1
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Bozzola T, Scalise M, Larsson CU, Newton-Vesty MC, Rovegno C, Mitra A, Cramer J, Wahlgren WY, Radhakrishnan Santhakumari P, Johnsson RE, Schwardt O, Ernst B, Friemann R, Dobson RCJ, Indiveri C, Schelin J, Nilsson UJ, Ellervik U. Sialic Acid Derivatives Inhibit SiaT Transporters and Delay Bacterial Growth. ACS Chem Biol 2022; 17:1890-1900. [PMID: 35675124 PMCID: PMC9295122 DOI: 10.1021/acschembio.2c00321] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
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Antibiotic resistance
is a major worldwide concern, and new drugs
with mechanistically novel modes of action are urgently needed. Here,
we report the structure-based drug design, synthesis, and evaluation
in vitro and in cellular systems of sialic acid derivatives able to
inhibit the bacterial sialic acid symporter SiaT. We designed and
synthesized 21 sialic acid derivatives and screened their affinity
for SiaT by a thermal shift assay and elucidated the inhibitory mechanism
through binding thermodynamics, computational methods, and inhibitory
kinetic studies. The most potent compounds, which have a 180-fold
higher affinity compared to the natural substrate, were tested in
bacterial growth assays and indicate bacterial growth delay in methicillin-resistant Staphylococcus aureus. This study represents the
first example and a promising lead in developing sialic acid uptake
inhibitors as novel antibacterial agents.
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Affiliation(s)
- Tiago Bozzola
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden.,Molecular Pharmacy Group, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Mariafrancesca Scalise
- Department DiBEST (Biologia, Ecologia, Scienze della Terra) Unit of Biochemistry and Molecular Biotechnology, University of Calabria, Via P. Bucci 4C, 87036 Arcavacata di Rende, Italy
| | - Christer U Larsson
- Division of Applied Microbiology, Department of Chemistry, Lund University, 22100 Lund, Sweden
| | - Michael C Newton-Vesty
- Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, 8140 Christchurch, New Zealand
| | - Caterina Rovegno
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Ankita Mitra
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Jonathan Cramer
- Molecular Pharmacy Group, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland.,Institute for Pharmaceutical and Medicinal Chemistry, Heinrich-Heine-University of Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany
| | - Weixiao Yuan Wahlgren
- Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, S-40530 Gothenburg, Sweden
| | - Partha Radhakrishnan Santhakumari
- Institute for Stem Cell Science and Regenerative Medicine, Bengaluru, Karnataka 560065, India.,Manipal Academy of Higher Education, Tiger Circle Road, Manipal, Karnataka 576104, India
| | | | - Oliver Schwardt
- Molecular Pharmacy Group, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Beat Ernst
- Molecular Pharmacy Group, Department of Pharmaceutical Sciences, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Rosmarie Friemann
- Department of Clinical Microbiology, Sahlgrenska University Hospital, 41345 Gothenburg, Sweden.,Centre for Antibiotic Resistance Research (CARe), University of Gothenburg, 40530 Gothenburg, Sweden
| | - Renwick C J Dobson
- Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, 8140 Christchurch, New Zealand.,Bio21 Molecular Science and Biotechnology Institute, Department of Biochemistry and Pharmacology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Cesare Indiveri
- Department DiBEST (Biologia, Ecologia, Scienze della Terra) Unit of Biochemistry and Molecular Biotechnology, University of Calabria, Via P. Bucci 4C, 87036 Arcavacata di Rende, Italy.,Institute of Biomembranes, Bioenergetics and Molecular Biotechnology (IBIOM), National Research Council-CNR, Via Amendola 122/O, 70126 Bari, Italy
| | - Jenny Schelin
- Division of Applied Microbiology, Department of Chemistry, Lund University, 22100 Lund, Sweden
| | - Ulf J Nilsson
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Ulf Ellervik
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
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2
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Rota P, La Rocca P, Allevi P, Pappone C, Anastasia L. Intramolecular Lactones of Sialic Acids. Int J Mol Sci 2020; 21:E8098. [PMID: 33143039 PMCID: PMC7663150 DOI: 10.3390/ijms21218098] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 10/27/2020] [Accepted: 10/28/2020] [Indexed: 12/22/2022] Open
Abstract
The so-called "sialo-chemical-biology" has become an attractive research area, as an increasing number of natural products containing a sialic acid moiety have been shown to play important roles in biological, pathological, and immunological processes. The intramolecular lactones of sialic acids are a subclass from this crucial family that could have central functions in the discrimination of physiological and pathological conditions. In this review, we report an in-depth analysis of the synthetic achievements in the preparation of the intramolecular lactones of sialic acids (1,4-, 1,7- and γ-lactones), in their free and/or protected form. In particular, recent advances in the synthesis of the 1,7-lactones have allowed the preparation of key sialic acid derivatives. These compounds could be used as authentic reference standards for their correct determination in biological samples, thus overcoming some of the limitations of the previous analytical procedures.
