101
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Baek JY, Joo YJ, Kim KS. Stereoselective α-galactofuranosylation and synthesis of di- and tetrasaccharide subunits of cell wall polysaccharides of Talaromyces flavus. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.05.118] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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102
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Codée JDC, Kröck L, Castagner B, Seeberger PH. Automated solid-phase synthesis of protected oligosaccharides containing beta-mannosidic linkages. Chemistry 2008; 14:3987-94. [PMID: 18348157 DOI: 10.1002/chem.200701864] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
For automated oligosaccharide synthesis to impact glycobiology, synthetic access to most carbohydrates has to become efficient and routine. Methods to install "difficult" glycosidic linkages have to be established and incorporated into the overall synthetic concept. Described here is the first automated solid-phase synthesis of oligosaccharides containing the challenging beta-mannosidic linkage. Carboxybenzyl mannoside building blocks proved effective beta-mannosylation agents and resulted in excellent conversion and good to moderate selectivities. [(Triisopropylsilyl)oxy]-methyl ether (Tom), served as an orthogonal, minimally intrusive, and readily cleavable protecting group for the elongation of the C3 position of mannose. The desired oligosaccharide products were readily separated from by-products containing unwanted stereoisomers using reverse-phase HPLC. The methods described here expand the scope of carbohydrates currently accessible by automation as many oligosaccharides of biological interest contain beta-mannosidic linkages.
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Affiliation(s)
- Jeroen D C Codée
- Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2300 RA Leiden, The Netherlands
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103
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Lee YJ, Fulse DB, Kim KS. Synthesis of a tetrasaccharide phosphate from the linkage region of the arabinogalactan–peptidoglycan complex in the mycobacterial cell wall. Carbohydr Res 2008; 343:1574-84. [DOI: 10.1016/j.carres.2008.05.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2008] [Revised: 05/05/2008] [Accepted: 05/06/2008] [Indexed: 10/22/2022]
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104
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Kim KS, Fulse DB, Baek JY, Lee BY, Jeon HB. Stereoselective Direct Glycosylation with Anomeric Hydroxy Sugars by Activation with Phthalic Anhydride and Trifluoromethanesulfonic Anhydride Involving Glycosyl Phthalate Intermediates. J Am Chem Soc 2008; 130:8537-47. [DOI: 10.1021/ja710935z] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kwan Soo Kim
- Center for Bioactive Molecular Hybrids and the Department of Chemistry, Yonsei University, Seoul 120-749, Korea, and the Department of Chemistry, Kwangwoon University, Seoul 139-701, Korea
| | - Dinanath Baburao Fulse
- Center for Bioactive Molecular Hybrids and the Department of Chemistry, Yonsei University, Seoul 120-749, Korea, and the Department of Chemistry, Kwangwoon University, Seoul 139-701, Korea
| | - Ju Yuel Baek
- Center for Bioactive Molecular Hybrids and the Department of Chemistry, Yonsei University, Seoul 120-749, Korea, and the Department of Chemistry, Kwangwoon University, Seoul 139-701, Korea
| | - Bo-Young Lee
- Center for Bioactive Molecular Hybrids and the Department of Chemistry, Yonsei University, Seoul 120-749, Korea, and the Department of Chemistry, Kwangwoon University, Seoul 139-701, Korea
| | - Heung Bae Jeon
- Center for Bioactive Molecular Hybrids and the Department of Chemistry, Yonsei University, Seoul 120-749, Korea, and the Department of Chemistry, Kwangwoon University, Seoul 139-701, Korea
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105
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Kim KS, Lee BY, Yoon SH, Jeon HJ, Baek JY, Jeong KS. Chemical Synthesis of Cyclic Galactooligofuranosides Isolated from Enzymatic Degradation Products of Cell Wall Arabinogalactan of Mycobacterium tuberculosis. Org Lett 2008; 10:2373-6. [DOI: 10.1021/ol800530u] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kwan Soo Kim
- Center for Bioactive Molecular Hybrids and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Bo-Young Lee
- Center for Bioactive Molecular Hybrids and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Sung Ho Yoon
- Center for Bioactive Molecular Hybrids and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Hyo Jin Jeon
- Center for Bioactive Molecular Hybrids and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Ju Yuel Baek
- Center for Bioactive Molecular Hybrids and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
| | - Kyu-Sung Jeong
- Center for Bioactive Molecular Hybrids and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
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106
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Lee YJ, Ishiwata A, Ito Y. Stereoselective Synthesis of β-l-Rhamnopyranosides. J Am Chem Soc 2008; 130:6330-1. [DOI: 10.1021/ja801574q] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yong Joo Lee
- RIKEN (The Institute of Physical and Chemical Research), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Akihiro Ishiwata
- RIKEN (The Institute of Physical and Chemical Research), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Yukishige Ito
- RIKEN (The Institute of Physical and Chemical Research), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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107
