51
|
Intramolecular C-glycosylation of 2-O-benzylated pentenyl mannopyranosides: remarkable 1,2-trans stereoselectivity. Tetrahedron Lett 2003. [DOI: 10.1016/j.tetlet.2003.10.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
52
|
|
53
|
Dellagreca M, Fiorentino A, Monaco P, Previtera L, Temussi F, Zarrelli A. Synthesis of degraded cyanogenic glycosides from Sambucus nigra. Nat Prod Res 2003; 17:177-81. [PMID: 12737401 DOI: 10.1080/1057563021000040772] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Two natural cyanohydrins, isolated from Sambucus nigra, have been synthesised from mandelonitrile and penta-O-acetyl-beta-galactopyranose. The synthesis confirmed the stereochemistry of the compounds, which had been assigned on biogenetic grounds.
Collapse
Affiliation(s)
- Marina Dellagreca
- Dipartimento di Chimica Organica e Biochimica, Università Federico II, Complesso Universitario Monte S. Angelo, Via Cinthia, 1-80134 Napoli, Italy
| | | | | | | | | | | |
Collapse
|
54
|
Kobayashi M. The arabinofuranoside method, a convenient substitute of the fucofuranoside method for determining the absolute configuration of the secondary alcohols. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)01248-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
55
|
Unger FM. The chemistry of oligosaccharide ligands of selectins: significance for the development of new immunomodulatory medicines. Adv Carbohydr Chem Biochem 2002; 57:207-435. [PMID: 11836943 DOI: 10.1016/s0065-2318(01)57018-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- F M Unger
- Institute of Chemistry and Center for Ultrastructure Research, Agricultural University, Vienna, Austria
| |
Collapse
|
56
|
Yamada H, Hayashi T. A substrate-unspecified glycosylation reaction promoted by copper(II) trifluoromethanesulfonate in benzotrifluoride. Carbohydr Res 2002; 337:581-5. [PMID: 11909590 DOI: 10.1016/s0008-6215(02)00029-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A glycosylation reaction induced by copper(II) trifluoromethanesulfonate is described. Using benzotrifluoride as the reaction solvent, five kinds of glycosyl donors, a glucosyl chloride, a fluoride, a trichloroacetimidate, a 1-O-acetyl compound, and a lactol were activated to give the corresponding glucosides.
Collapse
Affiliation(s)
- Hidetoshi Yamada
- School of Science, Kwansei Gakuin University, 2-1 Gakuen, Sanda 669-1337, Japan.
| | | |
Collapse
|
57
|
Wittmann V, Lennartz D. Copper(II)‐Mediated Activation of Sugar Oxazolines: Mild and Efficient Synthesis of β‐Glycosides of
N
‐Acetylglucosamine. European J Org Chem 2002. [DOI: 10.1002/1099-0690(200204)2002:8<1363::aid-ejoc1363>3.0.co;2-#] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Valentin Wittmann
- Institut für Organische Chemie, Johann Wolfgang Goethe‐Universität, Marie‐Curie‐Str. 11, 60439 Frankfurt am Main, Germany, Fax: (internat.) + 49‐(0)69/798‐29148
| | - Dirk Lennartz
- Institut für Organische Chemie, Johann Wolfgang Goethe‐Universität, Marie‐Curie‐Str. 11, 60439 Frankfurt am Main, Germany, Fax: (internat.) + 49‐(0)69/798‐29148
| |
Collapse
|
58
|