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Affiliation(s)
- Paola Rota
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, 20133 Milan, Italy;
| | - Paolo La Rocca
- Department of Biomedical Sciences for Health, University of Milan, 20133 Milan, Italy;
| | - Pietro Allevi
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, 20133 Milan, Italy;
| | - Carlo Pappone
- Arrhythmology Department, IRCCS Policlinico San Donato, 20097 San Donato Milanese, Milan, Italy;
- Faculty of Medicine, University of Vita-Salute San Raffaele, 20132 Milan, Italy
| | - Luigi Anastasia
- Faculty of Medicine, University of Vita-Salute San Raffaele, 20132 Milan, Italy
- Laboratory of Stem Cells for Tissue Engineering, IRCCS Policlinico San Donato, 20097 San Donato Milanese, Milan, Italy
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3
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Escopy S, Singh Y, Demchenko AV. Triflic acid-mediated synthesis of thioglycosides. Org Biomol Chem 2019; 17:8379-8383. [PMID: 31490529 DOI: 10.1039/c9ob01610d] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An efficient synthesis of thioglycosides from per-acetates in the presence of triflic acid is described. The developed protocol features high reaction rates and product yields. Some reactive sugar series give high efficiency in the presence of sub-stoichiometric trifluoromethanesulfonic acid (TfOH) in contrast to other known protocols that require multiple equivalents of Lewis acids to reach high conversion rates.
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Affiliation(s)
- Samira Escopy
- Department of Chemistry and Biochemistry, University of Missouri - St. Louis, One University Boulevard, St. Louis, Missouri 63121, USA.
| | - Yashapal Singh
- Department of Chemistry and Biochemistry, University of Missouri - St. Louis, One University Boulevard, St. Louis, Missouri 63121, USA.
| | - Alexei V Demchenko
- Department of Chemistry and Biochemistry, University of Missouri - St. Louis, One University Boulevard, St. Louis, Missouri 63121, USA.
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4
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Abstract
Investigations of methodologies aimed on improving the stereoselective synthesis of sialosides and the efficient assembly of sialic acid glycoconjugates has been the mission of dedicated research groups from the late 1960s. This review presents major accomplishments in the field, with the emphasis on significant breakthroughs and influential synthetic strategies of the last decade.
