1
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Fischer NH, Vævest BN, Dam AK, Diness F, Pedersen CM. Self-Promoted Glycosylation of Carbamoylated Peptides on Solid Phase. Chempluschem 2024; 89:e202400066. [PMID: 38523065 DOI: 10.1002/cplu.202400066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 03/18/2024] [Accepted: 03/19/2024] [Indexed: 03/26/2024]
Abstract
Self-promoted glycosylations with trichloroacetimidate glycosyl donors are demonstrated on solid-phase-anchored peptides orthogonally deprotected and tosylcarbamoylated on the side-chains of cysteine and serine, respectively. The donor scope included glucosyl as well as mannosyl trichloroacetimidates, carrying benzyl, acetyl, or isopropylidene protecting groups. Isopropylidene groups were found to be removed under the acidic conditions used for release of the neoglycopeptides from the solid support, yielding neoglycopeptides with unprotected hydroxyl groups. Glycosylation of a peptide containing a carbamoylated tyrosine was attempted as well, but the desired neoglycopeptide could not be synthesized due to thermal instability of the carbamate.
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Affiliation(s)
- Niklas H Fischer
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
| | - Benedicte N Vævest
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
| | - Andreas K Dam
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
| | - Frederik Diness
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
- Department of Science and Environment, Roskilde University, Universitetsvej 1, 4000, Roskilde, Denmark
| | - Christian M Pedersen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
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2
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Upadhyaya K, Osorio-Morales N, Crich D. Can Side-Chain Conformation and Glycosylation Selectivity of Hexopyranosyl Donors Be Controlled with a Dummy Ligand? J Org Chem 2023; 88:3678-3696. [PMID: 36877600 PMCID: PMC10028612 DOI: 10.1021/acs.joc.2c02889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
Abstract
The use of a phenylthio group (SPh) as a dummy ligand at the 6-position to control the side-chain conformation of a series of hexopyranosyl donors is described. The SPh group limits side-chain conformation in a configuration-specific manner, which parallels that seen in the heptopyranosides, and so influences glycosylation selectivity. With both d- and l-glycero-d-galacto-configured donors, the equatorial products are highly favored as they are with an l-glycero-d-gluco donor. For the d-glycero-d-gluco donor, on the other hand, modest axial selectivity is observed. Selectivity patterns are discussed in terms of the side-chain conformation of the donors in combination with the electron-withdrawing effect of the thioacetal group. After glycosylation, removal of the thiophenyl moiety and hydrogenolytic deprotection is achieved in a single step with Raney nickel.
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Affiliation(s)
- Kapil Upadhyaya
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States
| | - Nicolas Osorio-Morales
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States
- Department of Chemistry, University of Georgia, 302 East Campus Road, Athens, Georgia 30602, United States
| | - David Crich
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, Georgia 30602, United States
- Department of Chemistry, University of Georgia, 302 East Campus Road, Athens, Georgia 30602, United States
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, Georgia 30602, United States
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3
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Sommer K, Zollfrank C. Block Copolysaccharides from Methylated and Acetylated Cellulose and Starch. Biomacromolecules 2022; 23:2280-2289. [DOI: 10.1021/acs.biomac.1c01673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Korbinian Sommer
- Chair for Biogenic Polymers, TUM Campus Straubing for Biotechnology and Sustainability, Technical University of Munich, Schulgasse 16, Straubing 94315, Germany
| | - Cordt Zollfrank
- Chair for Biogenic Polymers, TUM Campus Straubing for Biotechnology and Sustainability, Technical University of Munich, Schulgasse 16, Straubing 94315, Germany
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4
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Juvin J, Malherbe V, Belhomme MC, Castex S, Martinez A, Khartabil H, Haudrechy A. A stereo-electronic interpretation of a challenging orthoamide Overman rearrangement rationalized by molecular modelling. NEW J CHEM 2022. [DOI: 10.1039/d2nj02468c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Overman rearrangement difficulties are tentatively explained using stereo-electronic considerations, helping chemists to understand their troubles in this process.
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Affiliation(s)
- Judith Juvin
- Institut de Chimie Moléculaire de Reims, UMR 7312, SFR Condorcet FR CNRS 3417, F-51687 REIMS Cedex, France
| | - Victor Malherbe
- Institut de Chimie Moléculaire de Reims, UMR 7312, SFR Condorcet FR CNRS 3417, F-51687 REIMS Cedex, France
| | - Marie-Charlotte Belhomme
- Institut de Chimie Moléculaire de Reims, UMR 7312, SFR Condorcet FR CNRS 3417, F-51687 REIMS Cedex, France
| | - Stéphanie Castex
- Institut de Chimie Moléculaire de Reims, UMR 7312, SFR Condorcet FR CNRS 3417, F-51687 REIMS Cedex, France
| | - Agathe Martinez
- Institut de Chimie Moléculaire de Reims, UMR 7312, SFR Condorcet FR CNRS 3417, F-51687 REIMS Cedex, France
| | - Hassan Khartabil
- Institut de Chimie Moléculaire de Reims, UMR 7312, SFR Condorcet FR CNRS 3417, F-51687 REIMS Cedex, France
| | - Arnaud Haudrechy
- Institut de Chimie Moléculaire de Reims, UMR 7312, SFR Condorcet FR CNRS 3417, F-51687 REIMS Cedex, France
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5
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Kowalska K, Pedersen CM. α-Selective glycosylations using glycosyl N-(ortho-methoxyphenyl)trifluoroacetimidates. Org Biomol Chem 2020; 18:1918-1925. [PMID: 32101221 DOI: 10.1039/c9ob02696g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Six N-(o-methoxyphenyl)trifluoroacetimidate glycosyl donors have been synthesized and their role as glycosyl donors has been investigated. The donors were synthesized with complete β-selectivity, except in one case, and were found to be stable. When Bi(OTf)3, Fe(OTf)2, and Zn(OTf)2 were employed as catalysts, the glycosylations were found to be highly α-selective in Et2O. The selectivity and reaction rate changed with a change in the acceptor reactivity.