Sherman AA, Yudina ON, Mironov YV, Sukhova EV, Shashkov AS, Menshov VM, Nifantiev NE. Study of glycosylation with N-trichloroacetyl-D-glucosamine derivatives in the syntheses of the spacer-armed pentasaccharides sialyl lacto-N-neotetraose and sialyl lacto-N-tetraose, their fragments, and analogues. Carbohydr Res 2001; 336:13-46. [PMID: 11675024 DOI: 10.1016/s0008-6215(01)00213-0] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The syntheses of 2-aminoethyl glycosides of the pentasaccharides Neu5Ac-alpha(2-->3)-Gal-beta(1-->4)-GlcNAc-beta(1-->3)-Gal-beta(1-->4)-Glc and Neu5Ac-alpha(2-->3)-Gal-beta(1-->3)-GlcNAc-beta(1-->3)-Gal-beta(1-->4)-Glc, their asialo di-, tri-, and tetrasaccharide fragments, and analogues included a systematic study of glycosylation with variously protected mono- and disaccharide donors derived from N-trichloroacetyl-D-glucosamine of galactose, lactose, and lactosamine glycosyl acceptors bearing benzoyl protection around the OH group to be glycosylated. Despite the low reactivity of these acceptors, stereospecificity and good to excellent yields were obtained with NIS-TfOH-activated thioglycoside donors of such type, or with AgOTf-activated glycosyl bromides, while other promotors, as well as a trichloroacetimidate donor, were less effective, and a beta-acetate donor was inactive. In NIS-TfOH-promoted glycosylation with the thioglycosides, the use of TfOH in catalytic amount led to rapid formation of the corresponding oxazoline, but the quantity of TfOH necessary for further efficient coupling with an acceptor depended on the reactivity of the donor, varying from 0.07 equiv for a 3,6-di-O-benzylated monosaccharide derivative to 2.1 equiv for a peracetylated disaccharide one. In the glycosylation products, the N-trichloroacetyl group was easily converted into N-acetyl by alkaline hydrolysis followed by N-acetylation.
Collapse
Affiliation(s)
- A A Sherman
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky prospect 47, B-334 119991, Moscow, Russia
| | | | | | | | | | | | | |
Collapse
|
59
|
Arakawa K, Eguchi T, Kakinuma K. 36-Membered Macrocyclic Diether Lipid is Advantageous for Archaea to Thrive under the Extreme Thermal Environments. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2001. [DOI: 10.1246/bcsj.74.347] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
60
|
Yang Z, Lin W, Yu B. Rearrangement of sugar 1,2-orthoesters to glycosidic products: a mechanistic implication. Carbohydr Res 2000; 329:879-84. [PMID: 11125831 DOI: 10.1016/s0008-6215(00)00242-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The identification of cross-over products in the rearrangement of two structurally similar sugar 1,2-orthoesters to glycosidic products is reported.
Collapse
Affiliation(s)
- Z Yang
- State Key Laboratory of Bio-organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, PR China
| | | | | |
Collapse
|
61
|
Pertel SS, Chirva VY, Kadun AL, Kakayan ES. The application of the intermediate 2-methyl-glyco-[2,1-d]-2-oxazolines for glycoside synthesis. Carbohydr Res 2000; 329:895-9. [PMID: 11125834 DOI: 10.1016/s0008-6215(00)00237-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The synthesis of 2-acylamino-2-deoxysugars 1,2-trans-glycosides is described via the oxazolinium salt generated from an O,N-acetylated 1,2-cis-glycosyl halide of 2-amino-2-deoxysugar under the conditions of halide-anion catalysis. This salt was then interacted with alcohol to form the corresponding 1,2-trans-glycoside. A method for removing the generated hydrogen chloride is described. The conditions of this synthesis allow glycosides with acid-labile functional groups to be obtained. Suppression of the anomerisation of 1,2-trans-glycosides was achieved by the introduction of N,N'-dicyclohexyl urea into the reaction medium.
