1
|
Lee YT, Jung C, Myeong IS, Lee SH, Kim JS, Ham WH. Stereoselective allylation of α-hydroxy aldimines and its application to the formal synthesis of (−)-β-conhydrine. Tetrahedron 2018. [DOI: 10.1016/j.tet.2017.12.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
2
|
Semisynthetic glycoconjugate vaccine candidate against Streptococcus pneumoniae serotype 5. Proc Natl Acad Sci U S A 2017; 114:11063-11068. [PMID: 28973947 DOI: 10.1073/pnas.1706875114] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Glycoconjugate vaccines based on isolated capsular polysaccharide (CPS) save millions of lives annually by preventing invasive pneumococcal disease caused by Streptococcus pneumoniae Some components of the S. pneumoniae glycoconjugate vaccine Prevnar13 that contains CPS antigens from 13 serotypes undergo modifications or degradation during isolation and conjugation, resulting in production problems and lower efficacy. We illustrate how stable, synthetic oligosaccharide analogs of labile CPS induce a specific protective immune response against native CPS using S. pneumoniae serotype 5 (ST-5), a problematic CPS component of Prevnar13. The rare aminosugar l-PneuNAc and a branched l-FucNAc present in the natural repeating unit (RU) are essential for antibody recognition and avidity. The epitope responsible for specificity differs from the part of the antigen that is stabilized by chemical modification. Glycoconjugates containing stable, monovalent synthetic oligosaccharide analogs of ST-5 CPS RU induced long-term memory and protective immune responses in rabbits superior to those elicited by the ST-5 CPS component in multivalent Prevnar13.
Collapse
|
3
|
Myeong IS, Lee YT, Lee SH, Jung C, Kim JS, Park SH, Kang J, Lee SJ, Ye IH, Ham WH. Stereoselective allylation reactions of acyclic and chiral α-amino-β-hydroxy aldehydes. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.tetasy.2017.07.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
4
|
Cyman M, Wielińska J, Myszka H, Trzybiński D, Sikorski A, Nowacki A, Liberek B. Influence of the oxime and anomeric configurations on the stability of 2-deoxy-2-hydroxyimino- d -hexopyranosides. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.07.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
5
|
Skarbek K, Milewska MJ. Biosynthetic and synthetic access to amino sugars. Carbohydr Res 2016; 434:44-71. [PMID: 27592039 DOI: 10.1016/j.carres.2016.08.005] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/11/2016] [Accepted: 08/20/2016] [Indexed: 12/01/2022]
Abstract
Amino sugars are important constituents of a number of biomacromolecules and products of microbial secondary metabolism, including antibiotics. For most of them, the amino group is located at the positions C1, C2 or C3 of the hexose or pentose ring. In biological systems, amino sugars are formed due to the catalytic activity of specific aminotransferases or amidotransferases by introducing an amino functionality derived from L-glutamate or L-glutamine to the keto forms of sugar phosphates or sugar nucleotides. The synthetic introduction of amino functionalities in a regio- and stereoselective manner onto sugar scaffolds represents a substantial challenge. Most of the modern methods of for the preparation of 1-, 2- and 3-amino sugars are those starting from "an active ester" of carbohydrate derivatives, glycals, alcohols, carbonyl compounds and amino acids. A substantial progress in the development of region- and stereoselective methods of amino sugar synthesis has been made in the recent years, due to the application of metal-based catalysts and tethered approaches. A comprehensive review on the current state of knowledge on biosynthesis and chemical synthesis of amino sugars is presented.
Collapse
Affiliation(s)
- Kornelia Skarbek
- Department of Organic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, 11/12 Narutowicza Str., 80-233 Gdańsk, Poland
| | - Maria J Milewska
- Department of Organic Chemistry, Faculty of Chemistry, Gdańsk University of Technology, 11/12 Narutowicza Str., 80-233 Gdańsk, Poland.
| |
Collapse
|
6
|
Abstract
The glycosylation of proteins, specifically installation of O-GlcNAc on Ser/Thr residues, is a dynamic control element for transcription repression, protein degradation, and nutrient sensing. To provide homogeneous and stable structures with this motif, the synthesis of a C-linked mimic, C-GlcNAc Ser, has been prepared from the C-Glc Ser by a double inversion strategy using azide to insert the C-2 nitrogen functionality. The C-Glc Ser was available by a ring-closing metathesis and hydroalkoxylation route.
Collapse
Affiliation(s)
- Ernest G Nolen
- Department of Chemistry, Colgate University, Hamilton, New York 13346, USA.
| | | | | |
Collapse
|
7
|
Lichtenthaler FW. 2-Oxoglycosyl ("ulosyl") and 2-oximinoglycosyl bromides: versatile donors for the expedient assembly of oligosaccharides with β-D-mannose, β-L-rhamnose, N-acetyl-β-D-mannosamine, and N-acetyl-β-D-mannosaminuronic acid units. Chem Rev 2011; 111:5569-609. [PMID: 21751781 DOI: 10.1021/cr100444b] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Frieder W Lichtenthaler
- Clemens-Schöpf-Institut für Organische Chemie, Technische Universität Darmstadt, D-64287 Darmstadt, Germany.