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Affiliation(s)
- Karolina Kowalska
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark. and Faculty of Chemistry, Adam Mickiewicz University in Poznań, ul. Uniwersytetu Poznańskiego 8, 61-614 Poznań, Poland
| | - Christian Marcus Pedersen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark.
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6
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Medve L, Achilli S, Guzman‐Caldentey J, Thépaut M, Senaldi L, Le Roy A, Sattin S, Ebel C, Vivès C, Martin‐Santamaria S, Bernardi A, Fieschi F. Enhancing Potency and Selectivity of a DC-SIGN Glycomimetic Ligand by Fragment-Based Design: Structural Basis. Chemistry 2019; 25:14659-14668. [PMID: 31469191 PMCID: PMC6899773 DOI: 10.1002/chem.201903391] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 08/28/2019] [Indexed: 12/22/2022]
Abstract
Chemical modification of pseudo-dimannoside ligands guided by fragment-based design allowed for the exploitation of an ammonium-binding region in the vicinity of the mannose-binding site of DC-SIGN, leading to the synthesis of a glycomimetic antagonist (compound 16) of unprecedented affinity and selectivity against the related lectin langerin. Here, the computational design of pseudo-dimannoside derivatives as DC-SIGN ligands, their synthesis, their evaluation as DC-SIGN selective antagonists, the biophysical characterization of the DC-SIGN/16 complex, and the structural basis for the ligand activity are presented. On the way to the characterization of this ligand, an unusual bridging interaction within the crystals shed light on the plasticity and potential secondary binding sites within the DC-SIGN carbohydrate recognition domain.
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Affiliation(s)
- Laura Medve
- Dipartimento di ChimicaUniversità degli Studi di Milanovia Golgi 1920133MilanoItaly
| | - Silvia Achilli
- Université Grenoble AlpesCNRS, CEAInstitut de Biologie Structurale38044GrenobleFrance
| | - Joan Guzman‐Caldentey
- Department of Structural and Chemical Biology, Centro de Investigaciones BiologicasCIB-CSICC/Ramiro de Maeztu, 928040MadridSpain
| | - Michel Thépaut
- Université Grenoble AlpesCNRS, CEAInstitut de Biologie Structurale38044GrenobleFrance
| | - Luca Senaldi
- Dipartimento di ChimicaUniversità degli Studi di Milanovia Golgi 1920133MilanoItaly
| | - Aline Le Roy
- Université Grenoble AlpesCNRS, CEAInstitut de Biologie Structurale38044GrenobleFrance
| | - Sara Sattin
- Dipartimento di ChimicaUniversità degli Studi di Milanovia Golgi 1920133MilanoItaly
| | - Christine Ebel
- Université Grenoble AlpesCNRS, CEAInstitut de Biologie Structurale38044GrenobleFrance
| | - Corinne Vivès
- Université Grenoble AlpesCNRS, CEAInstitut de Biologie Structurale38044GrenobleFrance
| | - Sonsoles Martin‐Santamaria
- Department of Structural and Chemical Biology, Centro de Investigaciones BiologicasCIB-CSICC/Ramiro de Maeztu, 928040MadridSpain
| | - Anna Bernardi
- Dipartimento di ChimicaUniversità degli Studi di Milanovia Golgi 1920133MilanoItaly
| | - Franck Fieschi
- Université Grenoble AlpesCNRS, CEAInstitut de Biologie Structurale38044GrenobleFrance
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7
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Narumi A, Nakazawa T, Shinohara K, Kato H, Iwaki Y, Okimoto H, Kikuchi M, Kawaguchi S, Hino S, Ikeda A, Shaykoon MSA, Shen X, Duan Q, Kakuchi T, Yasuhara K, Nomoto A, Mikata Y, Yano S. C 60 Fullerene with Tetraethylene Glycols as a Well-defined Soluble Building Block and Saccharide-conjugation Producing PDT Photosensitizer. CHEM LETT 2019. [DOI: 10.1246/cl.190492] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Atsushi Narumi
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Tatsufumi Nakazawa
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Kosuke Shinohara
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Hiroki Kato
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Yoshinori Iwaki
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Haruya Okimoto
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Moriya Kikuchi
- Faculty of Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Seigou Kawaguchi
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan
| | - Shodai Hino
- Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan
| | - Atsushi Ikeda
- Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan
| | | | - Xiande Shen
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, P. R. China
| | - Qian Duan
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, P. R. China
| | - Toyoji Kakuchi
- School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, P. R. China
| | - Kazuma Yasuhara
- Division of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan
| | - Akihiro Nomoto
- Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Yuji Mikata
- KYOUSEI Science Center for Life and Nature, Nara Women’s University, Kitauohigashimachi, Nara 630-8506, Japan
| | - Shigenobu Yano
- KYOUSEI Science Center for Life and Nature, Nara Women’s University, Kitauohigashimachi, Nara 630-8506, Japan
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8
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Synthesis of the hexasaccharide from Trypanosoma cruzi mucins with the Galp(1 → 2)Galf unit constructed with a superarmed thiogalactopyranosyl donor. Carbohydr Res 2019; 482:107734. [PMID: 31271957 DOI: 10.1016/j.carres.2019.06.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 06/19/2019] [Accepted: 06/21/2019] [Indexed: 12/28/2022]
Abstract
Hexasaccharide β-D-Galp-(1→ 2)-[β-D-Galp-(1 → 3)]-β-D-Galp-(1 → 6)-[β-D-Galp-(1 → 2)-β-D-Galf-(1 → 4)]-D-GlcNAc (1) was found O-linked in mucins of Trypanosoma cruzi epimastigotes and metacyclic trypomatigotes. Studies on the biological pathways and functionalities of the mucin oligosaccharides are prompted in order to understand the interactions of these molecules with the insect host. Trisaccharide constituent β-D-Galp-(1 → 2)-β-D-Galf-(1 → 4)-D-GlcNAc was constructed from the reducing to the non-reducing end. We discuss the difficulties to introduce a Galp unit at the O-2 position of a partially protected galactofuranosyl unit which were overcome using an anchimerically superarmed donor. By this route and employing a [3 + 3] nitrilium convergent approach hexasaccharide 1 was synthesized in moderate yield.
