1
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Affiliation(s)
- Michael Martin Nielsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark
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2
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Kloosterman M, Westerduin P, van Boom JH. Synthesis of 4-O
-(3,4,6-tri-O
-acetyl-2-deoxy-2-phthalimido-β-D-glucopyranosyl)-1,6-anhydro-3-O
-(4-methoxybenzoyl)-β- D-mannopyranose: A versatile intermediate for the preparation of N,N
-diacetylchitobiose derivatives. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/recl.19861050407] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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3
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Lafont D, Boullanger P, Fenet B. Reacttvite Comparee de Divers Accepteurs de la d-Glucosamine lors de la Synthese de Precurseurs du Chitobiose. J Carbohydr Chem 2006. [DOI: 10.1080/07328309408011665] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Dominique Lafont
- a Laboratoire de Chimie Organique II , URA CNRS 463 Université Lyon I , CPE Lyon, 43 Bd du 11 Novembre 1918 F-69622, Villeurbanne Cedex, France
| | - Paul Boullanger
- a Laboratoire de Chimie Organique II , URA CNRS 463 Université Lyon I , CPE Lyon, 43 Bd du 11 Novembre 1918 F-69622, Villeurbanne Cedex, France
| | - Bernard Fenet
- b Centre Commun de Résonance Magnétique Nucléaire Université Lyon I , B[acaron]t 721, 43 Bd du 11 Novembre 1918 F-69622, Villeurbanne Cedex, France
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4
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El-Sokkary RI, Bassily RW, Youssef RH, Nashed MA. Synthesis of a Neolactotetraose Glycoside Suitable for Enzymatic Elaboration to the Sialyl Lewis X Stage. J Carbohydr Chem 2006. [DOI: 10.1080/07328309808002327] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Ramadan I. El-Sokkary
- a Department of Chemistry, Faculty of Science , Alexandria University , Ebrahemia P.O. Box 426, Alexandria, 21321, EGYPT
| | - Rafik W. Bassily
- a Department of Chemistry, Faculty of Science , Alexandria University , Ebrahemia P.O. Box 426, Alexandria, 21321, EGYPT
| | - Rimon H. Youssef
- a Department of Chemistry, Faculty of Science , Alexandria University , Ebrahemia P.O. Box 426, Alexandria, 21321, EGYPT
| | - Mina A. Nashed
- a Department of Chemistry, Faculty of Science , Alexandria University , Ebrahemia P.O. Box 426, Alexandria, 21321, EGYPT
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5
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6
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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.
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Affiliation(s)
- S S Pertel
- Department of Organic Chemistry, National Taurida University, Crimea, Ukraine.
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7
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Allylic protecting groups and their use in a complex environment part I: Allylic protection of alcohols. Tetrahedron 1997. [DOI: 10.1016/s0040-4020(97)00524-3] [Citation(s) in RCA: 134] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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Chernyak AYa, Kononov LO, Krishna PR, Kochetkov NK, Rao AV. Synthesis of lysine-containing fragments of the Proteus mirabilis O27 O-specific polysaccharide and neoglycoconjugates therefrom. Carbohydr Res 1992; 225:279-89. [PMID: 1379517 DOI: 10.1016/s0008-6215(00)90501-9] [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: 12/26/2022]
Abstract
Amide-linked lysine mono- and di-uronic acid fragments of the O-specific polysaccharide from P. mirabilis O27 have been synthesised. N epsilon-Boc-L-lysine tert-butyl ester was condensed with 2-azidoethyl glycosides of glucuronic acid and beta-D-GlcpNAc-(1----3)-beta-D-GlcpA. Transformation of the products into 2-acrylamidoethyl glycosides, followed by deprotection using trifluoroacetic acid, gave the target monomers that were converted into high-molecular-weight copolymer-type neoglycoconjugates.