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5
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Escopy S, Geringer SA, De Meo C. Combined Effect of the Picoloyl Protecting Group and Triflic Acid in Sialylation. Org Lett 2017; 19:2638-2641. [DOI: 10.1021/acs.orglett.7b00976] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Samira Escopy
- Department of Chemistry, Southern Illinois University Edwardsville, Edwardsville, Illinois 62026, United States
| | - Scott A. Geringer
- Department of Chemistry, Southern Illinois University Edwardsville, Edwardsville, Illinois 62026, United States
| | - Cristina De Meo
- Department of Chemistry, Southern Illinois University Edwardsville, Edwardsville, Illinois 62026, United States
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6
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Hollinger M, Abraha F, Oscarson S. Synthesis of mucin O-glycan core structures as their p-nitro- and p-aminophenyl glycosides. Carbohydr Res 2011; 346:1454-66. [DOI: 10.1016/j.carres.2011.03.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Revised: 03/23/2011] [Accepted: 03/26/2011] [Indexed: 10/18/2022]
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7
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Permanganate Oxidation Revisited: Synthesis of 3-Deoxy-2-uloses via Indium-Mediated Chain Elongation of Carbohydrates. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000623] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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8
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Li Y, Yang X, Liu Y, Zhu C, Yang Y, Yu B. Gold(I)-Catalyzed Glycosylation with Glycosylortho-Alkynylbenzoates as Donors: General Scope and Application in the Synthesis of a Cyclic Triterpene Saponin. Chemistry 2010; 16:1871-82. [DOI: 10.1002/chem.200902548] [Citation(s) in RCA: 181] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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9
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Hanashima S, Tomiya T, Ishikawa D, Akai S, Sato KI. Sialylation using N-glycolylneuraminyl phosphite donors to synthesize Neu5Gc-containing glycans. Carbohydr Res 2009; 344:959-65. [PMID: 19358980 DOI: 10.1016/j.carres.2009.03.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2009] [Revised: 03/04/2009] [Accepted: 03/05/2009] [Indexed: 10/21/2022]
Abstract
Efficient sialylations using N-glycolylneuraminic acid (Neu5Gc) phosphite donors having an acetyl or benzyl group on the glycolyl moiety are described in the synthesis of Neu5Gc-containing glycans. Both phosphite donors 1 and 2 were readily coupled with primary and secondary acceptor alcohols in propionitrile at -78 degrees C to provide the desired glycosides with good alpha-selectivities.
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Affiliation(s)
- Shinya Hanashima
- Material and Life Chemistry, Faculty of Engineering, Kanagawa University, Yokohama, Japan
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10
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Kononov LO, Malysheva NN, Orlova AV. Stereoselectivity of Glycosylation May Change During the Reaction Course: Highly α-Stereoselective Sialylation Achieved by Supramer Approach. European J Org Chem 2009. [DOI: 10.1002/ejoc.200801017] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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11
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Kononov LO, Malysheva NN, Kononova EG, Orlova AV. Intermolecular Hydrogen‐Bonding Pattern of a Glycosyl Donor: The Key to Understanding the Outcome of Sialylation. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800324] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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12
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Horn EJ, Saludes JP, Gervay-Hague J. Investigation into an efficient synthesis of 2,3-dehydro-N-acetyl neuraminic acid leads to three decarboxylated sialic acid dimers. Carbohydr Res 2008; 343:936-40. [DOI: 10.1016/j.carres.2008.01.033] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2007] [Revised: 01/19/2008] [Accepted: 01/24/2008] [Indexed: 11/29/2022]
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13
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Tanaka S, Goi T, Tanaka K, Fukase K. Highly Efficient α‐Sialylation by Virtue of Fixed Dipole Effects ofN‐Phthalyl Group: Application to Continuous Flow Synthesis of α(2‐3)‐and α(2‐6)‐Neu5Ac‐Gal Motifs by Microreactor. J Carbohydr Chem 2007. [DOI: 10.1080/07328300701634796] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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14
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González Núñez F, Campos Valdes MT, Aruca E, Schmidt RR, Verez Bencomo V. Synthesis of Neoglycolipid Analogues of the Oligosaccharide Portion of Ganglioside GM3. J Carbohydr Chem 2006. [DOI: 10.1081/car-120025326] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Freya González Núñez
- a Center for the Study of Synthetic Antigens , Facultad de Química , Universidad de La Habana , Ciudad Habana, Cuba , 10400
| | - Maria T. Campos Valdes
- a Center for the Study of Synthetic Antigens , Facultad de Química , Universidad de La Habana , Ciudad Habana, Cuba , 10400
| | - Elsa Aruca
- a Center for the Study of Synthetic Antigens , Facultad de Química , Universidad de La Habana , Ciudad Habana, Cuba , 10400
| | | | - Vicente Verez Bencomo