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Kim KS, Jeon HB. Lactonization-mediated glycosylations and their application to oligosaccharide synthesis. CHEM REC 2008; 8:46-65. [DOI: 10.1002/tcr.20138] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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108
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Propargyl 1,2-orthoesters as glycosyl donors: stereoselective synthesis of 1,2-trans glycosides and disaccharides. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.07.015] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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109
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Baek JY, Choi TJ, Jeon HB, Kim KS. A highly reactive and stereoselective beta-mannopyranosylation system: mannosyl 4-pentenoate/PhSeOTf. Angew Chem Int Ed Engl 2007; 45:7436-40. [PMID: 17039555 DOI: 10.1002/anie.200602642] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ju Yuel Baek
- Center for Bioactive Molecular Hybrids and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
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110
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Morales-Serna JA, Boutureira O, Díaz Y, Matheu MI, Castillón S. Recent advances in the glycosylation of sphingosines and ceramides. Carbohydr Res 2007; 342:1595-612. [PMID: 17482586 DOI: 10.1016/j.carres.2007.03.028] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2007] [Revised: 03/27/2007] [Accepted: 03/31/2007] [Indexed: 12/31/2022]
Abstract
Glycosphingolipids (GSLs) are ubiquitous components of eukaryotic cell membranes. They are highly bioactive and are involved in many aspects of cell signalling like cell-cell interaction, cell-substratum interaction and cell-pathogen interaction. GSLs also are involved in the modulation of signal transduction, resulting in regulation of cell proliferation and differentiation. The biological importance and complexity of these compounds afford many opportunities to prepare synthetic analogues for studies of their metabolism in intra- and intercellular processes. This review focuses on recent contributions in the synthesis of GSLs, highlighting improvements in glycosylation reactions leading to alpha and beta glycosyl sphingosines and ceramides and related compounds. Literature from 2000 to the present is covered. The glycosylation reactions leading to the synthesis of GSLs are classified in function of the configuration of the created glycosidic bond (alpha or beta) and of the acceptor used, either azido-sphingosine or ceramide.
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Affiliation(s)
- José Antonio Morales-Serna
- Departament de Química Analítica i Química Orgànica, Facultat de Química, Universitat Rovira i Virgili, C/Marcelí Domingo s/n, 43005 Tarragona, Spain
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111
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Improved Synthesis of the Tetrasaccharide Repeat Unit of the O-Antigen Polysaccharide from Escherichia coli O77. B KOREAN CHEM SOC 2007. [DOI: 10.5012/bkcs.2007.28.2.257] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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112
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Litjens REJN, van den Bos LJ, Codée JDC, Overkleeft HS, van der Marel GA. The use of cyclic bifunctional protecting groups in oligosaccharide synthesis—an overview. Carbohydr Res 2007; 342:419-29. [PMID: 17007825 DOI: 10.1016/j.carres.2006.09.002] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2006] [Revised: 08/30/2006] [Accepted: 09/01/2006] [Indexed: 11/27/2022]
Abstract
A historical overview is presented on stereo-directing effects of cis- and trans-fused diol protective groups used on both donor and acceptor glycosides. Attention is focused on the use of cyclic carbonates and carbamates, diacetals and acetals and finally the special case of 1,2-O-orthoesters and 1,2-O-cyanoalkylidene functionalised residues.
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Affiliation(s)
- Remy E J N Litjens
- Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2333CC Leiden, The Netherlands
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113
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van den Bos LJ, Duivenvoorden BA, de Koning MC, Filippov DV, Overkleeft HS, van der Marel GA. Study of the Glycosidation Properties of 1-Thiomannosazidopyranosides and 1-Thiomannosaziduronic Acid Esters. European J Org Chem 2007. [DOI: 10.1002/ejoc.200600759] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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114
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Choi TJ, Baek JY, Jeon HB, Kim KS. A new efficient glycosylation method employing glycosyl pentenoates and PhSeOTf. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.10.158] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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115
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Baek JY, Choi TJ, Jeon HB, Kim KS. A Highly Reactive and Stereoselective β-Mannopyranosylation System: Mannosyl 4-Pentenoate/PhSeOTf. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200602642] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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116
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Abstract
The total synthesis of agelagalastatin, an antineoplastic glycosphingolipid, has been achieved. The synthesis involved an alpha-selective glycosylation of the ceramide moiety with the trisaccharide fluoride. The trisaccharide component was constructed employing the CB glycoside method which permitted a completely alpha-stereoselective galactofuranosylation.
