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Hettikankanamalage AA, Lassfolk R, Ekholm FS, Leino R, Crich D. Mechanisms of Stereodirecting Participation and Ester Migration from Near and Far in Glycosylation and Related Reactions. Chem Rev 2020; 120:7104-7151. [PMID: 32627532 PMCID: PMC7429366 DOI: 10.1021/acs.chemrev.0c00243] [Citation(s) in RCA: 105] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review is the counterpart of a 2018 Chemical Reviews article (Adero, P. O.; Amarasekara, H.; Wen, P.; Bohé, L.; Crich, D. Chem. Rev. 2018, 118, 8242-8284) that examined the mechanisms of chemical glycosylation in the absence of stereodirecting participation. Attention is now turned to a critical review of the evidence in support of stereodirecting participation in glycosylation reactions by esters from either the vicinal or more remote positions. As participation by esters is often accompanied by ester migration, the mechanism(s) of migration are also reviewed. Esters are central to the entire review, which accordingly opens with an overview of their structure and their influence on the conformations of six-membered rings. Next the structure and relative energetics of dioxacarbeniun ions are covered with emphasis on the influence of ring size. The existing kinetic evidence for participation is then presented followed by an overview of the various intermediates either isolated or characterized spectroscopically. The evidence supporting participation from remote or distal positions is critically examined, and alternative hypotheses for the stereodirecting effect of such esters are presented. The mechanisms of ester migration are first examined from the perspective of glycosylation reactions and then more broadly in the context of partially acylated polyols.
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Affiliation(s)
- Asiri A. Hettikankanamalage
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, GA 30602, USA
- Department of Chemistry, University of Georgia, 140 Cedar Street, Athens, GA 30602, USA
| | - Robert Lassfolk
- Johan Gadolin Process Chemistry Centre, Laboratory of Molecular Science and Technology, Åbo Akademi University, 20500 Åbo, Finland
| | - Filip S. Ekholm
- Department of Chemistry, University of Helsinki, A. I. Virtasen aukio 1, 00014 Helsinki, Finland
| | - Reko Leino
- Johan Gadolin Process Chemistry Centre, Laboratory of Molecular Science and Technology, Åbo Akademi University, 20500 Åbo, Finland
| | - David Crich
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, 250 West Green Street, Athens, GA 30602, USA
- Department of Chemistry, University of Georgia, 140 Cedar Street, Athens, GA 30602, USA
- Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Road, Athens, GA 30602, USA
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Adero PO, Amarasekara H, Wen P, Bohé L, Crich D. The Experimental Evidence in Support of Glycosylation Mechanisms at the S N1-S N2 Interface. Chem Rev 2018; 118:8242-8284. [PMID: 29846062 PMCID: PMC6135681 DOI: 10.1021/acs.chemrev.8b00083] [Citation(s) in RCA: 213] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A critical review of the state-of-the-art evidence in support of the mechanisms of glycosylation reactions is provided. Factors affecting the stability of putative oxocarbenium ions as intermediates at the SN1 end of the mechanistic continuum are first surveyed before the evidence, spectroscopic and indirect, for the existence of such species on the time scale of glycosylation reactions is presented. Current models for diastereoselectivity in nucleophilic attack on oxocarbenium ions are then described. Evidence in support of the intermediacy of activated covalent glycosyl donors is reviewed, before the influences of the structure of the nucleophile, of the solvent, of temperature, and of donor-acceptor hydrogen bonding on the mechanism of glycosylation reactions are surveyed. Studies on the kinetics of glycosylation reactions and the use of kinetic isotope effects for the determination of transition-state structure are presented, before computational models are finally surveyed. The review concludes with a critical appraisal of the state of the art.