- a Center for the Study of Synthetic Antigens , Facultad de Química , Universidad de La Habana , Ciudad Habana, Cuba , 10400
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15
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Abstract
Given the eminent threat of a 21st century flu pandemic, the search for novel antiviral compounds is an increasingly important area of research. Recent developments in antiviral research have established the viability of targeting viral neuraminidase (NA), an enzyme that cleaves sialic acid from the cell-surface-mediating passage of the virus in the respiratory tract. N-acetyl neuraminic acid (NeuAc) is the substrate for NA, and analogues of this core structure have been commercialized as antiviral therapeutics. Recent studies have established that this system is well suited for combinatorial approaches to drug discovery. An important step in the process is to develop solid-phase screening technologies. The feasibility of performing competitive solid-phase NA assays is reported herein. Initially, a fluorogenic NeuAc substrate was immobilized on solid support, and the ability of three NAs (Clostridium perfringens, Salmonella typhimurium, and Vibrio cholerae) to cleave the substrate was shown to be analogous to solution-phase assays. The solid support was then bifunctionalized with the fluorogenic NeuAc substrate and one of two known inhibitors (DANA and Zanamivir). The ability of NA to cleave NeuAc from the solid support when simultaneously presented with an inhibitor was shown to be enzyme dependent. As expected, simultaneous presentation of NeuAc and DANA, a nonspecific inhibitor, led to diminished activity for all three enzymes tested. In contrast, dual presentation of NeuAc and the selective inhibitor Zanamivir only showed significant activity against Vibrio cholerae.
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Affiliation(s)
- Laiqiang Ying
- Department of Chemistry, University of California, One Shields Ave, Davis, CA 95616, USA
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16
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Meijer A, Ellervik U. Study of interhalogens/silver trifluoromethanesulfonate as promoter systems for high-yielding sialylations. J Org Chem 2002; 67:7407-12. [PMID: 12375971 DOI: 10.1021/jo0262412] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have studied interhalogen/silver trifluoromethanesulfonate (IX/AgOTf) promoted glycosylations and found differences in the sensitivity of the formed oxocarbenium ions (e.g. from compounds with or without participating groups) toward halide nucleophiles. These differences can be explained using the HSAB theory. By applying this theory on sialylations, we increased the yield for a model reaction from a highly unpredictable 35-46% using ICl to 74% using IBr. We have also showed that the most prominent role of the silver ions is lowering the concentration of the halide nucleophile rather than activating the interhalogen compound and, by increasing the amount of AgOTf from 1 to 1.5 equiv (with respect to IBr), the yield in the model reaction improved from 74% to 89%. A comparison of two different anomeric leaving groups showed that glycal formation can be minimized using a thiophenyl donor instead of xanthate. By combining these observations, we were able to increase the yield of the model reaction to 97%.
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Affiliation(s)
- Andréas Meijer
- Organic and Bioorganic Chemistry, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
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17
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Affiliation(s)
- G J Boons
- Complex Carbohydrate Research Center, University of Georgia, Athens, Georgia 30602
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18
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Figueroa-Pérez S, Vérez-Bencomo V. Synthesis of a sialyl-alpha-(2-->6)-lactosamine trisaccharide with a 5-amino-3-oxapentyl spacer group at C-1I. Carbohydr Res 1999; 317:29-38. [PMID: 10466204 DOI: 10.1016/s0008-6215(99)00022-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
As part of a continuing study aimed to achieve improved monoclonal antibodies against carcinoembryonic antigen (CEA) carbohydrate fragments, the synthesis of a sialyl-(2-->6)-lactosamine trisaccharide with a 5-amino-3-oxapentyl spacer group at C-1I has been developed. Two different routes to access this target are described. For this purpose 5-azido-3-oxapentyl 6-O-benzyl-2-deoxy-2-phthalimido-beta-D-glucopyranoside (4) was selectively beta-galactosylated in 81% yield using the crystalline 2,3-di-O-acetyl-4,6-O-benzylidene-alpha-D-galactopyranosyl trichloroacetimidate as the donor, taking advantage of the bulky phthalimido group at C-2 of 4. On the other hand, galactosylation of the suitable protected acceptor 5-azido-3-oxapentyl 2-acetamido-3,6-di-O-benzyl-2-deoxy-beta-D-glucopyranoside with the crystalline 2,3-di-O-acetyl-4,6-O-benzylidene-alpha-D-galactosyl bromide renders the corresponding disaccharide in a moderate 58% yield. Despite the fact that the first strategy, unlike the second one, requires a hydrazinolysis-acetylation reaction at the disaccharide stage, it was found to be more convenient to access the disaccharide acceptor. Sialylation was performed using a thiophenyl donor under an NIS-TfOH activation procedure in acetonitrile to give a mixture of alpha and beta trisaccharides in 49 and 16% yields, respectively.