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Affiliation(s)
- Yong Joo Lee
- Center for Bioactive Molecular Hybrids and Department of Chemistry, Yonsei University, Seoul 120-749, Korea
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117
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Hotha S, Kashyap S. Propargyl Glycosides as Stable Glycosyl Donors: Anomeric Activation and Glycoside Syntheses. J Am Chem Soc 2006; 128:9620-1. [PMID: 16866502 DOI: 10.1021/ja062425c] [Citation(s) in RCA: 168] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The advantages of stable glycosyl donors for saccharide coupling are many, and we describe herein the utility of propargyl glycosides for anomeric activation and glycoside synthesis exploiting the alkynophilicity of AuCl3. Various aglycones were reacted with propargyl glycosides, resulting in the formation of an alpha,beta-mixture of glycosides and disaccharides in good yields.
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Affiliation(s)
- Srinivas Hotha
- Division of Organic Chemistry: Synthesis, Combi Chem-Bio Resource Center, National Chemical Laboratory, Pune 411 008, India.
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118
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Lee YJ, Baek JY, Lee BY, Kang SS, Park HS, Jeon HB, Kim KS. 2′-Carboxybenzyl glycosides: glycosyl donors for C-glycosylation and conversion into other glycosyl donors. Carbohydr Res 2006; 341:1708-16. [PMID: 16616900 DOI: 10.1016/j.carres.2006.03.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2006] [Revised: 03/08/2006] [Accepted: 03/13/2006] [Indexed: 11/19/2022]
Abstract
Glycosylation of various glycosyl acceptors with 2'-carboxybenzyl (CB) 2,3,4,6-tetra-O-benzyl-beta-D-glucopyranoside and CB 2,3,4,6-tetra-O-benzyl-alpha-D-mannopyranoside as glycosyl donors afforded alpha-C-glycosides exclusively or predominantly in good yields. CB glycosides were also converted to other well-known glycosyl donors, the corresponding phenyl thioglycoside and the glycosyl fluoride derivatives.
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Affiliation(s)
- Yong Joo Lee
- Center for Bioactive Molecular Hybrids and Department of Chemistry, Yonsei University, Seoul 120-749, Republic of Korea
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119
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Lee BR, Jeon JM, Jung JH, Jeon HB, Kim KS. Synthesis of the tetrasaccharide repeat unit of the O-antigen polysaccharide from Escherichia coli O77 employing the 2′-carboxybenzyl glycoside. CAN J CHEM 2006. [DOI: 10.1139/v06-030] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The synthesis of the suitably protected form (1) of the tetrasaccharide repeat unit, →2)-α-D-Manp-(1→2)-β-D-Manp-(1→3)-α-D-GlcpNAc-(1→6)-α-D-Manp-(1→ (A), of the O-antigen polysaccharide of the lipopolysaccharide from Escherichia coli O77 has been accomplished by latentactive glycosylation employing the 2′-carboxybenzyl (CB) gly coside method. In addition to previously used latent glycosyl donors, 2′-(benzyloxycarbonyl)benzyl (BCB) glycosides, new latent glycosyl donors, 2'-(allyloxycarbonyl)benzyl (ACB) glycosides, have been introduced as a direct precursor for the active CB glycosides. We also demonstrate that 4,6-O-benzylidene-2-azido-2-deoxy-α-D-mannopyranoside (7) has been readily prepared from D-glucosamine in good yield.Key words: Escherichia coli O77, glycosylation, 2′-carboxybenzyl (CB) glycosides, 2′-(allyloxycarbonyl)benzyl (ACB) glycosides, glycosyl donor.
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120
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Lee JC, Pan GR, Kulkarni SS, Luo SY, Liao CC, Hung SC. 2-Allyloxyphenyl glycoside as a new and stable type of glycosyl donors. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2005.12.127] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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121
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Mandai H, Mukaiyama T. 6-Nitro-2-benzothiazolyl α-Mannoside: A Highly Efficient Mannosyl Donor in Constructing β-Man(1→4)GlcN Linkage and Its Application to the Synthesis of the Pentasaccharide Core ofN-Glycans. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2006. [DOI: 10.1246/bcsj.79.479] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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122
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Crich D, Jayalath P. 2-O-propargyl ethers: readily cleavable, minimally intrusive protecting groups for beta-mannosyl donors. Org Lett 2006; 7:2277-80. [PMID: 15901188 DOI: 10.1021/ol050680g] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text]. The use of 2-O-propargyl ethers as protecting groups in 4,6-O-benzylidene-protected mannopyranosyl donors bearing either bulky silyl groups or glycosidic linkages on O3 overcomes the poor stereoselectivity achieved with the corresponding 2-O-benzyl ethers, due to a reduction of steric buttressing. Deprotection is conducted by treatment with potassium tert-butoxide followed by catalytic osmium tetroxide and N-methylmorpholine N-oxide.