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Affiliation(s)
- Chernyak AYa
- N. D. Zelinsky Institute of Organic Chemistry, Academy of Sciences of the U.S.S.R., Moscow
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9
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The Synthesis of Blood Group I and i Active Oligosaccharides. ACTA ACUST UNITED AC 1992. [DOI: 10.1016/b978-0-444-89558-5.50037-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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10
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Silwanis BA, El-Sokkary RI, Nashed MA, Paulsen H. A Comparison in the Efficiency of Six Standard 2-Amino-2-Deoxy-Glucosyl Donors for the Synthesis of (2-Deoxy-2-Phthalimido-β-D-Glucopyranosyl) (1→ 4)-β-D-Glucopyranosides. J Carbohydr Chem 1991. [DOI: 10.1080/07328309108543973] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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11
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Peracetylated chitobiose: Preparation by specific degradations of chitin, and chemical manipulations. Carbohydr Res 1989. [DOI: 10.1016/0008-6215(89)85021-9] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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Stöckl WP, Weidmann H. Synthesen und Reaktionen von 1,2-Didesoxy-Hexopyrano-[2,1-d]-Oxazolinen und -Oxazoliniumsalzen1,2. J Carbohydr Chem 1989. [DOI: 10.1080/07328308908048003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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Anisuzzaman AK, Anderson L, Navia JL. Synthesis of a close analog of the repeating unit of the antifreeze glycoproteins of polar fish. Carbohydr Res 1988; 174:265-78. [PMID: 3378230 DOI: 10.1016/0008-6215(88)85096-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The protected glycopeptide N-(benzyloxycarbonyl)-L-alanyl-[O-(2,3,4,6-tetra-O-benzoyl-beta-D- galactopyranosyl)-(1----3)-O-(2,4,6-tri-O-benzyl-alpha-D-galactopyranosy l)- (1----3)]-L-threonyl-L-alanine 2,2,2-trichloroethyl ester was made by coupling the respective disaccharide and tripeptide blocks. The disaccharide block was generated by coupling tetra-O-benzoyl-alpha-D-galactopyranosyl bromide to allyl 2,4,6-tri-O-benzyl-alpha-D-galactopyranoside and converting the product into O-(2,3,4,6-tetra-O-benzoyl-beta-D-galactopyranosyl)-(1----3)-2,4,6-tri-O -benzyl - alpha-D-galactopyranosyl chloride via the 1-propenyl glycoside and the free (1-OH) sugar. Alternatively, the 1-propenyl intermediate was obtained directly by using 1-propenyl 2,4,6-tri-O-benzyl-alpha-D-galactopyranoside as the acceptor in the initial coupling reaction. An efficient 3-step synthesis of 10 was accomplished by the dibutyltin oxide-assisted, selective crotylation of allyl alpha-D-galactopyranoside at O-3, followed by benzylation and treatment of the product with potassium tert-butoxide. The N-benzyloxycarbonyl (Z) and N-tert-butoxycarbonyl (Boc) 2,2,2-trichloroethyl esters of Thr-Ala and Ala-Thr-Ala were formed by sequential coupling. The silver triflate-promoted glycosylation of the Z-protected dipeptide and tripeptide by 2,3,4,6-tetra-O-benzyl-alpha-D-galactopyranosyl chloride, and of the tripeptide by 6, proceeded with excellent alpha-stereoselectivity. From the disaccharide tripeptide 21, the carboxyl-deprotected and fully deprotected derivatives were prepared.