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9
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Nielsen MM, Mała P, Baldursson EÞ, Pedersen CM. Self-promoted and stereospecific formation of N-glycosides. Chem Sci 2019; 10:5299-5307. [PMID: 31191886 PMCID: PMC6540880 DOI: 10.1039/c9sc00857h] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 04/15/2019] [Indexed: 12/20/2022] Open
Abstract
A stereoselective and self-promoted glycosylation for the synthesis of various N-glycosides and glycosyl sulfonamides from trichloroacetimidates is presented.
A stereoselective and self-promoted glycosylation for the synthesis of various N-glycosides and glycosyl sulfonamides from trichloroacetimidates is presented. No additional catalysts or promoters are needed in what is essentially a two-component reaction. When α-glucosyl trichloroacetimidates are employed, the reaction resulted in the stereospecific formation of the corresponding β-N-glucosides in high yields at ambient conditions. On the other hand, when equatorial glucosyl donors were used, the stereospecificity decreased and resulted in a mixture of anomers. By NMR-studies, it was concluded that this decrease in stereospecificity was due to an, until now, unpresented anomerization of the trichloroacetimidate under the very mildly acidic conditions. The mechanism and kinetics of the glycosylations have been studied by NMR-experiments, which gave an insight into the activation of trichloroacetimidates, suggesting an SNi-like mechanism involving ion pairs. The scope of glycosyl donors and sulfonamides was found to be very broad including popular N-protective groups and common glycosyl donors of various reactivity. Peracetylated GlcNAc trichloroacetimidate could be used without the need for any promotors or additives and a tyrosine side chain was glycosylated as an N-glycosyl carbamate. The N-carbamates and the N-sulfonyl groups functioned as orthogonal protective groups of the N-glycoside and hence allowed further N-functionalization without risking mutarotation of the N-glycoside. The N-glycosylation was also performed on a gram scale, without a drop in stereoselectivity nor yield.
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Affiliation(s)
- Michael Martin Nielsen
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , 2100 Copenhagen O , Denmark .
| | - Patrycja Mała
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , 2100 Copenhagen O , Denmark . .,Faculty of Chemistry , Adam Mickiewicz University , Umultowska 89b , 61614 Poznań , Poland
| | - Eirikur Þórir Baldursson
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , 2100 Copenhagen O , Denmark .
| | - Christian Marcus Pedersen
- Department of Chemistry , University of Copenhagen , Universitetsparken 5 , 2100 Copenhagen O , Denmark .
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10
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Stereoselective trimethylsilylation of α- and β-galactopyranoses. Carbohydr Res 2019; 474:51-56. [PMID: 30731331 DOI: 10.1016/j.carres.2019.01.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 01/28/2019] [Accepted: 01/28/2019] [Indexed: 11/22/2022]
Abstract
Trimethylsilylation of the anomeric hydroxyl groups of tetra-O-benzyl and tetra-O-acetyl galactopyranoses was investigated. Stereoselective formation of β-trimethylsilyl glycoside (β-TMS glycoside) of benzyl protected compound was achieved using N-trimethylsilyl diethylamine. In the course of the investigation of the selective synthesis of TMS galactosides using TMS-imidazole, we observed the formation of an intermediate, which was converted predominantly into α-TMS glycoside after silica gel column chromatography. A reaction of acetylated compound using TMS-trifluoromethanesulfonate-2,6-lutindine selectively yielded α-TMS glycoside.
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11
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Chen HM, Withers SG. Synthesis of azido-deoxy and amino-deoxy glycosides and glycosyl fluorides for screening of glycosidase libraries and assembly of substituted glycosides. Carbohydr Res 2018; 467:33-44. [DOI: 10.1016/j.carres.2018.07.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 07/13/2018] [Accepted: 07/16/2018] [Indexed: 10/28/2022]
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12
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Affiliation(s)
- Michael Martin Nielsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
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13
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Chaudhury A, Mukherjee MM, Ghosh R. Synthetic avenues towards a tetrasaccharide related to Streptococcus pneumonia of serotype 6A. Beilstein J Org Chem 2018; 14:1095-1102. [PMID: 29977381 PMCID: PMC6009338 DOI: 10.3762/bjoc.14.95] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 04/26/2018] [Indexed: 11/23/2022] Open
Abstract
Streptococcus pneumonia (SPn) is a Gram-positive bacterium which causes life threatening diseases. The bacteria protect themselves against non-specific host defence by an external polysaccharide (PS) capsule which bears a repeating unit, α-D-Galp(1->3)-α-D-Glcp(1->3)-α-L-Rhap(1->3)-D-Rib (SPn 6A). A closer look at the structure reveals the presence of α-linked galactose and glucose residues. The synthesis of these 1,2-cis glycosidic linkages are considered challenging particularly in the context of a one-pot oligosaccharide synthesis. We have synthesized the aforesaid tetrasaccharide (SPn 6A) based on both stepwise and sequential one-pot glycosylation reactions using easily accessible common building blocks; eventually similar overall yields were obtained in both cases.
