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Carbohydr Res ; 399: 38-48, 2014 Nov 18.
Artigo em Inglês | MEDLINE | ID: mdl-25081322

RESUMO

New derivatives of d-xylose with aglycons of the most efficient glucose derived inhibitors of glycogen phosphorylase were synthesized to explore the specificity of the enzyme towards the structure of the sugar part of the molecules. Thus, 2-(ß-d-xylopyranosyl)benzimidazole and 3-substituted-5-(ß-d-xylopyranosyl)-1,2,4-triazoles were obtained in multistep procedures from O-perbenzoylated ß-d-xylopyranosyl cyanide. Cycloadditions of nitrile-oxides and O-peracetylated exo-xylal obtained from the corresponding ß-d-xylopyranosyl cyanide furnished xylopyranosylidene-spiro-isoxazoline derivatives. Oxidative ring closure of O-peracetylated ß-d-xylopyranosyl-thiohydroximates prepared from 1-thio-ß-d-xylopyranose and nitrile-oxides gave xylopyranosylidene-spiro-oxathiazoles. The fully deprotected test compounds were assayed against rabbit muscle glycogen phosphorylase b to show moderate inhibition for 3-(2-naphthyl)-5-(ß-d-xylopyranosyl)-1,2,4-triazole (IC50=0.9mM) only.


Assuntos
Inibidores Enzimáticos/farmacologia , Glicogênio Fosforilase Muscular/antagonistas & inibidores , Compostos Heterocíclicos/síntese química , Compostos Heterocíclicos/farmacologia , Músculo Esquelético/enzimologia , Compostos de Espiro/farmacologia , Xilose/análogos & derivados , Animais , Inibidores Enzimáticos/síntese química , Inibidores Enzimáticos/química , Glicogênio Fosforilase Muscular/metabolismo , Compostos Heterocíclicos/química , Estrutura Molecular , Coelhos , Compostos de Espiro/síntese química , Compostos de Espiro/química , Relação Estrutura-Atividade , Xilose/química , Xilose/farmacologia
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