Collapse
Affiliation(s)
- S S Pertel
- Department of Organic Chemistry, National Taurida University, Crimea, Ukraine.
| | | | | | | |
Collapse
|
62
|
Wimmer N, Brade H, Kosma P. Synthesis of neoglycoproteins containing D-glycero-D-talo-oct-2-ulopyranosylonic acid (Ko) ligands corresponding to core units from Burkholderia and Acinetobacter lipopolysaccharide. Carbohydr Res 2000; 329:549-60. [PMID: 11128584 DOI: 10.1016/s0008-6215(00)00213-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Glycal esters of Kdo derivatives were converted into 2,3-anhydro intermediates, which were transformed into D-glycero-D-talo-oct-2-ulopyranosylonic acid (Ko), as well as 3-O- and 4-O-p-nitrobenzoyl-Ko derivatives. The exo-allyl orthoester derivative, methyl [5,7,8-tri-O-acetyl-4-O-(4-nitrobenzoyl)-2,3-O-[(1-exo-allyloxy)-ethylidene]-D-glycero-beta-D-talo-oct-2-ulopyranos]onate, prepared from the 4-O-pNBz-protected Ko derivative, was elaborated into the alpha-Ko allyl ketoside, the reducing disaccharide alpha-Kdop-(2-->4)-Ko and the disaccharide alpha-Kdop-(2-->4)-Kop-(2-->OAll). Conversely, methyl[4,5,7,8-tetra-O-acetyl-3-O-(4-nitrobenzoyl)-alpha-D-glycero-D-talo-2-octulopyranosyl bromide]onate [Carbohydr. Res., 244 (1993) 69-84], was coupled with a Kdo acceptor to give the disaccharide alpha-Kop-(2-->4)-Kdop-(2-->OAll) after orthoester rearrangement and deprotection. The allyl glycosides were treated with cysteamine and converted into neoglycoproteins. The ligands correspond to inner core units from Acinetobacter haemolyticus and Burkholderia cepacia lipopolysaccharides.
Collapse
Affiliation(s)
- N Wimmer
- Institute of Chemistry, University of Agricultural Sciences, Vienna, Austria
| | | | | |
Collapse
|
63
|
Toshima K, Maeda Y, Ouchi H, Asai A, Matsumura S. Carbohydrate-modulated DNA photocleavage: design, synthesis, and evaluation of novel glycosyl anthraquinones. Bioorg Med Chem Lett 2000; 10:2163-5. [PMID: 11012020 DOI: 10.1016/s0960-894x(00)00410-8] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Novel and artificial anthraquinone-carbohydrate hybrids were designed and synthesized, and found to effectively cleave DNA under irradiation with a long wavelength UV light and also exhibit cytotoxicity against HeLa S3 cells.
Collapse
Affiliation(s)
- K Toshima
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama, Japan.
| | | | | | | | | |
Collapse
|
64
|
Rousseau C, Martin OR. Synthesis of bergenin-related natural products by way of an intramolecular C-glycosylation reaction. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s0957-4166(99)00484-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
65
|
Xia J, Piskorz CF, Locke RD, Chandrasekaran EV, Alderfer JL, Matta KL. An efficient synthesis of two monosulfated trisaccharides with the Galbeta1,3GlcNacbeta1,3Galbeta-O-allyl backbone. Bioorg Med Chem Lett 1999; 9:2941-6. [PMID: 10571152 DOI: 10.1016/s0960-894x(99)00507-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The GlcNAcbeta(1-->3) Gal linked disaccharide 7 was synthesized as key building blocks for the construction of target monosulfated trisaccharides 1 and 2 using oxazoline 3 as glycosyl donor promoted by BF3 x Et2O.