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Affiliation(s)
- Aritra Chaudhury
- Department of Chemistry, Jadavpur University, 188, Raja S. C. Mullick Rd., Kolkata 700032, India.,Department of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur, 741246, West Bengal, India
| | - Mana Mohan Mukherjee
- Department of Chemistry, Jadavpur University, 188, Raja S. C. Mullick Rd., Kolkata 700032, India.,present addrress: Laboratory of Bioorganic Chemistry, NIH, NIDDK, Bethesda, MD, USA
| | - Rina Ghosh
- Department of Chemistry, Jadavpur University, 188, Raja S. C. Mullick Rd., Kolkata 700032, India
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14
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Concise Synthesis of the Phosphoglycerylated Tetrasaccharide Repeating Unit of the Capsular Polysaccharide ofStreptococcus pneumoniaeSerotype 11 A. ChemistrySelect 2017. [DOI: 10.1002/slct.201702500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Angles d’Ortoli T, Hamark C, Widmalm G. Structure–Reactivity Relationships of Conformationally Armed Disaccharide Donors and Their Use in the Synthesis of a Hexasaccharide Related to the Capsular Polysaccharide from Streptococcus pneumoniae Type 37. J Org Chem 2017; 82:8123-8140. [DOI: 10.1021/acs.joc.7b01264] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Thibault Angles d’Ortoli
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden
| | - Christoffer Hamark
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden
| | - Göran Widmalm
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden
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16
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Verkhnyatskaya SA, Krylov VB, Nifantiev NE. Pyranoside-into-Furanoside Rearrangement of 4-Pentenyl Glycosides in the Synthesis of a Tetrasaccharide-Related to Galactan I ofKlebsiella pneumoniae. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601413] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Stella A. Verkhnyatskaya
- Laboratory of Glycoconjugate Chemistry; N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; Leninsky prospect 47 119991 Moscow Russian Federation
| | - Vadim B. Krylov
- Laboratory of Glycoconjugate Chemistry; N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; Leninsky prospect 47 119991 Moscow Russian Federation
| | - Nikolay E. Nifantiev
- Laboratory of Glycoconjugate Chemistry; N. D. Zelinsky Institute of Organic Chemistry; Russian Academy of Sciences; Leninsky prospect 47 119991 Moscow Russian Federation
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17
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Abstract
Glycosylation using Tf2NH or Tf2NTMS as the catalysts and a trichloroacetimidate donor gives glycosides with inverted anomeric stereochemistry.
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Affiliation(s)
- K. Kowalska
- Department of Chemistry
- University of Copenhagen
- Universitetsparken 5
- DK-2100 Copenhagen
- Denmark
| | - C. M. Pedersen
- Department of Chemistry
- University of Copenhagen
- Universitetsparken 5
- DK-2100 Copenhagen
- Denmark
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18
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Affiliation(s)
- Yonglian Zhang
- Department of Chemistry & Chemical Biology, Rutgers The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
| | - Spencer Knapp
- Department of Chemistry & Chemical Biology, Rutgers The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854, United States
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19
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Angles d'Ortoli T, Widmalm G. Synthesis of the tetrasaccharide glycoside moiety of Solaradixine and rapid NMR-based structure verification using the program CASPER. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.12.042] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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20
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Chand HR, Bhattacharya AK. Diastereoselective Synthesis of β-Ether Derivatives of Artemisinin, an Antimalarial Drug: The Effect of Nitrile on Stereoselectivity. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500415] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hemender R. Chand
- Division of Organic Chemistry; CSIR-National Chemical Laboratory (CSIR-NCL); Dr. Homi Bhabha Road Pune- 411 008 India
| | - Asish K. Bhattacharya
- Division of Organic Chemistry; CSIR-National Chemical Laboratory (CSIR-NCL); Dr. Homi Bhabha Road Pune- 411 008 India
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21
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Thorsheim K, Siegbahn A, Johnsson RE, Stålbrand H, Manner S, Widmalm G, Ellervik U. Chemistry of xylopyranosides. Carbohydr Res 2015; 418:65-88. [PMID: 26580709 DOI: 10.1016/j.carres.2015.10.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 10/09/2015] [Accepted: 10/10/2015] [Indexed: 12/22/2022]
Abstract
Xylose is one of the few monosaccharidic building blocks that are used by mammalian cells. In comparison with other monosaccharides, xylose is rather unusual and, so far, only found in two different mammalian structures, i.e. in the Notch receptor and as the linker between protein and glycosaminoglycan (GAG) chains in proteoglycans. Interestingly, simple soluble xylopyranosides can not only initiate the biosynthesis of soluble GAG chains but also function as inhibitors of important enzymes in the biosynthesis of proteoglycans. Furthermore, xylose is a major constituent of hemicellulosic xylans and thus one of the most abundant carbohydrates on Earth. Altogether, this has spurred a strong interest in xylose chemistry. The scope of this review is to describe synthesis of xylopyranosyl donors, as well as protective group chemistry, modifications, and conformational analysis of xylose.
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Affiliation(s)
- Karin Thorsheim
- Centre for Analysis and Synthesis, Centre for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Anna Siegbahn
- Centre for Analysis and Synthesis, Centre for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Richard E Johnsson
- Centre for Analysis and Synthesis, Centre for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Henrik Stålbrand
- Centre for Molecular Protein Science, Centre for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Sophie Manner
- Centre for Analysis and Synthesis, Centre for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Göran Widmalm
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Ulf Ellervik
- Centre for Analysis and Synthesis, Centre for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden.
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22
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Adero PO, Furukawa T, Huang M, Mukherjee D, Retailleau P, Bohé L, Crich D. Cation Clock Reactions for the Determination of Relative Reaction Kinetics in Glycosylation Reactions: Applications to Gluco- and Mannopyranosyl Sulfoxide and Trichloroacetimidate Type Donors. J Am Chem Soc 2015; 137:10336-45. [PMID: 26207807 PMCID: PMC4545385 DOI: 10.1021/jacs.5b06126] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The development of a cation clock method based on the intramolecular Sakurai reaction for probing the concentration dependence of the nucleophile in glycosylation reactions is described. The method is developed for the sulfoxide and trichloroacetimidate glycosylation protocols. The method reveals that O-glycosylation reactions have stronger concentration dependencies than C-glycosylation reactions consistent with a more associative, S(N)2-like character. For the 4,6-O-benzylidene-directed mannosylation reaction a significant difference in concentration dependence is found for the formation of the β- and α-anomers, suggesting a difference in mechanism and a rationale for the optimization of selectivity regardless of the type of donor employed. In the mannose series the cyclization reaction employed as clock results in the formation of cis and trans-fused oxabicyclo[4,4,0]decanes as products with the latter being strongly indicative of the involvement of a conformationally mobile transient glycosyl oxocarbenium ion. With identical protecting group arrays cyclization in the glucopyranose series is more rapid than in the mannopyranose manifold. The potential application of related clock reactions in other carbenium ion-based branches of organic synthesis is considered.
