1,2,3-Triazoles and related glycoconjugates as new glycosidase inhibitors
摘要:
A series of saccharidyl-triazoles structurally related to acarbose were prepared and tested as inhibitors of glycosidases. They share in common a 1,4,5trisubstituted 1,2,3-triazole heterocycle as a functional element able to interact with the active site of the target enzymes. First, it was established that the heterocyclic core exhibits a moderate but highly selective a-glucosidase inhibitory activity. Then, it was confirmed that the inhibitory properties could be modulated by conjugation from one to five carbohydrate residues. The present study includes the regio- and stereocontrolled synthesis of novel non-fused 1,2,3-triazolo-pseudooligosaccharides as well as their evaluation as new glycosidase inhibitors. (c) 2005 Elsevier Ltd. All rights reserved.
1,2,3-Triazoles and related glycoconjugates as new glycosidase inhibitors
作者:Régis Périon、Vincent Ferrières、M. Isabel García-Moreno、Carmen Ortiz Mellet、Raphaël Duval、José M. García Fernández、Daniel Plusquellec
DOI:10.1016/j.tet.2005.07.033
日期:2005.9
A series of saccharidyl-triazoles structurally related to acarbose were prepared and tested as inhibitors of glycosidases. They share in common a 1,4,5trisubstituted 1,2,3-triazole heterocycle as a functional element able to interact with the active site of the target enzymes. First, it was established that the heterocyclic core exhibits a moderate but highly selective a-glucosidase inhibitory activity. Then, it was confirmed that the inhibitory properties could be modulated by conjugation from one to five carbohydrate residues. The present study includes the regio- and stereocontrolled synthesis of novel non-fused 1,2,3-triazolo-pseudooligosaccharides as well as their evaluation as new glycosidase inhibitors. (c) 2005 Elsevier Ltd. All rights reserved.
A new synthesis of the oligosaccharide domain of acarbose
Synthesis of the oligosaccharide domain of acarbose was reinvestigated and was optimally performed using a maltosidic acceptor, already bearing a alpha-D-Glc-(1-->4)-D-Glc bond, and a new D-fucopyranosyl donor. The crucial glycosylation step was improved by varying three different parameters and notably by focusing on the C-4 protecting group of the fucosyl residue, solvent and promoter. The resulting