselective synthesis of d-glycero- and l-glycero-β-d-mannoheptosides has been achieved by cesium carbonate-mediated β-selective anomeric O-alkylation of the corresponding d-mannoheptoses. In addition, this method has been utilized in the total synthesis of a tetrasaccharide repeat unit of Bacillus thermoaerophilus surface-layer glycoprotein.
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Affiliation(s)
- Shuai Meng
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
| | - Ishani Lakshika Hettiarachchi
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
| | - Bishwa Raj Bhetuwal
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
| | - Prakash Thapa
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
| | - Jianglong Zhu
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
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3
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Riu F, Ruda A, Engström O, Muheim C, Mobarak H, Ståhle J, Kosma P, Carta A, Daley DO, Widmalm G. A Lead-Based Fragment Library Screening of the Glycosyltransferase WaaG from Escherichia coli. Pharmaceuticals (Basel) 2022; 15:ph15020209. [PMID: 35215321 PMCID: PMC8877264 DOI: 10.3390/ph15020209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2022] [Revised: 02/05/2022] [Accepted: 02/06/2022] [Indexed: 11/16/2022] Open
Abstract
Glucosyl transferase I (WaaG) in E. coli catalyzes the transfer of an α-d-glucosyl group to the inner core of the lipopolysaccharide (LPS) and plays an important role in the biogenesis of the outer membrane. If its activity could be inhibited, the integrity of the outer membrane would be compromised and the bacterium would be susceptible to antibiotics that are normally prevented from entering the cell. Herein, three libraries of molecules (A, B and C) were docked in the binding pocket of WaaG, utilizing the docking binding affinity as a filter to select fragment-based compounds for further investigations. From the results of the docking procedure, a selection of compounds was investigated by molecular dynamics (MD) simulations to obtain binding free energy (BFE) and KD values for ligands as an evaluation for the binding to WaaG. Derivatives of 1,3-thiazoles (A7 and A4) from library A and 1,3,4-thiadiazole (B33) from library B displayed a promising profile of BFE, with KD < mM, viz., 0.11, 0.62 and 0.04 mM, respectively. Further root-mean-square-deviation (RMSD), electrostatic/van der Waals contribution to the binding and H-bond interactions displayed a favorable profile for ligands A4 and B33. Mannose and/or heptose-containing disaccharides C1–C4, representing sub-structures of the inner core of the LPS, were also investigated by MD simulations, and compound C42− showed a calculated KD = 0.4 µM. In the presence of UDP-Glc2−, the best-docked pose of disaccharide C42− is proximate to the glucose-binding site of WaaG. A study of the variation in angle and distance was performed on the different portions of WaaG (N-, the C- domains and the hinge region). The Spearman correlation coefficient between the two variables was close to unity, where both variables increase in the same way, suggesting a conformational rearrangement of the protein during the MD simulation, revealing molecular motions of the enzyme that may be part of the catalytic cycle. Selected compounds were also analyzed by Saturation Transfer Difference (STD) NMR experiments. STD effects were notable for the 1,3-thiazole derivatives A4, A8 and A15 with the apo form of the protein as well as in the presence of UDP for A4.
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Affiliation(s)
- Federico Riu
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Via Muroni, 23A, 07100 Sassari, Italy; (F.R.); (A.C.)
| | - Alessandro Ruda
- Arrhenius Laboratory, Department of Organic Chemistry, Stockholm University, S-106 91 Stockholm, Sweden; (A.R.); (O.E.); (H.M.); (J.S.)
| | - Olof Engström
- Arrhenius Laboratory, Department of Organic Chemistry, Stockholm University, S-106 91 Stockholm, Sweden; (A.R.); (O.E.); (H.M.); (J.S.)
| | - Claudio Muheim
- Arrhenius Laboratory, Department of Biochemistry and Biophysics, Stockholm University, S-106 91 Stockholm, Sweden; (C.M.); (D.O.D.)