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Affiliation(s)
- A K Anisuzzaman
- Department of Biochemistry, College of Agricultural and Life Sciences, University of Wisconsin, Madison 53706
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14
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Kantoci D, Keglević D, Derome AE. A convenient synthetic route to the disaccharide repeating-unit of peptidoglycan. Carbohydr Res 1987; 162:227-35. [PMID: 3594479 DOI: 10.1016/0008-6215(87)80218-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Glycosylation of the readily accessible benzyl 2-acetamido-6-O-benzyl-2-deoxy-3-O-[(R)-1-(methoxycarbonyl)ethyl]-alpha- D- glucopyranoside with 3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-beta-D-glucopyranosyl chloride (2), using the silver triflate method in the absence of a base, afforded 65-70% of the fully protected [beta-D-GlcNPhth-(1----4)-MurNAc] methyl ester derivative 4, the structure of which was ascertained on the basis of 500-MHz 1H-n.m.r. data. 2,2'-Dideoxy-2,2'-diphthalimido-beta,beta-trehalose hexa-acetate was a by-product. Removal of the Phth group from 4, followed by acetylation, yielded 90% of the acetylated 1,6-di-O-benzyl derivative 5, which, on saponification and catalytic hydrogenation, afforded 2-acetamido-4-O-(2-acetamido-2-deoxy-beta-D-glucopyranosyl)-3-O-[(R)-1- carboxyethyl]-2-deoxy-D-glucopyranose. Similarly, 5 was converted into the acetylated methyl ester derivative, which, on selective removal of the methyl ester group, gave benzyl 2-acetamido-4-O-(2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-beta-D- glucopyranosyl)-6-O-benzyl-3-O-[(R)-1-carboxyethyl]-2-deoxy-alpha-D- glucopyranoside. An alternative route for the preparation of 2 is described.
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15
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Chowdhary MS, Navia JL, Anderson L. The assembly of oligosaccharides from "standardized intermediates": beta-(1----3)-linked oligomers of D-galactose. Carbohydr Res 1986; 150:173-85. [PMID: 3756955 DOI: 10.1016/0008-6215(86)80014-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Several 2-O-benzoyl-4,6-di-O-benzyl-3-O-R-alpha-D-galactopyranosyl chlorides, designed as general precursors of beta-linked, interior D-galactopyranosyl residues in oligosaccharides, were tested in a sequential synthesis of the galactotriose beta-D-Galp-(1----3)-beta-D-Galp-(1----3)-D-Gal (19). The chlorides having R = tetrahydro-2-pyranyl and tert-butyldimethylsilyl gave excellent results, whereas those having R = 3-benzoylpropionyl and chloroacetyl were unsatisfactory. An activated disaccharide block (17), having R = 2,3-di-O-benzoyl-4,6-di-O-benzyl-beta-D-galactopyranosyl, was also prepared and tested as a glycosyl donor. The coupling of 17 to 1-propenyl 2-O-benzoyl-4,6-di-O-benzyl-alpha-D-galactopyranoside (14), in the molar ratio 1.13:1, gave 64% of a trisaccharide derivative (18) that could be converted into 19. This latter synthesis of 19 is efficient because all three galactose units are derived from 14 or its immediate precursor.
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16
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Synthesis of di-, tri-, and tetra-saccharides corresponding to receptor structures recognised by Streptococcus pneumoniae. Carbohydr Res 1985. [DOI: 10.1016/0008-6215(85)85219-8] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Kiso M, Anderson L. Protected glycosides and disaccharides of 2-amino-2-deoxy-D-glucopyranose by ferric chloride-catalyzed coupling. Carbohydr Res 1985; 136:309-23. [PMID: 4005891 DOI: 10.1016/0008-6215(85)85205-8] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The ferric chloride-catalyzed glycosylation of hydroxy compounds by protected 2-acylamino-2-deoxy-beta-D-glucopyranose 1-acetates is described. In addition to known glycosides from the reaction of alcohols with 2-acetamido-1,3,4,6-tetra-O-acetyl-2-deoxy-beta-D-glucopyranose (3), ally (and other alkyl) beta-glycosides were obtained from the N-benzoyl, N-phenoxyacetyl, N-methoxyacetyl, N-chloroacetyl, and N-phthaloyl congeners of 3. The latter compounds, except for the N-phthaloyl derivative, gave oxazolines in the absence of an alcoholic reactant. Compound 3 and the related N-benzoyl, N-chloroacetyl, N-acetyl-3,4,6-tri-O-benzyl, and N-acetyl-4-O-acetyl-3,6-di-O-benzyl derivatives were coupled to one or more protected sugars to form protected, beta-linked disaccharides. Coupling at the 6-positions of acceptors proceeded smoothly and gave 67-80% yields. For successful coupling at positions 3 and 4, long reaction times and multiple additions of glycosyl donor were required, and yields ranged from 60% to as low as 30%. 1,3,4,6-Tetra-O-acetyl-2-(chloroacetamido)-2-deoxy-beta-D- glucopyranose appeared to be the most reactive glycosyl donor in this series. The reaction of 2-methyl-(3,4,6-tri-O-acetyl-1,2-dideoxy-alpha-D-glucopyrano)[2,1- d]-2-oxazoline (derived from 3) with allyl alcohol was catalyzed by ferric chloride, and oxazolines were detected as intermediates in some of the glycosylations of protected sugars.