Collapse
Affiliation(s)
- J Xia
- Department of Molecular & Cellular Biophysics, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | | | | | | | | | | |
Collapse
|
66
|
Seifert J, Ogawa T, Ito Y. Syntheses of α-dystroglycan derived sialylated glycosyl amino acids carrying a novel mannosyl serine/threonine linkage. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)01361-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
67
|
Hiranuma S, Kanie O, Wong CH. Formation of the 1,2,6-orthoester of mannose and its utilization in the glycosylation reaction. Tetrahedron Lett 1999. [DOI: 10.1016/s0040-4039(99)01193-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
68
|
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
| |
Collapse
|
69
|
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]
|
70
|
Wakao M, Nakai Y, Fukase K, Kusumoto S. Novel Dehydrative Glycosylation by Using Acid Anhydride and TMSClO4. CHEM LETT 1999. [DOI: 10.1246/cl.1999.27] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
71
|
Grindley TB. Applications of tin-containing intermediates to carbohydrate chemistry. Adv Carbohydr Chem Biochem 1998; 53:17-142. [PMID: 9710969 DOI: 10.1016/s0065-2318(08)60043-8] [Citation(s) in RCA: 141] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- T B Grindley
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada
| |
Collapse
|
72
|
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
| | | |
Collapse
|
73
|
Timmers CM, van Straten NC, van der Marel GA, van Boom JH. An Expeditious Route toStreptococciandEnterococciGlycolipidsViaRing-Opening of 1,2-Anhydrosugars with Protic Acids. J Carbohydr Chem 1998. [DOI: 10.1080/07328309808002906] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
74
|
Franck RW, Marzabadi CH. Novel Bicylic Donors for the Synthesis of 2-Deoxy-β-Glycosides. J Org Chem 1998. [DOI: 10.1021/jo971934h] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Richard W. Franck
- Department of Chemistry, Hunter College/CUNY, 695 Park Avenue, New York, New York 10021
| | - Cecilia H. Marzabadi
- Department of Chemistry, Hunter College/CUNY, 695 Park Avenue, New York, New York 10021
| |
Collapse
|
75
|
Sanders WJ, Manning DD, Koeller KM, Kiessling LL. Synthesis of sulfated trisaccharide ligands for the selectins. Tetrahedron 1997. [DOI: 10.1016/s0040-4020(97)01024-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
76
|
Hashimoto SI, Sakamoto H, Honda T, Abe H, Nakamura SI, Ikegami S. “Armed-disarmed” glycosidation strategy based on glycosyl donors and acceptors carrying phosphoroamidate as a leaving group: A convergent synthesis of globotriaosylceramide. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)10365-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
77
|
|
78
|
Valdor JF, Mackie W. Synthesis of a Trisaccharide Repeating Unit Related to Arabinogalactan-Protein (AGP) Polysaccharides1. J Carbohydr Chem 1997. [DOI: 10.1080/07328309708007326] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
79
|
Bendas G, Vogel J, Bakowski U, Krause A, Müller J, Rothe U. A liposome-based model system for the simulation of lectin-induced cell adhesion. BIOCHIMICA ET BIOPHYSICA ACTA 1997; 1325:297-308. [PMID: 9168155 DOI: 10.1016/s0005-2736(96)00268-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A parallel plate flow chamber with defined wall shear rates was developed in order to study and simulate cellular adhesion to biological membranes as mediated by lectin/carbohydrate interactions. Planar bilayers containing clustered areas of various long-chain alkyl mannosides as carbohydrate ligands and supported on transparent materials were used as model membranes. Their interaction with liposomes bearing Concanavalin A as model cells was observed fluorimetrically by confocal laser scanning microscopy. The use of supported membranes made it possible to study the dependence of adhesion upon different physicochemical parameters of membranes. The liposomes of this model were able to simulate the lectin-mediated adhesion of cells in a shear flow. Once specific receptor-mediated adhesion had taken place, liposomes tended to attach irreversibly to the membrane. This could be avoided by employing lipid compositions which represent a special balance between charged and polyethylene glycol-coupled lipids. This is discussed in term of the interplay between the various attractive and repulsive forces at membrane surfaces. The dependence of liposome adhesion upon the shear rate could be detected. These results were used to evaluate binding forces between lectin-bearing liposomes and ligand-containing planar bilayers.
