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Protecting group migrations in carbohydrate chemistry. Carbohydr Res 2020; 497:108151. [PMID: 32977215 DOI: 10.1016/j.carres.2020.108151] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 09/06/2020] [Accepted: 09/08/2020] [Indexed: 11/22/2022]
Abstract
Protecting groups are valuable in chemo- and regioselective synthetic manipulations. In particular, they are indispensable in carbohydrate chemistry. Although a wide array of protecting groups are available at the disposal of carbohydrate chemists, their stability and orthogonality make the choice of protecting groups challenging. Another important factor is the migratory aptitude of different protecting groups used in carbohydrate chemistry. Migration of commonly used groups like silyl, acetal and acyl groups under various reaction conditions are discussed. Synthetic application of predicted migrations, alternate protecting groups to avoid migration and conditions favoring and disfavoring migrations are discussed in this review.
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Ferenczi RK, Illyés TZ, Király SB, Hoffka G, Szilágyi L, Mándi A, Antus S, Kurtán T. Evaluation of Different Synthetic Routes to (2R,3R)-3-Hydroxymethyl-2-(4-hydroxy- 3-methoxyphenyl)-1,4-Benzodioxane-6-Carbaldehyde. CURR ORG CHEM 2020. [DOI: 10.2174/1385272823666191212113407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The reported enantioselective synthesis for the preparation of (+)-(2R,3R)-2-(4-
hydroxy-3-methoxyphenyl)-3-hydroxymethyl-1,4-benzodioxane-6-carbaldehyde, precursor
for the stereoselective synthesis of bioactive flavanolignans, could not be reproduced.
Thus, the target molecule was prepared via the synthesis and separation of diastereomeric
O-glucosides. TDDFT-ECD calculations and the 1,4-benzodioxane helicity rule were utilized
to determine the absolute configuration. ECD calculations also confirmed that the 1Lb
Cotton effect is governed by the helicity of the heteroring, while the higher-energy ECD
transitions reflect mainly the orientation of the equatorial C-2 aryl group.
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Affiliation(s)
- Renáta Kertiné Ferenczi
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
| | - Tünde-Zita Illyés
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
| | - Sándor Balázs Király
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
| | - Gyula Hoffka
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
| | - László Szilágyi
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
| | - Attila Mándi
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
| | - Sándor Antus
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
| | - Tibor Kurtán
- Department of Organic Chemistry, University of Debrecen, P.O. Box 400, H-4002 Debrecen, Hungary
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Schuster HJ, Vijayakrishnan B, Davis BG. Chain-growth polyglycosylation: synthesis of linker-equipped mannosyl oligomers. Carbohydr Res 2015; 403:135-41. [DOI: 10.1016/j.carres.2014.06.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2014] [Revised: 06/16/2014] [Accepted: 06/19/2014] [Indexed: 11/29/2022]
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Pertel SS, Kononov LO, Zinin AI, Chirva VJ, Kakayan ES. Synthesis of some 2-alkoxy glyco-[2,1-d]-2-oxazolines and evaluation of their glycosylation reactivity. Carbohydr Res 2012; 356:172-9. [DOI: 10.1016/j.carres.2012.03.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Revised: 03/21/2012] [Accepted: 03/23/2012] [Indexed: 10/28/2022]
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Daragics K, Fügedi P. Synthesis of glycosaminoglycan oligosaccharides. Part 5: Synthesis of a putative heparan sulfate tetrasaccharide antigen involved in prion diseases. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.08.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Madaj J, Jankowska M, Wiśniewski A. Synthesis of cis-(1→3)-glycosides of allyl 2-acetamido-4,6-O-benzylidene-2-deoxy-α-d-glucopyranoside. Carbohydr Res 2004; 339:1293-300. [PMID: 15113666 DOI: 10.1016/j.carres.2004.01.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2003] [Accepted: 01/25/2004] [Indexed: 11/20/2022]
Abstract
Syntheses of allyl 2,3,4-tri-O-benzyl-alpha-D-gluco- and D-galactopyranosyluronate-(1-->3)-2-acetamido-4,6-O-benzylidene-2-deoxy-alpha-D-glucopyranoside via oxidation of the hydroxymethyl group of allyl 2,3,4-tri-O-benzyl-alpha-D-gluco- and D-galactopyranosyl-(1-->3)-2-acetamido-4,6-O-benzylidene-2-deoxy-alpha-D-glucopyranoside under Jones conditions are described. Structures of the title compounds were confirmed by (1)H and (13)C NMR spectroscopy.
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Affiliation(s)
- Janusz Madaj
- Department of Chemistry, Sugar Chemistry Group, University of Gdańsk, ul. Sobieskiego 18, PL-80-952 Gdańsk, Poland.
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