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18
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el Sadek MM, Warren CD, Jeanloz RW. 4-O-Acetyl-3,6-di-O-benzyl-2-deoxy-2-phthalimido-α,β-d-glucopyranosyl chloride as a glycosyl donor. Carbohydr Res 1984; 131:166-74. [PMID: 6548405 DOI: 10.1016/0008-6215(84)85414-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Synthese der invarianten pentasaccharid-core-region der kohlenhydrat-ketten der N-glycoproteine. Carbohydr Res 1984. [DOI: 10.1016/0008-6215(84)85272-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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Warren CD, Milat ML, Augé C, Jeanloz RW. The synthesis of a trisaccharide and a tetrasaccharide lipid intermediate. P1-dolichyl P2-[O-beta-D-mannopyranosyl-(1----4)-O-(2-acetamido-2-deoxy- beta-D-glucopyranosyl)-(1----4)-2-acetamido-2-deoxy-alpha-D- glucopyranosyl] diphosphate and P1-dolichyl P2-[O-alpha-D-mannopyranosyl-(1----3)-O-beta-D- mannopyranosyl-(1----4)-O-(2-acetamido-2-deoxy-beta-D-glucopyranosyl)- (1----4)-2-acetamido-2-deoxy-alpha-D-glucopyranosyl] diphosphate. Carbohydr Res 1984; 126:61-80. [PMID: 6713432 DOI: 10.1016/0008-6215(84)85126-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Synthetic benzyl O-(2,3,4,6,-tetra-O-acetyl-beta-D-mannopyranosyl)-(1-4)- (2-acetamido-3,6-di-O-acetyl-2-deoxy-beta-D-glucopyranosyl)-(1-4)- 2-acetamido-3,6-di-O-benzyl-2-deoxy-alpha-D-glucopyranoside was converted, by catalytic hydrogenolysis of the benzyl groups, followed by treatment with acetyl chloride-hydrogen chloride and then "chloride-ion catalysis", into O-(2,3,4,6-tetra-O-acetyl- beta-D-mannopyranosyl)-(1-4)-O-(2-acetamido-3,6-di-O-acetyl-2-deoxy beta- D-glucopyranosyl)- (1-4)-2-methyl-(3,6-di-O-acetyl-1,2-dideoxy-alpha-D- glucopyrano)-[2,1-d]-2-oxazoline. This compound was phosphorylated by treatment with dibenzyl phosphate under strictly anhydrous conditions to give after catalytic hydrogenolysis, a peracetyl trisaccharide phosphate. This was coupled with P1-dolichyl P2-diphenyl diphosphate to give, after O-deacetylation, P1-dolichyl P2-[O- beta-D-mannopyranosyl- (1-4)-O-(2-acetamido-2-deoxy-beta-D-glucopyranosyl)- (1-4)-2-acetamido-2-deoxy-alpha-D-glucopyranosyl] diphosphate, a trisaccharide "lipid intermediate". O-(2,3,4,6-Tetra-O-acetyl-alpha-D-mannopyranosyl)-(1-3)-O-(2,4,6-tri-O- acetyl-beta-D-mannopyranosyl)-(1-4)-O-(2-acetamido-3,6-di-O-acetyl-2- deoxy-beta- D-glucopyranosyl)- (1-4)-(2-acetamido-3,6-di-O-acetyl-2-deoxy-alpha-D-glucopyranosyl) phosphate, synthesized from O-alpha-D-mannopyranosyl-(1-3)-O-beta-D- mannopyranosyl-(1-4)-2-acetamido-2-deoxy-D-glucopyranose that had been isolated from mannosidosis urine was coupled with P1-dolichyl P2-diphenyl diphosphate to give, after O-deacetylation, P1-dolichyl P2-[O-alpha-D-mannopyranosyl- (1-3)-O-beta-D-mannopyranosyl-(1-4)-O-(2-acetamido-2-deoxy-beta-D- glucopyranosyl)-(1-4)-2-acetamido-2-deoxy-alpha-D-glucopyranosyl] diphosphate, a tetrasaccharide "lipid intermediate".
