Regio and stereoselective construction of Fucα(1-6) GlcNTroc disaccharide for the synthesis of fucose-containing N-glycans

Journal of Beijing University of Chemical Technology ›› 2013, Vol. 40 ›› Issue (3) : 44-49.

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Journal of Beijing University of Chemical Technology ›› 2013, Vol. 40 ›› Issue (3) : 44-49.
化学与化学工程

Regio and stereoselective construction of Fucα(1-6) GlcNTroc disaccharide for the synthesis of fucose-containing N-glycans

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Abstract

It is becoming increasingly clear that the presence of a fucose moiety attached to the acetylglucosamine unit (GlcNAc) of N-glycans is important the in vivo activity of erythropoietin. However, the synthesis of N-glycans, especially fucose-containing hybrid type N-glycans, is very difficult due to the risk of breaking the α-glycosidic bond in the Fucα(1-6)GlcNAc unit during the tedious process of protection-deprotection. In this paper, the key point is that a benzyl group was used as a sterically demanding protecting group, which led to the regio-and stereoselective construction of Fucα(1-6)GlcNTroc disaccharide due to the “steric hindrance effect” and “armed activation” of the benzyl group when glycosylating allyl 3-benzyl-2-deoxy-2- (2,2,2trichloroethoxycarbonylamino)-α-D-glucopyranoside (compound 3) with methyl 2-O-Benzyl-3,4-di-O-acetyl-1-thio-β-L-fucopyranoside (compound 2) in dichloromethane and cyclopentyl methyl ether (CPME) in the presence of the methyl triflate (MeOTf) and 2,6-di-tert-butyl-4-methylpyridine (DTBMP). The selective formation of Fucα(1-6)GlcNAc disaccharide unit (compound 1) simplifies the synthetic route. The compound 1 was characterized by 1H nuclear magnetic resonance spectroscopy and mass spectrometry. This work provides the basis for further study of the solid-phase synthesis of fucosecontaining N-glycans.

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Regio and stereoselective construction of Fucα(1-6) GlcNTroc disaccharide for the synthesis of fucose-containing N-glycans[J]. Journal of Beijing University of Chemical Technology, 2013, 40(3): 44-49

References

[1]Scanlan C N, Offer J, Zitzmann N, et al. Exploiting the defensive sugars of HIV-1 for drug and vaccine design[J]. Nature, 2007, 446(7139): 1038-1045. 
[2]Takeda Y, Totani K, Matsuo I, et al. Chemical approaches toward understanding glycanmediated protein quality control[J]. Current Opinion in Chemical Biology, 2009, 13(5/6): 582-591. 
[3]Helenius A, Aebi M. Intracellular functions of Nlinked glycans[J]. Science, 2001, 291(5512): 2364-2369. 
[4]Hedlund M, Ng E, Varki A, et al. α2-6-Linked sialic acids on N-Glycans modulate carcinoma differentiation -in vivo[J]. Cancer Research, 2008, 68(2): 388-394. 
[5]Zhao Y, Sato Y, Isaji T, et al. Branched Nglycans regulate the biological functions of integrins and cadherins[J]. The FEBS Journal, 2008, 275(9): 1939-1948. 
[6]Yoon S J, Ikeda S, Sadilek M, et al. Selfrecognition of Nlinked glycans with multivalent GlcNAc, determined as ceramide mimetic conjugate[J]. Glycobiology, 2007, 17(9): 1007-1014. 
[7]Huang H H, Stanley P. A testisspecific regulator of complex and hybrid N-glycan synthesis[J]. The Journal of Cell Biology, 2010, 190(5): 893-910. 
[8]Wyatt R, Sodroski J. The HIV1 envelope glycoproteins: Fusogens, Antigens, and Immunogens[J]. Science, 1998, 280(5371): 1884-1888. 
[9]Geyer H, Geyer R. Glycobiology of viruses[M]∥Ernst B, Hart G W, Sina P. Carbohydrates in Chemistry and Biology: Vol 4 Lectins and Saccharide Biology. Neustadt: WileyVCH, 2000: 821.

[10]Troy F A. Polysialylation: from bacteria to brains[J]. Glycobiology, 1992, 2(1): 5-23. 
[11]Guo Z, Shao N. Glycopeptide and glycoprotein synthesis involving unprotected carbohydrate building blocks[J]. Medicinal Research Reviews, 2005, 25(6): 655-678. 
[12]Takano R, Muchmore E, Dennis J W. Sialylation and malignant potential in tumour cell glycosylation mutants[J]. Glycobiology, 1994, 4(5): 665-674. 
[13]Bao G M, Tanaka K, Ikenaka K, et al. Probe design and synthesis of Galβ(1→3)[NeuAcα(2→6)]GlcNAcβ(1→2)Man motif of N-glycan[J]. Bioorganic & Medicinal Chemistry, 2010, 18(11): 3760-3766. 
[14]Kudo T, Nakagawa H, Takahashi M, et al. Nglycan alterations are associated with drug resistance in human hepatocellular carcinoma[J]. Molecular Cancer, 2007, 6: 32. 
[15]Sun B, Srivinasan B, Huang X. PreActivationBased Onepot Synthesis of an α-(2,3)-Sialylated CoreFucosylated Complex Type BiAntennary NGlycan Dodecasaccharid[J]. ChemistryA European Journal, 2008, 14(23): 7072-7081. 
[16]Dan A, Lergenmuller M, Amano M, et al. p-Methoxybenzylidenetethered β-Mannosylation for Stereoselective Synthesis of AsparagineLinked Glycan Chains[J]. ChemistryA European Journal, 1998, 4(11): 2182-2190. 
[17]Wang P, Zhu J, Yuan Y, et al. Total Synthesis of the 2, 6-Sialylated Immunoglobulin G Glycopeptide Fragment in Homogeneous Form[J]. Journal of the American Chemical Society, 2009, 131(46): 16669-16671. 
[18]Wu B, Hua Z, Warren J D, et al. Synthesis of the fucosylated biantennary N-glycan of erythropoietin[J]. Tetrahedron Letters, 2006, 47(31): 5577-5579. 
[19]Premathilake H D, Demchenko A V. Superarmed and superdisarmed building blocks in expeditious oligo saccharide synthesis[J]. Topics in Current Chemistry, 2011, 301: 189-221. 
[20]Seifert J, Lergenmüller M, Ito Y. Synthesis of an α-(2, 3)-Sialylated, ComplexType Undecasaccharide[J]. Angewandte Chemie International Edition, 2000, 39(3): 531-534.
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