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Affiliation(s)
- Philip Ouma Adero
- Department of Chemistry , Wayne State University , 5101 Cass Avenue , Detroit , Michigan 48202 , United States
| | - Harsha Amarasekara
- Department of Chemistry , Wayne State University , 5101 Cass Avenue , Detroit , Michigan 48202 , United States
| | - Peng Wen
- Department of Chemistry , Wayne State University , 5101 Cass Avenue , Detroit , Michigan 48202 , United States
| | - Luis Bohé
- Institut de Chimie des Substances Naturelles, CNRS UPR 2301 , Université Paris-Sud Université Paris-Saclay , 1 avenue de la Terrasse , 91198 Gif-sur-Yvette , France
| | - David Crich
- Department of Chemistry , Wayne State University , 5101 Cass Avenue , Detroit , Michigan 48202 , United States
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Hu Y, Yu K, Shi LL, Liu L, Sui JJ, Liu DY, Xiong B, Sun JS. o-(p-Methoxyphenylethynyl)phenyl Glycosides: Versatile New Glycosylation Donors for the Highly Efficient Construction of Glycosidic Linkages. J Am Chem Soc 2017; 139:12736-12744. [DOI: 10.1021/jacs.7b07020] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yang Hu
- The National Research Centre
for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang
Avenue, Nanchang 330022, China
| | - Ke Yu
- The National Research Centre
for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang
Avenue, Nanchang 330022, China
| | - Li-Li Shi
- The National Research Centre
for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang
Avenue, Nanchang 330022, China
| | - Lei Liu
- The National Research Centre
for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang
Avenue, Nanchang 330022, China
| | - Jing-Jing Sui
- The National Research Centre
for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang
Avenue, Nanchang 330022, China
| | - De-Yong Liu
- The National Research Centre
for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang
Avenue, Nanchang 330022, China
| | - Bin Xiong
- The National Research Centre
for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang
Avenue, Nanchang 330022, China
| | - Jian-Song Sun
- The National Research Centre
for Carbohydrate Synthesis, Jiangxi Normal University, 99 Ziyang
Avenue, Nanchang 330022, China
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Synthesis of mono- and di-α-l-fucosylated 2-acetamido-2-deoxy-N-glycyl-β-d-glucopyranosylamines, spacered fragments of glycans of N-glycoproteins. Russ Chem Bull 2016. [DOI: 10.1007/s11172-015-0990-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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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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Lian G, Zhang X, Yu B. Thioglycosides in Carbohydrate Research. Carbohydr Res 2015; 403:13-22. [DOI: 10.1016/j.carres.2014.06.009] [Citation(s) in RCA: 143] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Revised: 05/29/2014] [Accepted: 06/10/2014] [Indexed: 11/30/2022]
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Huang M, Garrett GE, Birlirakis N, Bohé L, Pratt DA, Crich D. Dissecting the mechanisms of a class of chemical glycosylation using primary ¹³C kinetic isotope effects. Nat Chem 2012; 4:663-7. [PMID: 22824899 PMCID: PMC3404748 DOI: 10.1038/nchem.1404] [Citation(s) in RCA: 153] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 06/07/2012] [Indexed: 01/13/2023]
Abstract
Although arguably the most important reaction in glycoscience, chemical glycosylations are among the least well understood of organic chemical reactions, resulting in an unnecessarily high degree of empiricism and a brake on rational development in this critical area. To address this problem, primary (13)C kinetic isotope effects have now been determined for the formation of β- and α-manno- and glucopyranosides using a natural abundance NMR method. In contrast to the common current assumption, for three of the four cases studied the experimental and computed values are indicative of associative displacement of the intermediate covalent glycosyl trifluoromethanesulfonates. For the formation of the α-mannopyranosides, the experimentally determined KIE differs significantly from that computed for an associative displacement, which is strongly suggestive of a dissociative mechanism that approaches the intermediacy of a glycosyl oxocarbenium ion. The application of analogous experiments to other glycosylation systems should shed further light on their mechanisms and thus assist in the design of better reactions conditions with improved stereoselectivity.
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Affiliation(s)
- Min Huang
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, CNRS, Avenue de Terrasse, 91198 Gif-sur-Yvette, France
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Cumpstey I. On a so-called “kinetic anomeric effect” in chemical glycosylation. Org Biomol Chem 2012; 10:2503-8. [DOI: 10.1039/c2ob06696c] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Crich D. Methodology development and physical organic chemistry: a powerful combination for the advancement of glycochemistry. J Org Chem 2011; 76:9193-209. [PMID: 21919522 PMCID: PMC3215858 DOI: 10.1021/jo2017026] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
This Perspective outlines work in the Crich group on the diastereoselective synthesis of the so-called difficult classes of glycosidic bond: the 2-deoxy-β-glycopyranosides, the β-mannopyranosides, the α-sialosides, the α-glucopyranosides, and the β-arabinofuranosides with an emphasis on the critical interplay between mechanism and methodology development.