| | - Hani Mobarak
- Arrhenius Laboratory, Department of Organic Chemistry, Stockholm University, S-106 91 Stockholm, Sweden; (A.R.); (O.E.); (H.M.); (J.S.)
| | - Jonas Ståhle
- Arrhenius Laboratory, Department of Organic Chemistry, Stockholm University, S-106 91 Stockholm, Sweden; (A.R.); (O.E.); (H.M.); (J.S.)
| | - Paul Kosma
- Department of Chemistry, University of Natural Resources and Life Sciences—Vienna, 1190 Vienna, Austria;
| | - Antonio Carta
- Department of Medical, Surgical and Experimental Sciences, University of Sassari, Via Muroni, 23A, 07100 Sassari, Italy; (F.R.); (A.C.)
| | - Daniel O. Daley
- Arrhenius Laboratory, Department of Biochemistry and Biophysics, Stockholm University, S-106 91 Stockholm, Sweden; (C.M.); (D.O.D.)
| | - Göran Widmalm
- Arrhenius Laboratory, Department of Organic Chemistry, Stockholm University, S-106 91 Stockholm, Sweden; (A.R.); (O.E.); (H.M.); (J.S.)
- Correspondence:
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Mong KKT, Cheng KC, Lu IC, Pan CW, Wang YF, Shen LC. Cascade In Situ Phosphorylation and One-Pot Glycosylation for Rapid Synthesis of Heptose-Containing Oligosaccharides. J Org Chem 2020; 85:16060-16071. [PMID: 33236906 DOI: 10.1021/acs.joc.0c01828] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We report a one-pot glycosylation strategy for achieving rapid syntheses of heptose (Hep)-containing oligosaccharides. The reported procedure was designed to incorporate an in situ phosphorylation step into an orthogonal one-pot glycosylation. Hep-containing oligosaccharides were assembled directly from building blocks with minimal effort expended on manipulation of protecting and aglycone leaving groups. The utility of our one-pot procedure was illustrated by synthesizing partial core oligosaccharide structure present in the lipopolysaccharide of Ralstonia solanacearum.
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Affiliation(s)
- Kwok-Kong Tony Mong
- Applied Chemistry Department, National Chiao Tung University 1001 University Road, Hsinchu City, Taiwan 30010, ROC
| | - Kuang-Chun Cheng
- Applied Chemistry Department, National Chiao Tung University 1001 University Road, Hsinchu City, Taiwan 30010, ROC
| | - I-Chen Lu
- Applied Chemistry Department, National Chiao Tung University 1001 University Road, Hsinchu City, Taiwan 30010, ROC
| | - Chia-Wei Pan
- Applied Chemistry Department, National Chiao Tung University 1001 University Road, Hsinchu City, Taiwan 30010, ROC
| | - Yi-Fang Wang
- Applied Chemistry Department, National Chiao Tung University 1001 University Road, Hsinchu City, Taiwan 30010, ROC
| | - Li-Ching Shen
- Applied Chemistry Department, National Chiao Tung University 1001 University Road, Hsinchu City, Taiwan 30010, ROC
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Wang J, Rong J, Lou Q, Zhu Y, Yang Y. Synthesis of l- glycero- and d- glycero-d- manno-Heptose Building Blocks for Stereoselective Assembly of the Lipopolysaccharide Core Trisaccharide of Vibrio parahemolyticus O2. Org Lett 2020; 22:8018-8022. [PMID: 32991182 DOI: 10.1021/acs.orglett.0c02961] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Synthesis of bacterial cell surface l-glycero-d-manno-heptose (l,d-Hep)- and d-glycero-d-manno-heptose (d,d-Hep)-containing higher carbon sugars is a challenging task. Here, we report a convenient and efficient approach for the synthesis of the l,d-Hep and d,d-Hep building blocks. Using l-lyxose and d-ribose as starting materials, this approach features diastereoselective Mukaiyama-type aldol reactions as the key steps. On the basis of the synthetic l,d-Hep and d,d-Hep building blocks, we achieved the first stereoselective synthesis of the unique α-l,d-Hep-(1→3)-α-d,d-Hep-(1→5)-α-Kdo core trisaccharide of the lipopolysaccharide of Vibrio parahemolyticus O2.