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21
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Abbas SA, Matta KL. Synthesis of methyl 3-O- and 2-O-(2-acetamido-2-deoxy-beta-D-glucopyranosyl)-alpha D-galactopyranoside. Carbohydr Res 1983; 123:53-61. [PMID: 6689405 DOI: 10.1016/0008-6215(83)88380-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Condensation of methyl 2-O-benzoyl-4,6-O-benzylidene-alpha-D-galactopyranoside with 3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-beta-D-glucopyranosyl bromide (1) in dichloromethane, in the presence of silver trifluoromethanesulfonate, 2,4,6-trimethylpyridine, and molecular sieves, afforded methyl 2-O-benzoyl-4,6-O-benzylidene-3-O-(3,4,6-tri-O-acetyl-2-deoxy-2-phthalim ido- beta-D-glucopyranosyl)-alpha-D-galactopyranoside (4). Deacetalation of 4 in hot, 80% aqueous acetic acid gave methyl 2-O-benzoyl-3-O-(3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido- beta-D-glucopyranosyl)-alpha-D-galactopyranoside (5), which, on deacylation, followed by peracetylation, furnished the peracetylated disaccharide derivative (6). The structures of 5 and 6 were established by 1H-n.m.r. spectroscopy. O-Deacetylation of 6 afforded the title beta-(1 leads to 3)-linked disaccharide 7. For the synthesis of the beta-(1 leads to 2)-linked isomer, methyl 3-O-benzoyl-4,6-O-benzylidene-alpha-D-galactopyranoside was similarly condensed with bromide 1 to give the fully protected disaccharide derivative (8). Cleavage of the benzylidene group of 8 gave methyl 3-O-benzoyl-2-O-(3,4,6- tri-O-acetyl-2-deoxy-2-phthalimido-beta-D-glucopyranosyl)-alpha-D- galactopyranoside (9). Deacetylation of 9, followed by peracetylation, afforded the peracetate (10). O-Deacetylation of 10 gave the beta-(1 leads to 2)-linked disaccharide (11). The structures of the disaccharides 7 and 11 were confirmed by 13C-n.m.r. spectroscopy.