Collapse
Affiliation(s)
- G Bendas
- Department of Pharmacy, Martin Luther University Halle, Germany.
| | | | | | | | | | | |
Collapse
|
80
|
Kobayashi M. The Fucofuranoside Method, a New 1 H and 13 C Nuclear Magnetic Resonance Method to Determine the Absolute Configuration of Secondary Alcohols. Tetrahedron 1997. [DOI: 10.1016/s0040-4020(97)00291-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
81
|
Lindhorst TK. An Unusual Side Reaction in the Rearrangement of 3,4,6-Tri-O-Acetyl-1,2-O-(Allyloxyethylidene)-β-D-Mannopyranose with TMS-Triflate: Formation of an α(1→2)-Linked Disaccharide. J Carbohydr Chem 1997. [DOI: 10.1080/07328309708006524] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
82
|
Wessel HP, Trumtel M. Pivalates in the selective protection and activation of maltose for the synthesis of sulfated 3-deoxy-maltosyl-(1-->4)-alpha, alpha-trehalose. Carbohydr Res 1997; 297:163-8. [PMID: 9060183 DOI: 10.1016/s0008-6215(96)00262-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Pivaloylation of maltose gave, in satisfactory yield, 1,2,6,2',3',4',6'-hepta-O-pivaloyl-beta-maltose which was converted to the 3-deoxygenated analogue in a Barton-McCombie reaction. This compound was used directly in a trimethylsilyl triflate-mediated glycosylation reaction with 2,3,6-tri-O-benzyl-alpha-D-glucopyranosyl 2,3-di-O-benzyl-4,6-O-benzylidene-alpha-D-glucopyranoside to give the corresponding maltosyl-(1-->4)-alpha, alpha-trehalose derivative. After deprotection, the monodeoxygenated tetrasaccharide was sulfated; in the reaction product, one compound fully sulfated at the outer pyranose rings predominated.
Collapse
Affiliation(s)
- H P Wessel
- F. Hoffmann-La Roche Ltd., Pharma Division, Basel, Switzerland
| | | |
Collapse
|
83
|
Kirschning A, Bechthold AFW, Rohr J. Chemical and biochemical aspects of deoxysugars and deoxysugar oligosaccharides. Top Curr Chem (Cham) 1997. [DOI: 10.1007/bfb0119234] [Citation(s) in RCA: 148] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
84
|
Morishima N, Mori Y. Synthesis of glycyrrhizin analogues containing fluorinated beta(1-->2)-linked disaccharides. Bioorg Med Chem 1996; 4:1799-808. [PMID: 9007265 DOI: 10.1016/s0968-0896(96)00169-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
For studies on the recognition mechanisms for Glycyrrhizin-induced biological activities, seven Glycyrrhizin analogues with 3'-, 4'-, 6'-, 3-, and 4-fluorinated 2-O-beta-D-glucopyranosyl-beta-D-glucopyranoses (1-5) and 3- and 4-fluorinated 2-O-beta-D-glucopyranuronosyl-beta-D-glucopyranoses (6 and 7) were synthesized through a stepwise glycosylation procedure. 1,2-Di-O-acetyl-4,6-di-O-benzyl-3-deoxy-3-fluoro- (13) and 1,2-di-O-acetyl-3,6-di-O-benzyl-4-deoxy-4-fluoro-D-glucopyranose (14) were employed for the first beta-glycosylation of methyl glycyrrhetate, promoted with trimethylsilyl trifluoromethanesulfonate.
Collapse
Affiliation(s)
- N Morishima
- School of Nursing, Kitasato University, Sagamihara, Japan
| | | |
Collapse
|
85
|
Kuwahara R, Tsuchiya T. Synthesis of dibekacin analogs containing 3-oxa- and 3-aza-2,3,4-trideoxy-D-glycero-hexopyranose. Carbohydr Res 1996; 293:15-20. [PMID: 8916543 DOI: 10.1016/0008-6215(96)00176-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
6-O-(3-Oxa-2,3,4-trideoxy-alpha-D-glycero-hexopyranosyl) derivatives (10 and 17) of both 3',4'-dideoxyneamine and 5-epifluoro-5,3',4'-trideoxyneamine have been prepared by coupling ethyl 6-O-benzyl-3-oxa-2,3,4-trideoxy-1-thio-D-glycero-hexopyranoside (5) with suitable aglycons. The corresponding 3"-aza derivative (19) of dibekacin (6) was prepared by oxidation of 1,3,2',6'-tetra-N-tosyldibekacin (7) with Pb(OAc)4 followed by treatment with NH4OAc and reduction with NaBH3CN. Related ring-opening compounds (11 and 25) were also prepared.