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Affiliation(s)
- Junchang Wang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Jingjing Rong
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Qixin Lou
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yirong Zhu
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - You Yang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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6
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Suster C, Baxendale IR, Mihovilovic MD, Stanetty C. Straight Forward and Versatile Differentiation of the l- glycero and d- glycero-d- manno Heptose Scaffold. Front Chem 2020; 8:625. [PMID: 32850647 PMCID: PMC7411327 DOI: 10.3389/fchem.2020.00625] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 06/15/2020] [Indexed: 01/08/2023] Open
Abstract
Bacterial lipopolysaccharides (LPS) are important bio-medical structures, playing a major role in the interaction with human immune systems. Their core regions, containing multiple units of l-glycero-d-manno heptoses (l,d-heptose), are highly conserved structurally (with O3 and O7 glycosidic bonds), making them an epitope of high interest for the potential development of new antibiotics and vaccines. Research in this field has always been restricted by the limited availability of the parent l,d-heptose as well as its biochemical epimeric precursor d-glycero-d-manno heptose (d,d-heptose). This problem of availability has recently been solved by us, through a rapid and efficient practical synthesis of l,d-manno-heptose peracetate demonstrated at scale. Herein we report an optimized, technically simple and versatile synthetic strategy for the differentiation of both the l-glycero and d-glycero-d-manno heptose scaffolds. Our approach is based on an orthoester methodology for the differentiation of all three positions of the sugar core using a O6, O7-tetraisopropyl disiloxyl (TIPDS) protecting group for the exocyclic positions. Furthermore, the regioselective opening toward 7-OH acceptors (6O-FTIPDS ethers) differentiates the exocyclic diol which has been demonstrated with a broader set of substrates and for both manno-heptoses for the first time.
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Affiliation(s)
- Christoph Suster
- Faculty of Technical Chemistry, Institute of Applied Synthetic Chemistry, TU Wien, Vienna, Austria
| | - Ian R Baxendale
- Department of Chemistry, University of Durham, Durham, United Kingdom
| | - Marko D Mihovilovic
- Faculty of Technical Chemistry, Institute of Applied Synthetic Chemistry, TU Wien, Vienna, Austria
| | - Christian Stanetty
- Faculty of Technical Chemistry, Institute of Applied Synthetic Chemistry, TU Wien, Vienna, Austria
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7
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Walter M, Kohout C, Blaukopf M, Kosma P. Synthesis of 3- O- and 4- O-(2-aminoethylphosphono) derivatives of methyl l- glycero-α-d- manno-heptopyranoside. MONATSHEFTE FUR CHEMIE 2016; 148:111-119. [PMID: 28127097 PMCID: PMC5225220 DOI: 10.1007/s00706-016-1868-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 10/25/2016] [Indexed: 11/06/2022]
Abstract
ABSTRACT Phosphoethanolamine derivatives of the bacterial saccharide l-glycero-d-manno-heptose have been prepared using a phosphoramidite-based coupling reaction at position 4 of a side-chain-protected 2,3-O-orthoester methyl heptoside and at position 3 of a 3,4-diol heptoside, respectively. Global deprotection afforded the corresponding 2-aminoethylphosphodiester derivatives as substrates for crystallographic and binding studies with lectins and antibodies targeting the inner core structure of bacterial lipopolysaccharides. GRAPHICAL ABSTRACT
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Affiliation(s)
- Martin Walter
- Department of Chemistry, University of Natural Resources and Life Sciences-Vienna, Vienna, Austria
| | - Claudia Kohout
- Department of Chemistry, University of Natural Resources and Life Sciences-Vienna, Vienna, Austria
| | - Markus Blaukopf