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22
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Nashed MA, Anderson L. Oligosaccharides from "standardized intermediates". Synthesis of a branched tetrasaccharide glycoside isomeric with the blood-group B, type 2 determinant. Carbohydr Res 1983; 114:43-52. [PMID: 6189607 DOI: 10.1016/0008-6215(83)88171-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Building block derivatives of the component monosaccharides were used to construct the tetrasaccharide glycoside 15, in which an alpha-D-Galp-(1 leads to 4)-D-Gal linkage replaces the alpha-(1 leads to 3) linkage of the human blood-group B, type 2, determinant structure. The initial coupling of 2-O-benzoyl-3,6-di-O-benzyl-4-O-(tetrahydropyran-2-yl)-alpha-D-galactopyranosyl chloride to allyl 2-acetamido-3,6-di-O-benzyl-2-deoxy-beta-D-glucopyranoside was followed by selective deprotection of the disaccharide product, either at O-4' (to give 8) or O-2' (to give 3). The conversion of 8 into 15 involved successive coupling with tetra-O-benzyl-alpha-D-galactopyranosyl bromide (8 leads to 11), O-debenzoylation at O-2' (11 leads to 12), coupling with tri-O-benzyl-alpha-L-fucopyranosyl bromide (12 leads to 14), and O-debenzylation by hydrogenolysis (14 leads to 15). Alternatively, 3 was alpha-L-fucosylated to give 6, and 6 was selectively deprotected at O-4' to give 7. However, attempts to alpha-D-galactosylate 7 were unsuccessful. The unsubstituted forms of the intermediate disaccharide (8) and trisaccharide (12) glycosides were obtained by appropriate deblocking procedures.
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23
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Koto S, Yoshida T, Takenaka K, Zen S. A Through-process for the Preparation of Methyl Per-O-acetyl 1-Thio-glycosides from Aldoses. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1982. [DOI: 10.1246/bcsj.55.3667] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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24
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Kiso M, Kaneda Y, Shimizu R, Hasegawa A, Azuma I. Synthesis and immunoadjuvant activities of the repeating, disaccharide-dipeptide unit of the bacterial, cell-wall peptidoglycan and of some carbohydrate analogs. Carbohydr Res 1982; 104:253-69. [PMID: 7105067 DOI: 10.1016/s0008-6215(00)82587-2] [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: 01/23/2023]
Abstract
The repeating disaccharide-dipeptide units of the bacterial, cell-wall peptidoglycan, one being O-(N-acetyl-beta-muramoyl-L-alanyl-D-isoglutamine)-(1 leads to 4)-2-acetamido-2-deoxy-D-glucose, and the other, O-(2-acetamido-2-deoxy-beta-D-glucosyl)-(1 leads to 4)-N-acetyl-muramoyl-L-alanyl-D-isoglutamine, have been synthesized. Some carbohydrate analogs, such as O-(N-acetyl-beta-muramoyl-L-alanyl-D-isoglutamine)-(1 leads to 4)-N-acetylmuramoyl-L-alanyl-D-isoglutamine, O-beta-D-glucosyl-(1 leads to 4)-N-acetylmuramoyl-L-alanyl-D-isoglutamine, and O-(6-acetamido-6-deoxy-beta-D-glucosyl)-(1 leads to 4)-N-acetylmuramoyl-L-alanyl-D-isoglutamine, were also synthesized. Their immunoadjuvant activities were examined in guinea-pigs.
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25
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New synthesis of a benzylated chitobiose derivative, employing 4-O-acetyl-3,6-di-O-benzyl-2-deoxy-2-phthalimido-α-d-glucopyranosyl chloride. Carbohydr Res 1982. [DOI: 10.1016/s0008-6215(00)81066-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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26
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27
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Slife CW, Nashed MA, Anderson L. “Standardized intermediates” for oligosaccharide synthesis. Precursors of β-linked, interior d-galactopyranose units having chain extension at position 4, or positions 4 and 2. Carbohydr Res 1981. [DOI: 10.1016/s0008-6215(00)80851-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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A convergent and flexible approach to the synthesis of enterobacterial lipid A. Fully substituted disaccharides having palmitoyl as the fatty acyl moiety. Carbohydr Res 1981. [DOI: 10.1016/s0008-6215(00)80408-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Kiso M, Nishiguchi H, Nishihori K, Hasegawa A, Miura I. Synthesis of β-d-(1→6)-linked disaccharides of N-fatty acylated 2-amino-2-deoxy-d-glucose: an approach to the lipid a component of the bacterial lipopolysaccharide. Carbohydr Res 1981. [DOI: 10.1016/s0008-6215(00)84617-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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