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Affiliation(s)
- David Crich
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
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12
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Li YX, Li YW, Zhaivg W, Guan HS. An Alternative Method for Anomeric Deacetylation of Per-acetylated Carbohydrates. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20040220125] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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13
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Panchadhayee R, Misra AK. N-Bromosuccinimide-Mediated Conversion of Allyl Glycosides to Glycosyl Hemiacetals. J Carbohydr Chem 2010. [DOI: 10.1080/07328301003664887] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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14
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McKay MJ, Naab BD, Mercer GJ, Nguyen HM. Selective formation of beta-O-aryl glycosides in the absence of the C(2)-ester neighboring group. J Org Chem 2009; 74:4705-11. [PMID: 19485363 DOI: 10.1021/jo9002807] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The development of a general and practical method for the stereoselective synthesis of beta-O-aryl glycosides that exploits the nature of a cationic palladium(II) catalyst, instead of a C(2)-ester directing group, to control the beta-selectivity is described. This beta-glycosylation reaction is highly diastereoselective and requires 2-3 mol % of Pd(CH(3)CN)(4)(BF(4))(2) to activate glycosyl trichloroacetimidate donors at room temperature. The current method has been applied to d-glucose, d-galactose, and d-xylose donors with a nondirecting group incorporated at the C(2)-position to provide the O-aryl glycosides with good to excellent beta-selectivity. In addition, its application is widespread to electron-donating, electron-withdrawing, and hindered phenols. The reaction is likely to proceed through a seven-membered ring intermediate, wherein the palladium catalyst coordinates to both C(1)-trichloroacetimidate nitrogen and C(2)-oxygen of the donor, blocking the alpha-face. As a result, the phenol nucleophile preferentially approaches to the top face of the activated donor, leading to formation of the beta-O-aryl glycoside.
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Affiliation(s)
- Matthew J McKay
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, USA
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15
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Mensah EA, Azzarelli JM, Nguyen HM. Palladium-controlled beta-selective glycosylation in the absence of the C(2)-ester participatory group. J Org Chem 2009; 74:1650-7. [PMID: 19161277 DOI: 10.1021/jo802468p] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The development of a new glycosylation method for the stereoselective synthesis of beta-glycosides in the absence of the traditional C(2)-ester neighboring group effect is described. This process relies on the ability of the cationic palladium catalyst, Pd(PhCN)(2)(OTf)(2) generated in situ from Pd(PhCN)(2)Cl(2) and AgOTf, to direct beta-selectivity. The new glycosylation reaction is highly beta-selective and proceeds under mild conditions with 1-2 mol % of catalyst loading. This beta-glycosylation method has been applied to a number of glucose donors with benzyl, allyl, and p-methoxybenzyl groups incorporated at the C(2)-position as well as tribenzylated xylose and quinovose donors to prepare various disaccharides and trisaccharides with good to excellent beta-selectivity. Mechanistic studies suggest that the major operative pathway is likely to proceed via a seven-membered ring intermediate, wherein the cationic palladium complex coordinates to both the C(1)-imidate nitrogen and C(2)-oxygen of the trichloroacetimidate donor. Formation of this seven-membered ring intermediate directs the selectivity, leading to the formation of beta-glycosides.
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Affiliation(s)
- Enoch A Mensah
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, USA
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16
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Chang SS, Lin CC, Li YK, Mong KKT. A straightforward α-selective aromatic glycosylation and its application for stereospecific synthesis of 4-methylumbelliferyl α-T-antigen. Carbohydr Res 2009; 344:432-8. [DOI: 10.1016/j.carres.2008.12.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2008] [Revised: 12/07/2008] [Accepted: 12/11/2008] [Indexed: 11/24/2022]
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17
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Hatch DM, Weiss AA, Kale RR, Iyer SS. Biotinylated Bi- and Tetra-antennary Glycoconjugates forEscherichia coliDetection. Chembiochem 2008; 9:2433-42. [DOI: 10.1002/cbic.200800188] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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18
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Sun B, Pukin AV, Visser GM, Zuilhof H. An efficient glycosylation reaction for the synthesis of asialo GM2 analogues. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.08.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Eklind K, Gustafsson1 R, Tidén AK, Norberg T, Åberg2 PM. Large-Scale Synthesis of a Lewis b Tetrasaccharide Derivative, its Acrylamide Copolymer, and Related DI- and Trisaccharides for Use in Adhesion Inhibition Studies with Helicobacter Pylori. J Carbohydr Chem 2006. [DOI: 10.1080/07328309608006504] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- K. Eklind
- a Astra Arcus AB , S-151 85, Södertälje, Sweden
| | | | - A. K. Tidén
- a Astra Arcus AB , S-151 85, Södertälje, Sweden
| | - T. Norberg
- b Department of Chemistry , Swedish University of Agricultural Sciences , P.O. Box 7015, S-750 07, Uppsala, Sweden
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Affiliation(s)
- Xianglan Ding
- a Research Center for Eco-Environmental Sciences , Academia Sinica , P.O.Box 2871 , Beijing , 100085 , P. R. China
| | - Fanzuo Kong
- a Research Center for Eco-Environmental Sciences , Academia Sinica , P.O.Box 2871 , Beijing , 100085 , P. R. China
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21
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Ning J, Kong F. A Facile Synthesis of 1,2-Anhydro-6-O-acetyl-3,4-di-O-benzyl-d-glycopyranoses and 1,2-Anhydro-5-O-acetyl-3-O-benzyl-D-glycofuranoses. J Carbohydr Chem 2006. [DOI: 10.1080/07328309808007470] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Jun Ning
- a Research Center for Eco-Environmental Sciences , Academia Sinica , P.O.Box 2871 , Beijing , 100085 , P. R. China
| | - Fanzuo Kong
- a Research Center for Eco-Environmental Sciences , Academia Sinica , P.O.Box 2871 , Beijing , 100085 , P. R. China
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22
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Lazarević D, Thiem J. Artificial N-functionalized UDP-glucosamine analogues as modified substrates for N-acetylglucosaminyl transferases. Carbohydr Res 2006; 341:569-76. [PMID: 16445891 DOI: 10.1016/j.carres.2006.01.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2005] [Revised: 12/06/2005] [Accepted: 01/15/2006] [Indexed: 11/26/2022]
Abstract
Analogues of UDP-GlcNAc modified at the 2-acetamido group of the GlcNAc moiety were prepared in order to study their role in the mechanism of N-acetylglucosaminyl transferase mediated glycosylation reactions. The structural analogues with N-formyl-, N-propionyl-, N-butyryl- and N-isobutyryl-groups were synthesized, utilizing the morpholidate coupling method starting from d-glucosaminyl-1-phosphate after selective N-acylation of its amino group with the appropriate N-acyloxysuccinimide esters as well as a chlorinated formylformiate.
