Synthesis of heterocyclic N-(β-d-glucopyranosyl)carboxamides for inhibition of glycogen phosphorylase
作者:Bálint Kónya、Tibor Docsa、Pál Gergely、László Somsák
DOI:10.1016/j.carres.2012.01.020
日期:2012.4
In a DCC-mediated coupling 2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosylamine and propiolic acid gave N-propynoyl-2,3,4,6-tetra-O-acetyl-beta-D-glucopyranosylamine which was transformed by 1,3-dipolar cycloadditions with aromatic azides and nitrile-oxides to the corresponding O-peracetylated N-(beta-D-glucopyranosyl)-1-substituted-1,2,3-triazole-4-carboxamides and N-(beta-D-glucopyranosyl)-3-substitutedisoxazole-5-carboxamides, respectively. These compounds were O-deacetylated by Zemplen's protocol to be tested as inhibitors of rabbit muscle glycogen phosphorylase b. The best inhibitors of the two series were N-(beta-D-glucopyranosyl)-1-(3,5-dimethyl-phenyl)-1,2,3-triazole-4-carboxamide (K-i = 34 mu M) and N-(beta-D-glucopyranosyl)-3-(indol-2-yl)-isoxazole-5-carboxamide (K-i = 164 mu M). (C) 2012 Elsevier Ltd. All rights reserved.