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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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123
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Tsuda T, Arihara R, Sato S, Koshiba M, Nakamura S, Hashimoto S. Direct and stereoselective synthesis of β-d-mannosides using 4,6-O-benzylidene-protected mannosyl diethyl phosphite as a donor. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.08.090] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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124
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Nagai H, Sasaki K, Matsumura S, Toshima K. Environmentally benign beta-stereoselective glycosidations of glycosyl phosphites using a reusable heterogeneous solid acid, montmorillonite K-10. Carbohydr Res 2005; 340:337-53. [PMID: 15680589 DOI: 10.1016/j.carres.2004.11.025] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2004] [Accepted: 11/17/2004] [Indexed: 11/23/2022]
Abstract
Environmentally benign and stereoselective beta-glycosidations of glycopyranosyl phosphites and alcohols using a reusable heterogeneous solid acid, montmorillonite K-10, as an activator have been developed. By these glycosidations, beta-gluco-, 2-deoxy-beta-gluco-, and beta-mannopyranosides were selectively produced in good to high yields.
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Affiliation(s)
- Hideyuki Nagai
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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125
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126
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De Meo C, Kamat MN, Demchenko AV. Remote Participation-Assisted Synthesis of ?-Mannosides. European J Org Chem 2005. [DOI: 10.1002/ejoc.200400616] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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127
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Pornsuriyasak P, Demchenko AV. Glycosyl thioimidates in a highly convergent one-pot strategy for oligosaccharide synthesis. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2004.11.029] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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128
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Crich D, Hutton TK, Banerjee A, Jayalath P, Picione J. Disarming, non-participating 2-O-protecting groups in manno- and rhamnopyranosylation: scope and limitations of sulfonates, vinylogous esters, phosphates, cyanates, and nitrates. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.tetasy.2004.11.032] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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129
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Sato KI, Akai S, Yoshitomo A, Takai Y. An improved method for synthesizing antennary β-d-mannopyranosyl disaccharide units. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2004.09.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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130
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Masuoka J. Surface glycans of Candida albicans and other pathogenic fungi: physiological roles, clinical uses, and experimental challenges. Clin Microbiol Rev 2004; 17:281-310. [PMID: 15084502 PMCID: PMC387410 DOI: 10.1128/cmr.17.2.281-310.2004] [Citation(s) in RCA: 122] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Although fungi have always been with us as commensals and pathogens, fungal infections have been increasing in frequency over the past few decades. There is a growing body of literature describing the involvement of carbohydrate groups in various aspects of fungal disease. Carbohydrates comprising the cell wall or capsule, or as a component of glycoproteins, are the fungal cell surface entities most likely to be exposed to the surrounding environment. Thus, the fungus-host interaction is likely to involve carbohydrates before DNA, RNA, or even protein. The interaction between fungal and host cells is also complex, and early studies using whole cells or crude cell fractions often produced seemingly conflicting results. What was needed, and what has been developing, is the ability to identify specific glycan structures and determine how they interact with immune system components. Carbohydrate analysis is complicated by the complexity of glycan structures and by the challenges of separating and detecting carbohydrates experimentally. Advances in carbohydrate chemistry have enabled us to move from the foundation of composition analysis to more rapid characterization of specific structures. This, in turn, will lead to a greater understanding of how fungi coexist with their hosts as commensals or exist in conflict as pathogens.
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Affiliation(s)
- James Masuoka
- Department of Pathology, University of Virginia, Charlottesville, Virginia 22908-0904, USA.
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131
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Synthesis and Glycosylation of 2'-(Benzyloxycarbonyl)benzyl Glycosides as Glycosyl Donors. B KOREAN CHEM SOC 2004. [DOI: 10.5012/bkcs.2004.25.1.139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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132
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Nagai H, Matsumura S, Toshima K. Environmentally benign and stereoselective formation of beta-mannosidic linkages utilizing 2,3-di-O-benzyl-4,6-O-benzylidene-protected mannopyranosyl phosphite and montmorillonite K-10. Carbohydr Res 2003; 338:1531-4. [PMID: 12860423 DOI: 10.1016/s0008-6215(03)00234-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
An environmentally benign and stereoselective beta-mannopyranosylation has been developed employing 4,6-O-benzylidene-protected mannopyranosyl diethyl phosphite as a glycosyl donor and montmorillonite K-10 as an activator.
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Affiliation(s)
- Hideyuki Nagai
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-852, Japan
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133
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134
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Hashimoto S, Tsuda T, Sato S, Nakamura S. Direct and Stereoselective Construction of b-Mannosidic Linkages Capitalizing on 4,6-O-Benzylidene-protected D-Manno- pyranosyl Diethyl Phosphite. HETEROCYCLES 2003. [DOI: 10.3987/com-02-s80] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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