N-(beta-Glycopyranosyl)azidoacetamides, mimetics of the widely distributed GlcNAc-Asn linkage in glycoproteins, have been synthesized in good yields starting from beta-glycopyranosylamines in four steps involving selective N-chloroacetylation, peracetylation catalyzed by Na beta-zeolite, displacement of the Cl group by NaN3 in aqueous acetone, and Zemplen de-O-acetylation.
Synthesis ofN-chioroacetyl-?-glycopyranosylamines, derivatives of monosaccharides and lactose
摘要:
N-Chloroacetyl-beta-glycosylamines were synthesized from various monosaccharides (hexoses, pentoses, deoxysugars, uronic acids, and sugar phosphates) and a disaccharide (lactose) by N-acylation of the corresponding beta-glycosylamines with chloroacetic anhydride in DMF. In some cases, treatment of monosaccharides with NH3 in the presence of (NH4)CO3 in MeOH or aqueous MeOH was more efficient than the methods previously described, as it gave beta-glycosylamines in higher yields.
Glycoconjugates of amino acids. Preparation throughN-alkylation of amino acids withN-chloroacetyl-β-glycopyranosylamines
作者:L. M. Likhosherstov、O. S. Novikova、V. N. Shibaev
DOI:10.1007/bf02495306
日期:1999.7
Monoalkylation of amino acids of different structural types withN-chloroacetyl-glycosylamines was shown to be applicable for the preparation of glycoconjugates containing β-d-galactose,N-acetyl-β-d-glucosamine, β-d-mannose, and lactose residues. The glycoconjugates were synthesized from amino acids with secondary (sarcosine,l-proline) or primary (l-2- and 4-aminobutyric acids,l-tryptophan) amino groups
N-glycyl-β-glycopyranosylamines, derivatives of mono- and disaccharides, and their use for the preparation of carboxylic acid glycoconjugates
作者:L. M. Likhosherstov、O. S. Novikova、A. O. Zheltova、V. N. Shibaev
DOI:10.1007/bf02495096
日期:2000.8
ofN-glycyl-β-glycopyranosylamines, derivatives of monosaccharides (d-galactose,d-mannose,l-fucose, andN-acetyl-d-glucosamine) and disaccharides (lactose, melibiose, cellobiose, and maltose). These compounds were demonstrated to be useful for the preparation of glycoconjugates of biologically active compounds containing the carboxy group (nicotinic, orotic, kynurenic, and indoleacetic acids). Synthetic pathways
Glycoconjugates of amines: alkylation of primary and secondary amines withN-chloroacetyl-β-glycopyranosylamines
作者:L. M. Likhosherstov、O. S. Novikova、V. N. Shibaev
DOI:10.1007/bf02503499
日期:1998.6
Efficient monoalkylation of a series of primary and secondary amines was demonstrated with the use ofN-chloroacetylglycosylamines derived fromd-glucose,d-galactose,d-mannose,N-acetyl-d-glucosamine, and lactose. The reaction was shown to be useful for incorporation of carbohydrate residues into physiologically active compounds. Glycoconjugates of some derivatives of piperazine, 2-phenylethylamine, tryptamine
Synthesis ofN-chioroacetyl-?-glycopyranosylamines, derivatives of monosaccharides and lactose
作者:L. M. Likhosherstov、O. S. Novikova、V. N. Shibaev、N. K. Kochetkov
DOI:10.1007/bf01431821
日期:1996.7
N-Chloroacetyl-beta-glycosylamines were synthesized from various monosaccharides (hexoses, pentoses, deoxysugars, uronic acids, and sugar phosphates) and a disaccharide (lactose) by N-acylation of the corresponding beta-glycosylamines with chloroacetic anhydride in DMF. In some cases, treatment of monosaccharides with NH3 in the presence of (NH4)CO3 in MeOH or aqueous MeOH was more efficient than the methods previously described, as it gave beta-glycosylamines in higher yields.
N-(beta-Glycopyranosyl)azidoacetamides, mimetics of the widely distributed GlcNAc-Asn linkage in glycoproteins, have been synthesized in good yields starting from beta-glycopyranosylamines in four steps involving selective N-chloroacetylation, peracetylation catalyzed by Na beta-zeolite, displacement of the Cl group by NaN3 in aqueous acetone, and Zemplen de-O-acetylation.