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Affiliation(s)
- S Figueroa-Pérez
- Laboratory of Synthetic Antigens, Facultad de Química, Universidad de La Habana, Havana, Cuba
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19
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Schauer R, Kamerling JP. Chemistry, biochemistry and biology of sialic acids ☆. NEW COMPREHENSIVE BIOCHEMISTRY 1997; 29. [PMCID: PMC7147860 DOI: 10.1016/s0167-7306(08)60624-9] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Roland Schauer
- Biochemisches Institut, Christian-Albrechls-Universität zu Kiel, Germany
| | - Johannis P. Kamerling
- Bijuoet Center, Department of Bio-Organic Chemistry, Utrecht University, The Netherlands
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20
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Mlynarski J, Banaszek A. A novel chemical synthesis of a 3-deoxy-d-arabino-heptulosonic acid 7-phosphate (DAHP) derivative and its 2-deoxy analogue. Carbohydr Res 1996. [DOI: 10.1016/s0008-6215(96)90122-6] [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]
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21
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Kosma P, Sekljic H, Balint G. Addition Reactions of Glycal Esters: Access to Glycosyl Donors of Kdo, d-glycero-d-talo- and d-glycero-d-galacto-2-Octulosonic Acid Residues. J Carbohydr Chem 1996. [DOI: 10.1080/07328309608005686] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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Dondoni A, Marra A, Rojo I, Scherrmann MC. Thiazolylketol acetates as glycosyl donors. Stereoselective synthesis of α-linked ketodisaccharides. Tetrahedron 1996. [DOI: 10.1016/0040-4020(95)01095-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Valverde S, Gómez AM, Cristóbal López J, Herradón B. Template directed cyclo-glycosylation: Effect of the anchoring sites of the spacer and temperature in the regio- and stereo-selectivity of the glycosylation. Tetrahedron Lett 1996. [DOI: 10.1016/0040-4039(95)02316-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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24
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Bandgar B, Patil S, Zbiral E. Synthesis of methyl 4-acetamido-N-acetyl-4-deoxy-α- and β-4-epi-neuraminic acids. Carbohydr Res 1995. [DOI: 10.1016/0008-6215(95)00191-u] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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26
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Wong CH, Halcomb RL, Ichikawa Y, Kajimoto T. Enzyme in der organischen Synthese: das Problem der molekularen Erkennung von Kohlenhydraten (Teil 2). Angew Chem Int Ed Engl 1995. [DOI: 10.1002/ange.19951070505] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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27
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Affiliation(s)
- S Aoki
- Department of Chemistry, Scripps Research Institute, La Jolla, California 92037
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28
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Roy R, Andersson FO, Letellier M. “Active” and “latent” thioglycosyl donors in oligosaccharide synthesis. Application to the synthesis of α-sialosides. Tetrahedron Lett 1992. [DOI: 10.1016/s0040-4039(00)60004-7] [Citation(s) in RCA: 117] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Lubineau A, Augé C, Bouxom B, Gautheron C. Synthesis of the Sialyloligosaccharide Gal-β(1→3)-[Neu5Ac-α(2→6)]-GalNAc, The Epitope of the Tumor-Associated Glycoprotein Tag 72. J Carbohydr Chem 1992. [DOI: 10.1080/07328309208016141] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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30
