C-(2-Deoxy-d-arabino-hex-1-enopyranosyl)-oxadiazoles: synthesis of possible isomers and their evaluation as glycogen phosphorylase inhibitors
摘要:
Synthetic methods were elaborated for D-glucals attached to oxadiazoles by a C-C bond. Introduction of the double bond was effected by either DBU induced elimination of PhCOOH from the O-perbenzoylated glucopyranosyl precursors or Zn/N-methylimidazole mediated reductive elimination from the 1-bromoglucopyranosyl starting compounds. Alternatively, heterocyclizations of 2-deoxy-D-arabino-hex-1-enopyranosyl cyanide were also carried out. Test compounds were obtained by Zemplen debenzoylation, however, none of them showed significant inhibition of rabbit muscle glycogen phosphorylase b. (C) 2015 Elsevier Ltd. All rights reserved.