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Affiliation(s)
- Daniel Lazarević
- Institut für Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany
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23
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Crich D, Li W. Efficient glycosidation of a phenyl thiosialoside donor with diphenyl sulfoxide and triflic anhydride in dichloromethane. Org Lett 2006; 8:959-62. [PMID: 16494484 PMCID: PMC2615465 DOI: 10.1021/ol060030s] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The formation of sialic acid glycosides with a thiosialic acid derivative, diphenyl sulfoxide, and trifluoromethanesulfonic anhydride is reported. With an excess of diphenyl sulfoxide, glycal formation can be completely suppressed and excellent yields are obtained for coupling to a wide range of primary, secondary, and tertiary acceptors.
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Affiliation(s)
- David Crich
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061,
| | - Wenju Li
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061,
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Crich D, Jayalath P. Stereocontrolled Formation of β-Glucosides and Related Linkages in the Absence of Neighboring Group Participation: Influence of a trans-Fused 2,3-O-Carbonate Group. J Org Chem 2005; 70:7252-9. [PMID: 16122245 DOI: 10.1021/jo0508999] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] Phenyl 4,6-di-O-benzyl-2,3-O-carbonyl-beta-D-glucothiopyranoside and the regiosiomeric phenyl 2,6-di-O-benzyl-3,4-O-carbonyl-beta-D-glucothiopyranoside were prepared and studied as glucosyl donors at -60 degrees C in dichloromethane with preactivation by 1-benzenesulfinyl piperidine before addition of the acceptor alcohol. The 2,3-O-carbonate protected donor showed moderate to excellent beta-selectivity under these conditions depending on the acceptor employed, thereby providing a means for 1,2-trans-equatorial glycosidic bonds without recourse to neighboring group participation and its associated problem of ortho ester formation. In contrast, the 3,4-O-carbonate protected donor showed moderate to no beta-selectivity under the conditions employed. The results obtained in this study with carbonate protected glucopyranosyl donors are contrasted with those obtained previously in the manno- and rhamnopyranosyl series when the 2,3-O-carbonate protected is alpha-selective and the 3,4-O-carbonate is beta-selective.
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Affiliation(s)
- David Crich
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, USA.
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Crich D, Vinod AU. 6-O-Benzyl- and 6-O-silyl-N-acetyl-2-amino-2-N,3-O-carbonyl-2-deoxyglucosides: effective glycosyl acceptors in the glucosamine 4-OH Series. effect of anomeric stereochemistry on the removal of the oxazolidinone group. J Org Chem 2005; 70:1291-6. [PMID: 15704963 DOI: 10.1021/jo0482559] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] The 4-OH groups of both alpha- and beta-methyl glycosides of N-acetylglucosamine, protected with an oxazolidinone spanning the nitrogen and O-3, and bearing benzyl or silyl protection on O-6, show excellent reactivity as acceptors in couplings to a range of glycosyl donors. The enhanced reactivity of these acceptors is attributed in part to the tied back nature of the oxazolidinone, which reduces hindrance around the nucleophilic oxygen. The N-acetyloxazolidinone function also reduces the tendency seen in simple N-acetylglucosamines toward amide glycosylation, and removes the possibility of problematic hydrogen bonding networks. In the beta-, but not the alpha-, series selective hydrolysis of the N-acetyloxazolidinone directly to the N-acetylglucosamine was possible with barium hydroxide, a feature attributed to chelate formation between the acetamide carbonyl group and the glycosidic oxygen in the beta-series.