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Abstract
5-O-alpha-D-Glucopyranosyl-beta-D-fructopyranose (leucrose, 1) was transformed into 3,4-di-O-acetyl-1-O-methanesulfonyl-5-O-(2,3,4-tri-O-acetyl-6-O-methanes ulfonyl-alpha-D-glucopyranosyl)-beta-D-fructopyranosyl bromide (3) and 1,3,4-tri-O-benzoyl-5-O-(2,3,4,6-tetra-O-benzoyl-alpha-D-glucopyranosyl) -beta-D-fructopyranosyl bromide (8), which were converted into derivatives (8 and 9) of 2,6-anhydro-1-deoxy-5-O-alpha-D-glucopyranosyl-D-arabino-hex-1-enitol . Hydrogenation of 8 and 9 gave the corresponding anhydroalditol derivatives. N-Iodosuccinimide-mediated glycosylation of 9 with 1,2,3,4-tetra-O-acetyl-beta-D-glucopyranose gave 1,2,3,4-tetra-O-acetyl-6-O-[3,4-di-O-benzyl-1-deoxy-1-iodo-5-O-(2,3,4,6- tetra-O-benzoyl-alpha-D-glucopyranosyl)-beta-D-fructopyranosyl]- beta-D-glucopyranose (12). Some amino, acetylated, and isopropylidene derivatives of leucrose have been prepared and characterised.
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Affiliation(s)
- J Thiem
- Organisch-Chemisches Institut der Westfälischen Wilhelms-Universität, Münster, F.R.G
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31
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32
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A novel stereoselective synthesis of N-acetyl-α-neuraminosyl-galactose di-saccharide derivatives, using anomeric S-glycosyl xanthates. Carbohydr Res 1990. [DOI: 10.1016/0008-6215(90)84173-r] [Citation(s) in RCA: 87] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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33
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34
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Rothermel J, Faillard H. Phase-transfer-catalysed synthesis of N-acetylneuraminic acid alpha-thioketosides and inhibitor studies with Clostridium perfringens sialidase. BIOLOGICAL CHEMISTRY HOPPE-SEYLER 1989; 370:1077-84. [PMID: 2558681 DOI: 10.1515/bchm3.1989.370.2.1077] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The alpha-thioketosides of methyl 5-acetamido-4,7,8,9-tetra-O-acetylneuraminate with thioacetic acid, thiophenol, 4-nitrothiophenol, 4-aminothiophenol, 2-mercaptopyridin and mercaptobenzothiazol as aglycones were synthesized by phase-transfer catalysis in good yields. The methyl 5-acetamido-4,7,8,9-tetra-O-acetyl-2-thioacetylneuraminate is the analogous thio compound to the methyl 5-acetamido-2,4,7,8,9-penta-O-acetylneuraminate and can be used as intermediate for preparing S-ketosides of Neu5Ac. By Zemplen saponification and mild hydrolysis of the methyl-ester group the free Neu5Ac-alpha-thioketosides with thiophenol, 4-nitrothiophenol, 4-aminothiophenol and 2-mercaptopyridin could be prepared. These ketosides were found to be inhibitors of C. perfringens sialidase with Ki-values between 2.3mM and 6.6mM. The free Neu5Ac-alpha-mercaptobenzothiazolyl ketoside could not be prepared by this procedure. It was completely hydrolysed during Zemplen saponification and methyl-ester hydrolysis in alkaline medium.
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Valverde S, García-Ochoa S. Stereocontrolled Synthesis of Methyl (Methyl-5-Acetamido-4-O-Benzoyl-7-O-Benzyl-3,5-Dideoxy-α-D-Arabino-2-Heptulopyranosid)Onate, a Model Compound for Sialic Acids. J Carbohydr Chem 1989. [DOI: 10.1080/07328308908048016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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