Collapse
Affiliation(s)
- R Kuwahara
- Institute of Bioorganic Chemistry, Kawasaki, Japan
| | | |
Collapse
|
86
|
Chenault HK, Castro A, Chafin LF, Yang J. The Chemistry of Isopropenyl Glycopyranosides. Transglycosylations and Other Reactions. J Org Chem 1996. [DOI: 10.1021/jo960190p] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- H. Keith Chenault
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716
| | - Alfredo Castro
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716
| | - Laura F. Chafin
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716
| | - Jie Yang
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716
| |
Collapse
|
87
|
Duus JO, Nifant'ev N, Shashkov AS, Khatuntseva EA, Bock K. Synthesis and structural studies of branched 2-linked trisaccharides related to blood group determinants. Carbohydr Res 1996; 288:25-44. [PMID: 8765726 DOI: 10.1016/s0008-6215(96)90773-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A series of trisaccharide glycosides, Fuc-(1 reversible 2)-beta-Gal-(1 reversible 3)-beta-X-OMe (X = GlcNAc, Glc, 2-deoxy-Glc) related to the blood group determinant Le(d) have been synthesised both as their alpha- and beta-Fuc anomers together with the component disaccharide starting compounds. The conformational properties of the six trisaccharides together with their parent disaccharides have been investigated by NMR spectroscopy (proton and carbon chemical shifts and proton NOEs) in combination with computer modeling using the Monte Carlo approach and the HSEA force field using the GEGOP programme. The interaction between the terminal fucose unit and the reducing unit was probed by substitution of bulky NAc group with hydroxyl and deoxy substituents, respectively. Compounds with severe steric interactions were identified by the non-additivity of their carbon chemical shifts. This was subsequently confirmed by the detailed conformational assessment by NOE spectroscopy and computer modeling. The most severe contacts arose in the alpha-L-Fuc derivatives, whereas the beta-linked L-Fuc derivatives only in one case exhibit severe steric interaction as probed by the NMR parameters.
Collapse
Affiliation(s)
- J O Duus
- Department of Chemistry, Carlsberg Laboratory, Copenhagen, Denmark
| | | | | | | | | |
Collapse
|
88
|
Kuwahara R, Tsuchiya T. Synthesis of kanamycin A analogs containing 6-amino-3-oxa-2,3,4,6-tetradeoxy-D- and -L-glycero-hexopyranose. Carbohydr Res 1996; 286:107-22. [PMID: 8925510 DOI: 10.1016/0008-6215(96)00051-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
6-Azido-3-oxa-2,3,4,6-tetradeoxy-D- and -L-glycero-hexopyranoses were synthesized in five steps from (2S)-and (2R)-1,2-O-isopropylideneglycerols, respectively. After conversion into the corresponding ethyl 1-thioglycosides, each was condensed with a protected derivative of 6-O-(3-amino-3-deoxy-alpha-D-glucopyranosyl)-2-deoxystreptamine (16). Deprotection and reduction of the azido group of the condensation products gave the title compounds.
