Synthesis of 3-Deoxypentacyclic Triterpene Derivatives as Inhibitors of Glycogen Phosphorylase
作者:Pu Zhang、Jia Hao、Jun Liu、Qian Lu、Huaming Sheng、Luyong Zhang、Hongbin Sun
DOI:10.1021/np9002367
日期:2009.8.28
3-deoxy-2-keto derivatives 5 and 7 of oleanolic acid (1) and ursolic acid (2), respectively, served as precursors to the synthesis of 35 3-deoxy derivatives of pentacyclic triterpenes. The synthesized compounds were biologically assayed for their inhibitory activity against rabbit muscle glycogenphosphorylase a (GPa). Among this series of compounds, 2α-hydroxyurs-12-en-28-oic acid (18) (IC50 = 1.2