- Department of Chemistry, University of Natural Resources and Life Sciences-Vienna, Vienna, Austria
| | - Paul Kosma
- Department of Chemistry, University of Natural Resources and Life Sciences-Vienna, Vienna, Austria
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8
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Rajasekaran P, Singh GP, Hassam M, Vankar YD. A Cascade “Prins-Pinacol-Type Rearrangement and C4-OBn Participation” on Carbohydrate Substrates: Synthesis of Bridged Tricyclic Ketals, Annulated Sugars and C2-Branched Heptoses. Chemistry 2016; 22:18383-18387. [DOI: 10.1002/chem.201604902] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Indexed: 12/25/2022]
Affiliation(s)
| | - Govind Pratap Singh
- Department of Chemistry; Indian Institute of Technology; Kanpur 208016 India
| | - Mohammad Hassam
- Department of Chemistry; Indian Institute of Technology; Kanpur 208016 India
| | - Yashwant D. Vankar
- Department of Chemistry; Indian Institute of Technology; Kanpur 208016 India
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9
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Zhang K, Xu XH, Qing FL. Copper-Promoted Ritter-Type Trifluoroethoxylation of (Hetero)arenediazonium Tetrafluoroborates: A Method for the Preparation of Trifluoroethyl Imidates. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600941] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Ke Zhang
- College of Chemistry, Chemical Engineering and Biotechnology; Donghua University; 2999 North Renmin Lu 201620 Shanghai P. R. China
| | - Xiu-Hua Xu
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Science; 345 Lingling Lu 200032 Shanghai P. R. China
| | - Feng-Ling Qing
- College of Chemistry, Chemical Engineering and Biotechnology; Donghua University; 2999 North Renmin Lu 201620 Shanghai P. R. China
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Science; 345 Lingling Lu 200032 Shanghai P. R. China
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10
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Tikad A, Delbrouck JA, Vincent SP. Debenzylative Cycloetherification: An Overlooked Key Strategy for Complex Tetrahydrofuran Synthesis. Chemistry 2016; 22:9456-76. [DOI: 10.1002/chem.201600655] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Indexed: 01/22/2023]
Affiliation(s)
- Abdellatif Tikad
- University of Namur (UNamur); Département de Chimie; Laboratoire de Chimie Bio-Organique; rue de Bruxelles 61 5000 Namur Belgium
| | - Julien A. Delbrouck
- University of Namur (UNamur); Département de Chimie; Laboratoire de Chimie Bio-Organique; rue de Bruxelles 61 5000 Namur Belgium
| | - Stéphane P. Vincent
- University of Namur (UNamur); Département de Chimie; Laboratoire de Chimie Bio-Organique; rue de Bruxelles 61 5000 Namur Belgium
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11
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Stanetty C, Baxendale IR. Large-Scale Synthesis of Crystalline 1,2,3,4,6,7-Hexa- O-acetyl-l- glycero-α-d- manno-heptopyranose. European J Org Chem 2015; 2015:2718-2726. [PMID: 26097405 PMCID: PMC4464551 DOI: 10.1002/ejoc.201500024] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Indexed: 01/14/2023]
Abstract
The higher-carbon sugar l-glycero-d-manno-heptose is a major constituent of the inner core region of the lipopolysaccharide (LPS) of many Gram-negative bacteria. All preparative routes used to date require multiple steps, and scalability has been rarely addressed. Here a highly practical synthesis of crystalline 1,2,3,4,6,7-hexa-O-acetyl-l-glycero-α-d-manno-heptopyranose by a simple four-step sequence starting from l-lyxose is disclosed. Only two recrystallisations are required and the process was demonstrated on a >100 mmol scale, yielding 41 g of the target compound.
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Affiliation(s)
- Christian Stanetty
- Department of Chemistry, Durham UniversitySouth Road, Durham, DH1 3LE, United Kingdom
| | - Ian R Baxendale
- Department of Chemistry, Durham UniversitySouth Road, Durham, DH1 3LE, United Kingdom
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