Development of a synthetic method for the preparation of homogeneous glycopeptides and glycoproteins is important for the elucidation of their structures and functions. Here, we report on the concise and facile synthesis of glycopeptides using Boc groups for the protection of carbohydrate hydroxyl groups. This method enables us to remove the protecting groups from peptide and carbohydrate moieties
A short synthetic entry into the disaccharidic hapten beta-D-Galf-(1-->3)-alpha-D-Manp-O(CH2)(8)CO2Me containing a galactofuranosyl entity at the non-reducing part is described. The synthetic scheme was designed in such a way that each required building block could be obtained by minimizing the number of chemical and purification steps. Indeed, compound 8 was obtained according to a four step-one pot preparation.
Efficient Syntheses of β-Cyanosugars Using Glycosyl Iodides Derived from Per-<i>O</i>-silylated Mono- and Disaccharides
作者:Abhijit S. Bhat、Jacquelyn Gervay-Hague
DOI:10.1021/ol0160405
日期:2001.6.1
[GRAPHICS]Reported herein is a general method for the efficient syntheses of a variety of beta -cyano glycosides through the activation of per-O-trimethylsllyl glycosides with TMSI to form alpha -glycosyl iodides, which undergo S(N)2-type displacement when treated with tetrabutylammonium cyanide. The cyanoglycosides were reduced under mild conditions using NaBH4 in the presence of catalytic CoCl2(H2O)(6) in THF/H2O to give the corresponding aminomethyl glycosides.