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Affiliation(s)
- David Crich
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, USA.
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Fu M, Zhang G, Ning J. First synthesis of the immunodominant β-galactofuranose-containing tetrasaccharide present in the cell wall of Aspergillus fumigatus. Carbohydr Res 2005; 340:25-30. [PMID: 15620663 DOI: 10.1016/j.carres.2004.10.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2004] [Accepted: 10/20/2004] [Indexed: 11/30/2022]
Abstract
beta-Galf-(1-->5)-beta-Galf-(1-->6)-alpha-Manp-(1-->6)-alpha-Manp, the immunodominant epitope in the cell-wall galactomannan of Aspergillus fumigatus, was synthesized for the first time as its allyl glycoside. The key disaccharide glycosyl donor, 2,3,5,6-tetra-O-benzoyl-beta-D-galactofuranosyl-(1-->5)-2-O-acetyl-3,6-di-O-benzoyl-beta-D-galactofuranosyl trichloroacetimidate (10), was constructed by 5-O-glycosylation of 1,2-O-isopropylidene-3,6-di-O-benzoyl-alpha-D-galactofuranose (4) with 2,3,5,6-tetra-O-benzoyl-beta-D-galactofuranosyl trichloroacetimidate (5), followed by 1,2-O-deacetonation, acetylation, selective 1-O-deacetylation, and trichloroacetimidation. The target tetrasaccharide 16 was obtained by the condensation of allyl 2,3,4-tri-O-benzoyl-alpha-D-mannopyranosyl-(1-->6)-2,3,4-tri-O-benzoyl-alpha-D-mannopyranoside (14) as glycosyl acceptor with the disaccharide glycosyl donor 10, followed by deprotection.
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Affiliation(s)
- Mingkun Fu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, PO Box 2871, Beijing 100085, China
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27
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28
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Crich D, Vinod AU. Oxazolidinone protection of N-acetylglucosamine confers high reactivity on the 4-hydroxy group in glycosylation. Org Lett 2003; 5:1297-300. [PMID: 12688743 DOI: 10.1021/ol0342305] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] The preparation of a convenient oxazolidinone protected N-acetyl glucosamine 4-OH derivative is reported. This substance exhibits enhanced reactivity as a glycosyl acceptor in a variety of coupling methods, the products of which are converted to the target N-acetylglucosaminyl saccharides under very mild conditions.
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Affiliation(s)
- David Crich
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, USA.
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29
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Wang H, Ning J. A one-pot strategy for synthesis of 5-O-(alpha-D-arabinofuranosyl)-6-O-(beta-D-galactofuranosyl)-D-galactofuranose present in motif E of the Mycobacterium tuberculosis cell wall. J Org Chem 2003; 68:2521-4. [PMID: 12636432 DOI: 10.1021/jo026325a] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
5-O-(Alpha-D-arabinofuranosyl)-6-O-(beta-D-galactofuranosyl)-D-galactofuranose 6 present in motif E of the Macobacterium tuberculosis cell wall has been regio- and stereospecifically synthesized using 3-O-benzoyl-1,2-O-isopropylidine-alpha-D-galactofuranose (10) as the glycosyl acceptor by the trichloroacetamidate method in a one-pot manner. The diol glycosyl acceptor 10 was smoothly derived from 1,2:5,6-di-O-isopropylidene-alpha-D-galactofuranose (8) by 3-O-benzoylation and then selective 5,6-O-deacetonation. The preparation of 8 was greatly improved by increasing the ratio of DMF to acetone and using a solid-supported catalyst.
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Affiliation(s)
- Hairong Wang
- Department of Chemistry, Tsinghua University, Beijing 100084, China
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30
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Lazarevic D, Thiem J. Syntheses of unnatural N-substituted UDP-galactosamines as alternative substrates for N-acetylgalactosaminyl transferases. Carbohydr Res 2002; 337:2187-94. [PMID: 12433482 DOI: 10.1016/s0008-6215(02)00183-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
UDP-GalNAc analogues with slight modifications in the 2-acetamido group of the GalNAc moiety are prepared in order to study their role in the mechanism of the N-acetylgalactosaminyl transferase mediated glycosylation step. The analogues with N-propionyl-, N-butyryl- and N-bromoacetyl-groups were synthesized, utilizing Khorana's morpholidate coupling method starting from D-galactosaminyl-1-phosphate after selective N-acylation of its amino group with the appropriate N-acyloxysuccinimides. Furthermore, in addition to UDP-galactosamine its 2-azido analogue has been efficiently prepared involving a metal catalyzed diazo transfer reaction.
