<i>O</i>-Glycosylation Enabled by <i>N-</i>(Glycosyloxy)acetamides
作者:Miao Liu、Bo-Han Li、De-Cai Xiong、Xin-Shan Ye
DOI:10.1021/acs.joc.8b01003
日期:2018.8.3
A novelglycosylation protocol has been established by using N-(glycosyloxy)acetamides as glycosyldonors. The N-oxyacetamide leaving group in donors could be rapidly activated in the presence of Cu(OTf)2 or SnCl4 under microwave irradiation. This glycosylation process afforded the coupled products in high yields, and the reaction enjoyed a broad substrate scope, even for disarmed donors and hindered
O-Glycosylhydroxylamines: A new class of monosaccharide
作者:Eugenia M. Nashed、Edward Grochowski、Ewa Czyzewska
DOI:10.1016/0008-6215(90)84118-e
日期:1990.2
Synthese d'acide N-acetylO-[tetra-O-benzyl-2,3,4,6 hexopyranosyl] acetohydroxamique a partir d'O-phtalimido-1 tri-O-benzyl-2,3,5 ribofuranose, d'hydrazine et d'anhydride d'acide acetique
Grochowski, Edward; Nashed, Eugenia M.; Jurczak, Janusz, Bulletin of the Polish Academy of Sciences: Chemistry, 1987, vol. 35, # 7-8, p. 255 - 260
作者:Grochowski, Edward、Nashed, Eugenia M.、Jurczak, Janusz
DOI:——
日期:——
Expedient synthesis of aminooxylated-carbohydrates for chemoselective access of glycoconjugates
作者:Olivier Renaudet、Pascal Dumy
DOI:10.1016/s0040-4039(01)01614-8
日期:2001.10
Herein, we describe an efficient preparation of various biologically important carbohydrate motifs bearing an aminooxy group at the anomeric position. These nucleophilic sugar analogues represent useful intermediates for the chemoselective preparation of glycoconjugates. The key glycosylation step involves the coupling of fluoro-activated protected sugar and N-hydroxyphthalimide in the presence of BF3. Et2O. Final deprotection and cleavage of the phthalimide moiety with methylhydrazine afforded new Glc-beta -ONH2 3, GalNAc-beta -ONH2 9, Glc-alpha -ONH2 14, Gal-alpha -ONH2 17 and Man-alpha -ONH2 20 derivatives with good yields. Compared to the literature results, the preparation of Gal-beta -ONH2 6, GalNAc-alpha -ONH2 11 and Lac-beta -ONH2 23 proved to be more efficient. (C) 2001 Elsevier Science Ltd. All rights reserved.
NASHED, EUGENIA M.;GROCHOWSKI, EDWARD;CZYZEWSKA, EWA, CARBOHYDR. RES., 196,(1990) C. 184-190