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Affiliation(s)
- Philip O. Adero
- Department of Chemistry, Wayne State University, 5101 Cass Avenue Detroit, MI 48202, USA
| | - Takayuki Furukawa
- Department of Chemistry, Wayne State University, 5101 Cass Avenue Detroit, MI 48202, USA
| | - Min Huang
- Institut de Chimie des Substances Naturelles, CNRS-ICSN UPR2301, Université Paris-Sud, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Debaraj Mukherjee
- Department of Chemistry, Wayne State University, 5101 Cass Avenue Detroit, MI 48202, USA
| | - Pascal Retailleau
- Institut de Chimie des Substances Naturelles, CNRS-ICSN UPR2301, Université Paris-Sud, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - Luis Bohé
- Institut de Chimie des Substances Naturelles, CNRS-ICSN UPR2301, Université Paris-Sud, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France
| | - David Crich
- Department of Chemistry, Wayne State University, 5101 Cass Avenue Detroit, MI 48202, USA
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23
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Le Chevalier Isaad A, Carrara P, Stano P, Krishnakumar KS, Lafont D, Zamboulis A, Buchet R, Bouchu D, Albrieux F, Strazewski P. A hydrophobic disordered peptide spontaneously anchors a covalently bound RNA hairpin to giant lipidic vesicles. Org Biomol Chem 2015; 12:6363-73. [PMID: 24915577 DOI: 10.1039/c4ob00721b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The attraction of nucleic acids to lipidic compartments is the first step for carriers of potentially inheritable information to self-organise in functionalised synthetic cells. Confocal fluorescence imaging shows that a synthetic amphiphilic peptidyl RNA molecule spontaneously accumulates at the outer bilayer membranes of phospho- and glycolipidic giant vesicles. Cooperatively attractive interactions of -3.4 to -4.0 kcal mol(-1) between a random coil hydrophobic peptide and lipid membranes can thus pilot lipophobic RNA to its compartmentation. The separation of mixed lipid phases in the membranes further enhances the local concentration of anchored RNA.
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Affiliation(s)
- Alexandra Le Chevalier Isaad
- Institut de Chimie et Biochimie Moléculaires et Supramoléculaires (Unité Mixte de Recherche 5246), Université de Lyon, Claude Bernard Lyon 1, 69622 Villeurbanne Cedex, Lyon, France.
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24
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Christensen HM, Oscarson S, Jensen HH. Common side reactions of the glycosyl donor in chemical glycosylation. Carbohydr Res 2015; 408:51-95. [DOI: 10.1016/j.carres.2015.02.007] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 02/12/2015] [Accepted: 02/18/2015] [Indexed: 12/13/2022]
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25
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Fukuda K, Tojino M, Goto K, Dohi H, Nishida Y, Mizuno M. A recyclable heavy fluorous tag carrying an allyl alcohol pendant group: design and evaluation toward applications in synthetic carbohydrate chemistry. Carbohydr Res 2015; 407:122-30. [DOI: 10.1016/j.carres.2015.02.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 02/02/2015] [Accepted: 02/07/2015] [Indexed: 10/24/2022]
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26
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Liu D, Sarrafpour S, Guo W, Goulart B, Bennett CS. Matched/Mismatched Interactions in Chiral Brønsted Acid-Catalyzed Glycosylation Reactions with 2-Deoxy-Sugar Trichloroacetimidate Donors. J Carbohydr Chem 2014. [DOI: 10.1080/07328303.2014.927882] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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27
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Pett C, Westerlind U. A convergent strategy for the synthesis of type-1 elongated mucin cores 1-3 and the corresponding glycopeptides. Chemistry 2014; 20:7287-99. [PMID: 24842272 DOI: 10.1002/chem.201400162] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Indexed: 01/08/2023]
Abstract
Mucins are a class of highly O-glycosylated proteins found on the surface of cells in epithelial tissues. O-Glycosylation is crucial for the functionality of mucins and changes therein can have severe consequences for an organism. With that in mind, the elucidation of interactions of carbohydrate binding proteins with mucins, whether in morbidly altered or unaltered conditions, continue to shed light on mechanisms involved in diseases like chronic inflammations and cancer. Despite the known importance of type-1 and type-2 elongated mucin cores 1-4 in glycobiology, the corresponding type-1 structures are much less well studied. Here, the first chemical synthesis of extended mucin type-1 O-glycan core 1-3 amino acid structures based on a convergent approach is presented. By utilizing differentiation in acceptor reactivity, shared early stage Tn- and T-acceptor intermediates were elongated with a common type-1 [β-D-Gal-1,3-β-D-GlcNAc] disaccharide, which allows for straightforward preparation of diverse glycosylated amino acids carrying the type-1 mucin core 1-3 saccharides. The obtained glycosylated 9-fluorenylmethoxycarbonyl (Fmoc)-protected amino acid building blocks were employed in synthesis of type-1 mucin glycopeptides, which are useful in biological applications.
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Affiliation(s)
- Christian Pett
- Gesellschaft zur Förderung der Analytischen Wissenschaften e.V. ISAS, Leibniz Institute for Analytical Sciences, Otto-Hahn-Str. 6b, 44227 Dortmund (Germany)
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28
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Han Z, Achilonu MC, Kendrekar PS, Joubert E, Ferreira D, Bonnet SL, van der Westhuizen JH. Concise and scalable synthesis of aspalathin, a powerful plasma sugar-lowering natural product. JOURNAL OF NATURAL PRODUCTS 2014; 77:583-588. [PMID: 24354397 DOI: 10.1021/np4008443] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Aspalathin (1), a dihydrochalcone C-glucoside, exhibits powerful plasma sugar-lowering properties and thus potentially could be used to treat diabetes. Small quantities occur in rooibos tea, manufactured via fermentation of the leaves of Aspalathus linearis, hence necessitating the need for an efficient and concise synthesis. Efforts to synthesize aspalathin (1) via coupling of a glucose donor to the nucleophilic phloroglucinol ring of the dihydrochalcone moiety have invariably failed, presumably because of ring deactivation by the electron-withdrawing carbonyl group. Reduction of the carbonyl group of a chalcone (15) and coupling of the resulting 1,3-diarylpropane (16) to tetra-O-benzyl-β-D-glucopyranose afforded the C-glucosyl-1,3-diarylpropane (17). Regiospecific benzylic oxidation regenerated the carbonyl group and afforded the per-O-methylaspalathin (1a) quantitatively. This method was not successful with the per-O-benzyl-protected dihydrochalcone. However, the nucleophilicity of the phenolic hydroxy groups of the dihydrochalcone or its acetophenone precursor is not diminished by the carbonyl group. Thus, glucosylation of the di-O-benzylacetophenone (5c) at -40 °C afforded the α-O-glucoside (19) in 86% yield. Raising the temperature allowed facile BF3-catalyzed rearrangement to the β-C-glucoside (6b), which upon hydrogenation, afforded aspalathin (1) in 80% overall yield [based on the usage of di-O-benzylphloroacetophenone (5c) and tetra-O-benzyl-1α-fluoro-β-D-glucose (2e)].