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Affiliation(s)
- Daniel Lazarevic
- Institut für Organische Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, D-20146 Hamburg, Germany
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31
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Mondal E, Barua PMB, Bose G, Khan AT. A Useful and Convenient Synthetic Procedure for Hydrolysis of Thioglycosides. CHEM LETT 2002. [DOI: 10.1246/cl.2002.210] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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32
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Ando H, Manabe S, Nakahara Y, Ito Y. Solid-Phase Capture-Release Strategy Applied to Oligosaccharide Synthesis on a Soluble Polymer Support. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20011217)113:24<4861::aid-ange4861>3.0.co;2-v] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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33
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Ando H, Manabe S, Nakahara Y, Ito Y. Solid-Phase Capture-Release Strategy Applied to Oligosaccharide Synthesis on a Soluble Polymer Support This work was supported in part by the Mizutani Foundation for Glycoscience (grant to Y.I.), the RIKEN Presidential Fund (grant to S.M.), and the Ministry of Education, Culture, Sports, Science and Technology (Grant-in-Aid for Scientific Research to S.M.). We thank Dr. Teiji Chihara and his staff for the elemental analyses, Ms. Yasuko Tanaka for her contribution at the exploratory stage of this work, and Ms. Akemi Takahashi for her technical assistance. Angew Chem Int Ed Engl 2001; 40:4725-4728. [PMID: 12404396 DOI: 10.1002/1521-3773(20011217)40:24<4725::aid-anie4725>3.0.co;2-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Hiromune Ando
- RIKEN (The Institute of Physical and Chemical Research) and CREST, Japan Science and Technology Corporation (JST) 2-1 Hirosawa, Wako-shi, Saitama 351-0198 (Japan)
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34
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Osborn HM, Brome VA, Harwood LM, Suthers WG. Regioselective C-3-O-acylation and O-methylation of 4,6-O-benzylidene-beta-D-gluco- and galactopyranosides displaying a range of anomeric substituents. Carbohydr Res 2001; 332:157-66. [PMID: 11434373 DOI: 10.1016/s0008-6215(01)00063-5] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The regioselective C-3-O-acylation and O-methylation of a range of 4,6-O-benzylidene-beta-D-gluco- and galactopyranosides has been studied. Regioselectivity is achieved by forming the copper chelate of the 2,3-diol using either sodium hydride and copper(II) chloride, or copper(II) acetylacetanoate, or copper(II) acetate, prior to introduction of the acylating or methylating agent.
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Affiliation(s)
- H M Osborn
- Department of Chemistry, University of Reading, Whiteknights, UK.
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35
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Zhu Y, Kong F. A facile and effective synthesis of alpha-(1-->6)-linked mannose di-, tri-, tetra-, hexa-, octa-, and dodecasaccharides, and beta-(1-->6)-linked glucose di-, tri-, tetra-, hexa-, and octasaccharides using sugar trichloroacetimidates as the donors and unprotected or partially protected glycosides as the acceptors. Carbohydr Res 2001; 332:1-21. [PMID: 11403082 DOI: 10.1016/s0008-6215(01)00070-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Reaction of 2,3,4,6-tetra-O-acetyl-alpha-D-mannopyranosyl trichloroimidate with allyl alpha-D-mannopyranoside in the presence of TMSOTf selectively gave allyl 2,3,4,6-tetra-O-acetyl-alpha-D-mannopyranosyl-(1-->6)-alpha-D-mannopyranoside through an orthoester intermediate. Benzoylation of 3, followed by deallylation, and then trichloroimidation afforded the disaccharide donor 2,3,4,6-tetra-O-acetyl-alpha-D-mannopyranosyl-(1-->6)-2,3,4-tri-O-benzoyl-alpha-D-mannopyranosyl trichloroimidate, while benzoylation of 3 followed by selective removal of acetyl groups yielded the disaccharide acceptor allyl alpha-D-mannopyranosyl-(1-->6)-2,3,4-tri-O-benzoyl-alpha-D-mannopyranoside. Coupling of 5 with 6 gave the tetrasaccharide allyl 2,3,4,6-tetra-O-acetyl-alpha-D-mannopyranosyl-(1-->6)-2,3,4-tri-O-benzoyl-alpha-D-mannopyranosyl-(1-->6)-alpha-D-mannopyranosyl-(1-->6)-2,3,4-tri-O-benzoyl-alpha-D-mannopyranoside, which were converted into the tetrasaccharide donor 2,3,4,6-tetra-O-acetyl-alpha-D-mannopyranosyl-(1-->6)-2,3,4-tri-O-benzoyl-alpha-D-mannopyranosyl-(1-->6)-2,3,4-tri-O-benzoyl-alpha-D-mannopyranosyl-(1-->6)-2,3,4-tri-O-benzoyl-alpha-D-mannopyranosyl trichloroimdate and the tetrasaccharide acceptor allyl alpha-D-mannopyranosyl-(1-->6)-2,3,4-tri-O-benzoyl-alpha-D-mannopyranosyl-(1-->6)-2,3,4-tri-O-benzoyl-alpha-D-mannopyranosyl-(1-->6)-2,3,4-tri-O-benzoyl-alpha-D-mannopyranoside, respectively, by the same strategies as used for conversion of 3 into 5 and 6. Condensation of 5 with 13 gave the hexasaccharide 14, while condensation of 12 with 13 gave the octasaccharide 17. Dodecasaccharide 21 was obtained by the coupling of 12 with the octasaccharide acceptor 20. Similar strategies were used for the syntheses of beta-(1-->6)-linked glucose di-, tri-, tetra-, hexa-, and octamers. Deprotection of the oligosaccharides in ammonia-saturated methanol yielded the free alpha-(1-->6)-linked mannosyl and beta-(1-->6)-linked glucosyl oligomers.