| |
Collapse
|
8
|
Epoxidation of glycals with oxone–acetone–tetrabutylammonium hydrogen sulfate: a convenient access to simple β-d-glycosides and to α-d-mannosamine and d-talosamine donors. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.06.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
9
|
Lergenmüller M, Kläres U, Lichtenthaler FW. E versus Z geometry in β-d-arabino-hexopyranosidulose oximes. Carbohydr Res 2009; 344:2127-36. [DOI: 10.1016/j.carres.2009.08.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2009] [Revised: 07/31/2009] [Accepted: 08/01/2009] [Indexed: 11/26/2022]
|
10
|
Donohoe TJ, Blades K, Moore PR, Waring MJ, Winter JJG, Helliwell M, Newcombe NJ, Stemp G. Directed dihydroxylation of cyclic allylic alcohols and trichloroacetamides using OsO4/TMEDA. J Org Chem 2002; 67:7946-56. [PMID: 12423122 DOI: 10.1021/jo026161y] [Citation(s) in RCA: 118] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The oxidation of a range of cyclic allylic alcohols and amides with OsO4/TMEDA is presented. Under these conditions, hydrogen bonding control leads to the (contrasteric) formation of the syn isomer in almost every example that was examined. Evidence for the bidentate binding of TMEDA to OsO4 is presented and a plausible mechanism described.
Collapse
|
11
|
Drew MG, Ennis SC, Gridley JJ, Osborn HM, Spackman DG. Synthesis of disaccharides containing α-linked GlcNAc or β-linked ManNAc units. Tetrahedron 2001. [DOI: 10.1016/s0040-4020(01)00760-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
12
|
Młynarski J, Banaszek A. Synthetic routes to methyl 3-deoxy-aldulosonic acid methyl esters and their 2-deoxy isomers based on the Horner-Emmons and Peterson reaction of sugar lactones. Tetrahedron 1999. [DOI: 10.1016/s0040-4020(99)00049-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
13
|
Karpiesiuk W, Banaszek A. Stereoselective syntheses of the O,N-protected subunits of the tunicamycins. Carbohydr Res 1997; 299:245-52. [PMID: 9175272 DOI: 10.1016/s0008-6215(97)00018-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The synthesis of the title compounds is described, i.e. coupling of the ylide, generated from the iodophosphonium salt of protected N-phthaloyl-D-galactosamine with 2,3-O-isopropylidene D-ribo-aldehyde afforded an undecose in high yield. Hydroboration-oxidation reaction of the olefinic linkage in the undecose led to the desired tunicamine, as the predominant product. After conversion of the latter to a glycosyl acceptor, this was assembled with the fully protected 2-oxyimino-2-deoxy-alpha-D-arabino-hexopyranosyl bromide, leading to a trehalose-type alpha, beta-disaccharide.
Collapse
Affiliation(s)
- W Karpiesiuk
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw, Poland
| | | |
Collapse
|
14
|
Synthesis of 2″-acylamido derivatives of 2″-amino-5,2″-dideoxy-5-epi-5-fluorodibekacin and a study on the structures of 5-fluorinated dibekacin analogs by 13C NMR. Carbohydr Res 1997. [DOI: 10.1016/s0008-6215(97)00031-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
15
|
Smiatacz Z, Chrzczanowicz I, Myszka H. Chemical modification of some methyl (3,4-di-O-acetyl-2-deoxy-2-hydroxyimino-α-d-arabino-hexopyranosid)uronates. Carbohydr Res 1997. [DOI: 10.1016/s0008-6215(96)00319-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
16
|
Barili PL, Berti G, Catelani G, D'Andrea F, Di Bussolo V. The conversion of d-galactopyranosides into 2-amino-2-deoxy-d-talopyranosyl derivatives: Some new data. Carbohydr Res 1996. [DOI: 10.1016/0008-6215(96)00121-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
17
|
Karpiesiuk W, Banaszek A. Highly stereoselective synthesis of alpha,beta-linked, nonreducing disaccharides related to tunicamycin. Carbohydr Res 1994; 261:243-53. [PMID: 7954514 DOI: 10.1016/0008-6215(94)84021-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
3,4,6-Tri-O-benzoyl-2-(benzoyloxyimino)-2-deoxy-alpha-D-arabino-++ +hexopyranosy l bromide (2) reacts with the O-protected 2-deoxy-2-phthalimido-beta-D-galactosamines 3 and 4 in the presence of silver triflate and sym-collidine at -78 degrees C, to give alpha,beta-(1-->1)-linked disaccharides 6a and 7a with an excellent selectivity. The 2-oxyimino function was stereospecifically converted into a 2-acetamido group by use of the LiBH4-Me3SiCl-THF reductive species, furnishing, after acetylation, the alpha-D-GlcNAc-(1-->1)-beta-D-GalNPhth nonsymmetrical, trehalose type disaccharides 13 and 14 related to tunicamycin (1, part A). Similarly, alpha-D-GlcNAc-(1-->1)-beta-D-GlcNPhth (15) was prepared, starting from 2 and 5. The factors governing the stereoselectivity of the glycosylation reactions were determined.
Collapse
Affiliation(s)
- W Karpiesiuk
- Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw
| | | |
Collapse
|