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Affiliation(s)
- Ze Han
- Department of Chemistry, University of the Free State , Nelson Mandela Avenue, Bloemfontein, 9301, South Africa
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29
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Morelli L, Bernardi A, Sattin S. Synthesis of potential allosteric modulators of Hsp90 by chemical glycosylation of Eupomatenoid-6. Carbohydr Res 2014; 390:33-41. [PMID: 24690674 DOI: 10.1016/j.carres.2014.03.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 03/04/2014] [Accepted: 03/05/2014] [Indexed: 10/25/2022]
Abstract
Hsp90 (Heat shock protein-90) is a chaperone protein and an established anti-apoptotic target in cancer therapy. Most of the known small-molecule inhibitors that have shown potent antitumor activity target the Hsp90 N-terminal domain and directly inhibit its ATP-ase activity. Many of these molecules display important secondary effects. A different approach to Hsp90 inhibition consists of targeting the protein C-terminal domain (CTD) and modulating its chaperone activity through allosteric effects. Using an original computational approach, allosteric hot-spots in the CTD have been recently identified that control interdomain communication. A combination of virtual and experimental screening enabled identification of a rhamnosylated benzofuran (Eupomatenoid-2) as a lead for further development. In this paper we describe glycodiversification of Eupomatenoid-2 using chemical glycosylation of the 2-(4'-hydroxyphenyl)benzofuran aglycon (a.k.a. Eupomatenoid-6). Glycosylation of the phenol by glycosyl bromides under basic conditions afforded the desired products in the gluco-, galacto-, and fuco-series. This approach failed in the manno- and rhamno-series. However, mannosylation and rhamnosylation of Eupomatenoid-6 could be obtained under carefully controlled acidic conditions, using O-benzoxazolyl imidate (OBox) donors. The glycosides obtained are currently under investigation as modulators of Hsp90 chaperone activity.
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Affiliation(s)
- Laura Morelli
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy
| | - Anna Bernardi
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy
| | - Sara Sattin
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy.
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30
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Kozma A, Deden T, Carreras J, Wille C, Petuškova J, Rust J, Alcarazo M. Coordination chemistry of cyclopropenylidene-stabilized phosphenium cations: synthesis and reactivity of Pd and Pt complexes. Chemistry 2014; 20:2208-14. [PMID: 24459090 DOI: 10.1002/chem.201303686] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Indexed: 11/09/2022]
Abstract
A straightforward synthesis of cyclopropenylidene-stabilized phosphenium cations 1 a-g through the reaction of [(iPr2N)2C3(+)Cl]BF4 with secondary phosphines is described. Their donor ability was evaluated by analysis of the CO stretching frequency in Rh complexes [RhCl(CO)L2](BF4)2 and electrochemical methods. The cyclopropenium ring induces a phosphite-type behavior that can be tuned by the other two substituents attached to the phosphorus atom. Despite of the positive charge that they bear, phosphenium cations 1 a-g still act as two-electron donor ligands, forming adducts with Pd(II) and Pt(II) precursors. Conversely, in the presence of Pd(0) species, an oxidative insertion of the Pd atom into the Ccarbene-phosphorus bond takes place, providing dimeric structures in which each Pd atom is bonded to a cyclopropenyl carbene while two dialkyl/diaryl phosphide ligands serve as bridges between the two Pd centers. The catalytic performance of the resulting library of Pt(II) complexes was tested; all of the cationic phosphines accelerated the prototype 6-endo-dig cyclization of 2-ethynyl-1,1'-biphenyl to afford pentahelicene. The best ligand 1 g was used in the synthesis of two natural products, chrysotoxene and epimedoicarisoside A.
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Affiliation(s)
- Agnes Kozma
- Max-Planck-Institut für Kohlenforschung, Kaiser Wilhelm Platz 1, 45470-Mülheim an der Ruhr (Germany), Fax: (+49) 208-306-2994
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31
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Clayton E, Hattie M, Debowski AW, Stubbs KA. Synthesis of Carbohydrate-based Natural Products from Leonurus japonicus and their Biological Evaluation as Anti-oxidants. Aust J Chem 2014. [DOI: 10.1071/ch13621] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Natural products are important materials that have found a wide variety of uses, especially in medicine. Traditional Chinese medicine (TCM) has especially taken advantage of natural products and compounds found in Leonurus, a species of herb used extensively in TCM to treat various ailments. Herein we describe the synthesis of three natural products from Leonurus japonicus and our investigation of their hepatoprotective properties.