Collapse
Affiliation(s)
- R Kuwahara
- Institute of Bioorganic Chemistry, Kawasaki, Japan
| | | |
Collapse
|
89
|
Synthetic glycolipids as membrane-bound cryoprotectants in the freezedrying process of liposomes. Eur J Pharm Sci 1996. [DOI: 10.1016/0928-0987(95)00054-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
90
|
Eberling J, Braun P, Kowalczyk D, Schultz M, Kunz H. Chemoselective Removal of Protecting Groups from O-Glycosyl Amino Acid and Peptide (Methoxyethoxy)ethyl Esters Using Lipases and Papain. J Org Chem 1996; 61:2638-2646. [PMID: 11667093 DOI: 10.1021/jo951899j] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The selective C-terminal deprotection of O-glycopeptide (methoxyethoxy)ethyl esters is achieved under mild conditions (pH 6.6, 37 degrees C) by enzymatic hydrolysis using papain or lipase M from Mucor javanicus to give building blocks useful for chain-extending glycopeptide synthesis. On the other hand, the selective removal of acetyl protecting groups from the saccharide portion of glycopeptides is accomplished by alternative enzymatic hydrolysis with lipase WG from wheat germ to furnish model substrates for enzymatic glycosyl transfer reactions in order to extend the carbohydrate side chain of these conjugates.
Collapse
Affiliation(s)
- Jörg Eberling
- Institut für Organische Chemie, Johannes Gutenberg-Universität Mainz, Becher Weg 18-22, D-55099 Mainz, Germany
| | | | | | | | | |
Collapse
|
91
|
Yu B, Ouyang Q, Li C, Hui Y. The Tmsotf-Promoted “One Pot” β-Glycosidations of Peracetylated Chitobiose. J Carbohydr Chem 1996. [DOI: 10.1080/07328309608005654] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
92
|
Zegelaar-Jaarsveld K, Duynstee HI, van der Marel GA, van Boom JH. Iodonium ion-assisted synthesis of tetrameric fragments corresponding to the cell wall phenolic glycolipids of Mycobacterium kansasii serovars II and IV. Tetrahedron 1996. [DOI: 10.1016/0040-4020(96)00034-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
93
|
Petráková E, Glaudemans CP. Synthesis of the methyl alpha-glycosides of some isomalto-oligosaccharides specifically deoxygenated at position C-4. Carbohydr Res 1995; 279:133-50. [PMID: 8593619 DOI: 10.1016/0008-6215(95)00280-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Methyl alpha-isomaltoside and methyl alpha-isomaltotrioside specifically deoxygenated at position C-4 of various glucopyranosyl units were synthesized by condensation of either 1,6-di-O-acetyl-2,3-di-O-benzyl-4-deoxy-alpha,beta-D-xylo-hexopyranos e (7) or 1,6-di-O-acetyl-2,3,4-tri-O-benzyl-alpha,beta-D-glucopyranose (10) [mediated by silver perchlorate and tin(IV) chloride] with suitably blocked derivatives of methyl alpha-D-glucopyranoside, its 4-deoxy analog 6, or methyl 4'-deoxy alpha-isomaltoside (13), respectively.
Collapse
Affiliation(s)
- E Petráková
- NIDDK, National Institutes of Health, Bethesda, MD 20892, USA
| | | |
Collapse
|
94
|
Neumann KW, Tamura J, Ogawa T. A stereocontrolled synthetic approach to glycopeptides corresponding to the carbohydrate-protein linkage region of cell-surface proteoglycans. Bioorg Med Chem 1995; 3:1637-50. [PMID: 8770388 DOI: 10.1016/0968-0896(95)00151-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The glycopeptides 1 (Gly[O-beta-D-Xylp)-L-Ser-Gly-L-Glu) and 2 (Gly[O-[beta-D-GlcpA-(1-->3)-beta-D-Galp-(1-->3)-beta-D-Galp]-(1-- >4) -beta-D-Xylp)-L-Ser-Gly-L-Glu), carrying the core structure of serine-linked cell-surface proteoglycans were synthesized in a stereocontrolled manner. The carbohydrate key imidate xylosyl donors 3 and glycotetraosyl donors 4 and 5, as well as a tetrapeptide glycosyl acceptor 6, were coupled in the crucial glycosylation step. In these reactions, the application of either trimethylsilyl trifluoromethanesulfonate (TMSOTf) or borontrifluoride etherate (BF3-Et2O) as catalysts proved to be highly efficient. The serine linked glycopeptides 34, 36 and 37 thus obtained yielded target compounds 1 and 2 on complete deprotection.