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Affiliation(s)
- Y Zhu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Academia Sinica, Beijing, People's Republic of China
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36
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37
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Liao W, Piskorz CF, Locke RD, Matta KL. N-p-nitrobenzyloxycarbonyl galactosamine imidate as a glycosyl donor for the efficient synthesis of mucin core-2 analogue. Bioorg Med Chem Lett 2000; 10:793-5. [PMID: 10782688 DOI: 10.1016/s0960-894x(00)00107-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
An efficient synthesis of the mucin core-2 analogue 1a was accomplished using N-p-nitrobenzyloxycarbonyl(PNZ)-protected trichloroacetimidate 4 as a novel glycosyl donor.
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Affiliation(s)
- W Liao
- Molecular & Cellular Biophysics, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
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38
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Sujino K, Uchiyama T, Hindsgaul O, Seto NOL, Wakarchuk WW, Palcic MM. Enzymatic Synthesis of Oligosaccharide Analogues: Evaluation of UDP-Gal Analogues as Donors for Three Retaining α-Galactosyltransferases. J Am Chem Soc 2000. [DOI: 10.1021/ja990964u] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Keiko Sujino
- Contribution from the Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2 Canada, The Noguchi Institute, 1-8-1, Kaga, Itabashi-ku, Tokyo 173-0003 Japan, and Institute for Biological Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada
| | - Taketo Uchiyama
- Contribution from the Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2 Canada, The Noguchi Institute, 1-8-1, Kaga, Itabashi-ku, Tokyo 173-0003 Japan, and Institute for Biological Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada
| | - Ole Hindsgaul
- Contribution from the Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2 Canada, The Noguchi Institute, 1-8-1, Kaga, Itabashi-ku, Tokyo 173-0003 Japan, and Institute for Biological Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada
| | - Nina O. L. Seto
- Contribution from the Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2 Canada, The Noguchi Institute, 1-8-1, Kaga, Itabashi-ku, Tokyo 173-0003 Japan, and Institute for Biological Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada
| | - Warren W. Wakarchuk
- Contribution from the Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2 Canada, The Noguchi Institute, 1-8-1, Kaga, Itabashi-ku, Tokyo 173-0003 Japan, and Institute for Biological Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada
| | - Monica M. Palcic
- Contribution from the Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2 Canada, The Noguchi Institute, 1-8-1, Kaga, Itabashi-ku, Tokyo 173-0003 Japan, and Institute for Biological Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario, K1A 0R6, Canada
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39
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Gridley JJ, Osborn HM, Suthers WG. Regioselective C-3-O-acylation and O-alkylation of 4,6-O-benzylidene-β-d-glucopyranoside, derivatives displaying a range of anomeric substituents. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)01420-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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40
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Wang W, Kong F. Highly Regio- and Stereoselective Synthesis of Bioactive Oligosaccharides Using 1,2-O-Ethylidene-α-d-gluco- and -β-d-Mannopyranose as the Acceptors and Acetobromosugars as the Donors via Ortho Ester Intermediates. J Org Chem 1999; 64:5091-5095. [DOI: 10.1021/jo982508e] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wei Wang
- Research Center for Eco-Environmental Sciences, Academia Sinica, P.O. Box 2871, Beijing 100085, China
| | - Fanzuo Kong
- Research Center for Eco-Environmental Sciences, Academia Sinica, P.O. Box 2871, Beijing 100085, China
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41
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Wang W, Kong F. Hochregio- und hochstereoselektive Synthese von mannosehaltigen Oligosacchariden mit Acetylbromzuckern als Donoren und teilweise geschützten Mannosederivaten als Acceptoren über Zuckerorthoester-Zwischenstufen. Angew Chem Int Ed Engl 1999. [DOI: 10.1002/(sici)1521-3757(19990503)111:9<1330::aid-ange1330>3.0.co;2-r] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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42
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Gridley JJ, Hacking AJ, Osborn HM, Spackman DG. Regioselective lipase-catalysed acylation of 4,6-O-benzylidene-α- and-β-d-pyranoside derivatives displaying a range of anomeric substituents. Tetrahedron 1998. [DOI: 10.1016/s0040-4020(98)00935-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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43