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32
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Gola G, Gallo-Rodriguez C. Synthesis of α-d-Glcp-(1→3)-α-d-Galf-(1→2)-α-l-Rhap constituent of the CPS of Streptococcus pneumoniae 22F. Effect of 3-O-substitution in 1,2-cis α-d-galactofuranosylation. RSC Adv 2014. [DOI: 10.1039/c3ra45658g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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33
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Wang S, Lafont D, Rahkila J, Picod B, Leino R, Vidal S. Glycosylation of ‘basic’ alcohols: methyl 6-(hydroxymethyl)picolinate as a case study. Carbohydr Res 2013; 372:35-46. [DOI: 10.1016/j.carres.2013.02.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 02/14/2013] [Accepted: 02/15/2013] [Indexed: 11/28/2022]
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34
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Reddy CR, Jithender E, Prasad KR. Total Syntheses of the Proposed Structure for Ieodoglucomides A and B. J Org Chem 2013; 78:4251-60. [DOI: 10.1021/jo400041p] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chada Raji Reddy
- Division
of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad
500007, India
| | - Enukonda Jithender
- Division
of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad
500007, India
| | - Kothakonda Rajendra Prasad
- Division
of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad
500007, India
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35
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Guchhait G, Misra AK. Short synthesis of the common trisaccharide core of kankanose and kankanoside isolated from Cistanche tubulosa. Beilstein J Org Chem 2013; 9:705-9. [PMID: 23766782 PMCID: PMC3678509 DOI: 10.3762/bjoc.9.80] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 03/20/2013] [Indexed: 11/23/2022] Open
Abstract
A short synthetic approach was developed for the synthesis of a common trisaccharide core found in kankanose, kankanoside F, H1, H2, and I isolated from the medicinally active plant Cistanche tubulosa. All glycosylations were carried out under nonmetallic reaction conditions. Yields were very good in all intermediate steps.
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Affiliation(s)
- Goutam Guchhait
- Bose Institute, Division of Molecular Medicine, P-1/12, C.I.T. Scheme VII M, Kolkata 700054, India
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36
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Szechner B, Furman B, Chmielewski M. Glycosyl hydroperoxides. Carbohydr Res 2013; 369:54-7. [DOI: 10.1016/j.carres.2012.12.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 12/29/2012] [Accepted: 12/31/2012] [Indexed: 10/27/2022]
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37
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Brand C, Kettelhoit K, Werz DB. Glycosylations of Cyclopropyl-Modified Carbohydrates: Remarkable β-Selectivity Using a Mannose Building Block. Org Lett 2012; 14:5126-9. [DOI: 10.1021/ol3024133] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christian Brand
- Institut für Organische und Biomolekulare Chemie der Georg-August-Universität Göttingen, Tammannstr. 2, D-37077 Göttingen, Germany
| | - Katharina Kettelhoit
- Institut für Organische und Biomolekulare Chemie der Georg-August-Universität Göttingen, Tammannstr. 2, D-37077 Göttingen, Germany
| | - Daniel B. Werz
- Institut für Organische und Biomolekulare Chemie der Georg-August-Universität Göttingen, Tammannstr. 2, D-37077 Göttingen, Germany
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38
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Dettmann R, Ziegler T. Synthesis of octyl S-glycosides of tri- to pentasaccharide fragments related to the GPI anchor of Trypanosoma brucei. Carbohydr Res 2011; 346:2348-61. [PMID: 21920515 DOI: 10.1016/j.carres.2011.08.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2011] [Revised: 06/21/2011] [Accepted: 08/02/2011] [Indexed: 10/17/2022]
Abstract
The three oligosaccharide octyl-S-glycosides Man-α1,6-Man-α1,4-GlcNH(2)-α1,S-Octyl (19), Man-α1,6-(Gal-α1,3)Man-α1,4-GlcNH(2)-α1,S-Octyl (27) and Man-α1,2-Man-α1,6-(Gal-α1,3)Man-α1,4-GlcNH(2)-α1,S-Octyl (37), related to the GPI anchor of Trypanosoma brucei were prepared by a stepwise and block-wise approach from octyl 2-azido-2-deoxy-3,6-di-O-benzyl-1-thio-α-D-glucopyranoside (8) and octyl 2-O-benzoyl-4,6-O-(1,1,3,3-tetraisopropyl-1,3-disiloxane-1,3-diyl)-1-thio-α-D-mannopyransoside (9). Glucosamine derivative 8 was obtained from 1,3,4,6-tetra-O-acetyl-2-azido-2-desoxy-β-D-glucopyranose (1) in five steps. Mannoside 9 was converted into the corresponding imidate 12 and coupled with 8 to give disaccharide octyl-S-glycoside 13 which was further mannosylated to afford trisaccharide 19 upon deprotection. Likewise, mannoside 9 was galactosylated, converted into the corresponding imidate and coupled with 8 to give trisaccharide 25. Mannosylation of the latter afforded tetrasaccharide 27 upon deprotection. Condensation of 25 with disaccharide imidate 35 gave, upon deprotection of the intermediates, the corresponding pentasaccharide octyl-S-glycoside 37. Saccharides 19, 27 and 37 are suitable substrates for studying the enzymatic glycosylation pattern of the GPI anchor of T. brucei.