Collapse
Affiliation(s)
- K W Neumann
- Institute of Physical and Chemical Research (RIKEN), Saitama, Japan
| | | | | |
Collapse
|
95
|
Colombo D, Panza L, Ronchetti F. The beta-D-GalpNAc-(1-->3)-D-Galp linkage through the oxazoline glycosylation method. Carbohydr Res 1995; 276:437-41. [PMID: 8542611 DOI: 10.1016/0008-6215(95)00192-v] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- D Colombo
- Dipartimento di Chimica e Biochimica Medica, Università di Milano, Italy
| | | | | |
Collapse
|
96
|
Byun HS, Bittman R. A short synthesis of antitumor ether thioglycolipids: Thioglycosidation of a glucose donor with a tributylstannyl sulfide acceptor. Tetrahedron Lett 1995. [DOI: 10.1016/0040-4039(95)01015-a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
|
97
|
Matsuoka K, Nishimura SI, Lee YC. A Facile and Quantitative Preparation of Activated Cyclic Sugar Derivatives Using HgBr2and 2,4,6-Collidine. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1995. [DOI: 10.1246/bcsj.68.1715] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
98
|
Lay L, Panza L, Russo G, Colombo D, Ronchetti F, Adobati E, Canevari S. Oligosaccharides related to tumor-associate antigens. Part 3. Synthesis of the propyl glycosides of the trisaccharide ?-D-Galp-(1?3)-?-D-GalpNAc-(1?3)-?-D-Galp and of the Tetrasaccharide ?-L-Fucp-(1?2)-?-D-Galp-(1?3)-?-D-GalpNAc-(1?3)-?-D-Galp, components of a tumor antigen recognized by the antibody MBr1. Helv Chim Acta 1995. [DOI: 10.1002/hlca.19950780302] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
99
|
Iida M, Endo A, Fujita S, Numata M, Matsuzaki Y, Sugimoto M, Nunomura S, Ogawa T. A total synthesis of glycononaosyl ceramide with a sialyl dimeric Le(x) sequence. Carbohydr Res 1995; 270:C15-9. [PMID: 7585693 DOI: 10.1016/0008-6215(95)00113-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- M Iida
- Tokyo Research Institute, NISSIN Food Products Co., Ltd., Saitama, Japan
| | | | | | | | | | | | | | | |
Collapse
|
100
|
Neighbors SM, Soine WH, Paibir SG. Synthesis of N-beta-D-glucopyranosyluronate derivatives of barbital, phenobarbital, metharbital, and mephobarbital. Carbohydr Res 1995; 269:259-72. [PMID: 7780992 DOI: 10.1016/0008-6215(94)00358-m] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The synthesis and characterization of barbital, phenobarbital, metharbital, and mephobarbital glucuronides is reported. The condensation of per(trimethylsilyl)-barbital and -phenobarbital with methyl 1,2,3,4-tetra-O-acetyl-beta-D-glucopyranuronate in the presence of trimethylsilyl trifluoromethanesulfonate gave moderate yields of the N1-(beta-D-glucopyranosyluronate) barbiturate derivatives. The diastereomers of the phenobarbital derivatives were resolved by use of C18 reversed-phase HPLC. The homologous N3-methyl barbiturate N1-glucuronates were prepared by reaction of the barbital and phenobarbital N1-glucuronate derivatives with diazomethane. The absolute configuration of the phenobarbital N1-beta-D-glucopyranuronate epimers was determined by oxidative removal of the glycon from the mephobarbital N1-beta-D-glucopyranuronate epimers to give the optical isomers of mephobarbital. The spectroscopic data for this series of compounds will facilitate the characterization of N-glycosylated imide xenobiotics that may be detected as mammalian metabolites in biodisposition studies.
Collapse
Affiliation(s)
- S M Neighbors
- Department of Medicinal Chemistry, School of Pharmacy, Virginia Commonwealth University, Richmond 23298-0540, USA
| | | | | |
Collapse
|