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Hirooka M, Koto S. Dehydrative Glycosylation by Diethylaminosulfur Trifluoride (DAST)–Tin(II) Trifluoromethanesulfonate–Tetrabutylammonium Perchlorate–Triethylamine System. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1998. [DOI: 10.1246/bcsj.71.2893] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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44
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45
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Dios A, Geer A, Marzabadi CH, Franck RW. Novel Heterocycloaddition Reaction of Glycals. J Org Chem 1998. [DOI: 10.1021/jo981047u] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Angeles Dios
- Department of Chemistry, Hunter College, 695 Park Avenue, New York, New York 10021
| | - Aloma Geer
- Department of Chemistry, Hunter College, 695 Park Avenue, New York, New York 10021
| | - Cecilia H. Marzabadi
- Department of Chemistry, Hunter College, 695 Park Avenue, New York, New York 10021
| | - Richard W. Franck
- Department of Chemistry, Hunter College, 695 Park Avenue, New York, New York 10021
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46
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Wang W, Kong F. New Synthetic Methodology for Regio- and Stereoselective Synthesis of Oligosaccharides via Sugar Ortho Ester Intermediates. J Org Chem 1998; 63:5744-5745. [PMID: 11672169 DOI: 10.1021/jo981135e] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wei Wang
- Research Center for Eco-Environmental Sciences, Academia Sinica, P.O. Box 2871, Beijing 100085, China
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47
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Liu D, Chen R, Hong L, Sofia MJ. Synthesis OF differentially protected phenyl d-thioglucopyranosides and 1-phenyl d-thioglucopyranosiduronic acids. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)00965-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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48
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Ajisaka K, Fujimoto H, Miyasato M. An alpha-L-fucosidase from Penicillium multicolor as a candidate enzyme for the synthesis of alpha (1-->3)-linked fucosyl oligosaccharides by transglycosylation. Carbohydr Res 1998; 309:125-9. [PMID: 9720243 DOI: 10.1016/s0008-6215(98)00112-8] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A new alpha-L-fucosidase was partially purified from the culture broth of Penicillium multicolor, which was available commercially as a freeze dried powder by the name of Lactase-P. This enzyme catalysed the transglycosylation of fucose residue of p-nitrophenyl-alpha-L-fucopyranoside to give alpha-L-Fuc-(1-->3)-D-Glc or alpha-L-Fuc-(1-->3)-D-GlcNAc regioselectively. This enzyme was more stable in the organic co-solvents than the alpha-fucosidase from Aspergillus niger, which was also proposed previously by us as an enzyme to produce fucosyl oligosaccharides.
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Affiliation(s)
- K Ajisaka
- Meiji Institute of Health Science, Meiji Milk Products, Co., Ltd., Odawara, Japan.
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49
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Kwon O, Danishefsky SJ. Synthesis of Asialo GM1. New Insights in the Application of Sulfonamidoglycosylation in Oligosaccharide Assembly: Subtle Proximity Effects in the Stereochemical Governance of Glycosidation. J Am Chem Soc 1998. [DOI: 10.1021/ja9724957] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ohyun Kwon
- Contribution from the Department of Chemistry, Havemeyer Hall, Columbia University, New York, New York 10027, and Laboratory for Bioorganic Chemistry, The Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, Box 106, New York, New York 10021
| | - Samuel J. Danishefsky
- Contribution from the Department of Chemistry, Havemeyer Hall, Columbia University, New York, New York 10027, and Laboratory for Bioorganic Chemistry, The Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, Box 106, New York, New York 10021
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50
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Baisch G, Ohrlein R, Streiff M. Enzymatic alpha(2-3)sialylation of non-natural type-I (Lewisc) disaccharides with recombinant sialyl-transferase. Bioorg Med Chem Lett 1998; 8:157-60. [PMID: 9871645 DOI: 10.1016/s0960-894x(97)10201-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Recombinant alpha(2-3)sialyl-transferase from rat liver is used to sialylate a series of type-I (Lewisc) disaccharides on a preparative scale. The enzyme tolerates a broad array of N-acetyl replacements of the N-glucosamine subunit ranging from small and large lipophilic groups to charged and heterocyclic amides.
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Affiliation(s)
- G Baisch
- Novartis Pharma AG, Basle, Switzerland
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