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Affiliation(s)
- Ralf Dettmann
- Institute of Organic Chemistry, University of Tuebingen, Auf der Morgenstelle 18, 72076 Tuebingen, Germany
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39
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Maldonado OS, Lucas R, Comelles F, Jesús González M, Parra JL, Medina I, Morales JC. Synthesis and characterization of phenolic antioxidants with surfactant properties: glucosyl- and glucuronosyl alkyl gallates. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.07.046] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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40
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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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41
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Goto K, Nuermaimaiti N, Mizuno M. Effective Application of Heavy Fluorous Thioglycoside for Oligosaccharide Synthesis. CHEM LETT 2011. [DOI: 10.1246/cl.2011.756] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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42
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Nagel L, Plattner C, Budke C, Majer Z, DeVries AL, Berkemeier T, Koop T, Sewald N. Synthesis and characterization of natural and modified antifreeze glycopeptides: glycosylated foldamers. Amino Acids 2011; 41:719-32. [DOI: 10.1007/s00726-011-0937-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Accepted: 04/18/2011] [Indexed: 11/29/2022]
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43
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Brand C, Granitzka M, Stalke D, Werz DB. Reducing the conformational flexibility of carbohydrates: locking the 6-hydroxyl group by cyclopropanes. Chem Commun (Camb) 2011; 47:10782-4. [DOI: 10.1039/c1cc14025f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Wiebe C, Schlemmer C, Weck S, Opatz T. Sweet (hetero)aromatics: glycosylated templates for the construction of saccharide mimetics. Chem Commun (Camb) 2011; 47:9212-4. [DOI: 10.1039/c1cc13078a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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45
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Fujita M, Tsuchida A, Hirata A, Kobayashi N, Goto K, Osumi K, Hirose Y, Nakayama J, Yamanoi T, Ashida H, Mizuno M. Glycoside hydrolase family 89 alpha-N-acetylglucosaminidase from Clostridium perfringens specifically acts on GlcNAc alpha1,4Gal beta1R at the non-reducing terminus of O-glycans in gastric mucin. J Biol Chem 2010; 286:6479-89. [PMID: 21177247 DOI: 10.1074/jbc.m110.206722] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
In mammals, α-linked GlcNAc is primarily found in heparan sulfate/heparin and gastric gland mucous cell type mucin. α-N-acetylglucosaminidases (αGNases) belonging to glycoside hydrolase family 89 are widely distributed from bacteria to higher eukaryotes. Human lysosomal αGNase is well known to degrade heparin and heparan sulfate. Here, we reveal the substrate specificity of αGNase (AgnC) from Clostridium perfringens strain 13, a bacterial homolog of human αGNase, by chemically synthesizing a series of disaccharide substrates containing α-linked GlcNAc. AgnC was found to release GlcNAc from GlcNAcα1,4Galβ1pMP and GlcNAcα1pNP substrates (where pMP and pNP represent p-methoxyphenyl and p-nitrophenyl, respectively). AgnC also released GlcNAc from porcine gastric mucin and cell surface mucin. Because AgnC showed no activity against any of the GlcNAcα1,2Galβ1pMP, GlcNAcα1,3Galβ1pMP, GlcNAcα1,6Galβ1pMP, and GlcNAcα1,4GlcAβ1pMP substrates, this enzyme may represent a specific glycosidase required for degrading α-GlcNAc-capped O-glycans of the class III mucin secreted from the stomach and duodenum. Deletion of the C-terminal region containing several carbohydrate-binding module 32 (CBM32) domains significantly reduced the activity for porcine gastric mucin; however, activity against GlcNAcα1,4Galβ1pMP was markedly enhanced. Dot blot and ELISA analyses revealed that the deletion construct containing the C-terminal CBM-C2 to CBM-C6 domains binds strongly to porcine gastric mucin. Consequently, tandem CBM32 domains located near the C terminus of AgnC should function by increasing the affinity for branched or clustered α-GlcNAc-containing glycans. The agnC gene-disrupted strain showed significantly reduced growth on the class III mucin-containing medium compared with the wild type strain, suggesting that AgnC might have an important role in dominant growth in intestines.
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Affiliation(s)
- Masaya Fujita
- Noguchi Institute, 1-8-1 Kaga, Itabashi, Tokyo 173-0003, Japan.
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Goto K, Mizuno M. Practical heavy fluorous tag for carbohydrate synthesis with minimal chromatographic purification. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.10.016] [Citation(s) in RCA: 11] [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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Zhu Z, Li S, Liu R, Yuan J, Wang H, Zhang Y, Liu Y. Regio- and Stereo-selective Synthesis of Peracetylated Carbohydrate Esters of Aromatic Fatty Acid Using p-Toluenesulfonic Acid as Catalyst. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.201090371] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Larrosa M, Tomé-Carneiro J, Yáñez-Gascón MJ, Alcántara D, Selma MV, Beltrán D, García-Conesa MT, Urbán C, Lucas R, Tomás-Barberán F, Morales JC, Espín JC. Preventive oral treatment with resveratrol pro-prodrugs drastically reduce colon inflammation in rodents. J Med Chem 2010; 53:7365-76. [PMID: 20866032 DOI: 10.1021/jm1007006] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
There is no pharmaceutical or definitive surgical cure for inflammatory bowel diseases (IBDs). The naturally occurring polyphenol resveratrol exerts anti-inflammatory properties. However, its rapid metabolism diminishes its effectiveness in the colon. The design of prodrugs to targeting active molecules to the colon provides an opportunity for therapy of IBDs. Herein we explore the efficacy of different resveratrol prodrugs and pro-prodrugs to ameliorate colon inflammation in the murine dextran sulfate sodium (DSS) model. Mice fed with a very low dose (equivalent to 10 mg for a 70 kg-person) of either resveratrol-3-O-(6'-O-butanoyl)-β-D-glucopyranoside (6) or resveratrol-3-O-(6'-O-octanoyl)-β-D-glucopyranoside (7) did not develop colitis symptoms and improved 6-fold the disease activity index (DAI) compared to resveratrol. Our results indicate that these pro-prodrugs exerted a dual effect: (1) they prevented the rapid metabolism of resveratrol and delivered higher quantities of resveratrol to the colon and (2) they reduced mucosal barrier imbalance and prevented diarrhea, which consequently facilitated the action of the delivered resveratrol in the colon mucosa.
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Affiliation(s)
- Mar Larrosa
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, CEBAS-CSIC, 30100 Campus de Espinardo, Murcia, Spain
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Verduyn R, Elie CJJ, Dreef CE, van der Marel GA, van Boom JH. Stereospecific synthesis of partially protected 2-azido-2-deoxy-D-glucosyl D-myo
-inositol: Precursor of a potential insulin mimetic and membrane protein anchoring site. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19901091205] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Ludek OR, Gu W, Gildersleeve JC. Activation of glycosyl trichloroacetimidates with perchloric acid on silica (HClO(4)-SiO(2)) provides enhanced alpha-selectivity. Carbohydr Res 2010; 345:2074-8. [PMID: 20692651 DOI: 10.1016/j.carres.2010.07.030] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2010] [Revised: 07/15/2010] [Accepted: 07/16/2010] [Indexed: 11/16/2022]
Abstract
Obtaining high stereoselectivity in glycosylation reactions is often challenging in the absence of neighboring group participation. In this study, we demonstrate that activation of glycosyl trichloroacetimidate donors with immobilized perchloric acid on silica (HClO(4)-SiO(2)) provides higher alpha-selectivity than trimethylsilyl triflate (TMSOTf) for reactions that do not involve neighboring group participation.
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Affiliation(s)
- Olaf R Ludek
- Chemical Biology Laboratory, National Cancer Institute at Frederick, National Institutes of Health, 376 Boyles St., Frederick, MD 21702, USA
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