Pentacyclic triterpenes. Part 5: Synthesis and SAR study of corosolic acid derivatives as inhibitors of glycogen phosphorylases
作者:Xiaoan Wen、Jun Xia、Keguang Cheng、Liying Zhang、Pu Zhang、Jun Liu、Luyong Zhang、Peizhou Ni、Hongbin Sun
DOI:10.1016/j.bmcl.2007.08.057
日期:2007.11
The synthesis and biological evaluation of corosolic acid derivatives and related compounds as inhibitors of rabbit muscle glycogen phosphorylase a is described. Within this series of compounds, 8 (IC(50)=7.31 microM), 12d (IC(50)=3.26 microM), and 12e (IC(50)=5.1 microM) exhibited more potent activities than the parent compound 1 (IC(50)=20 microM). SAR of these compounds is also discussed.
Naturally Occurring Pentacyclic Triterpenes as Inhibitors of Glycogen Phosphorylase: Synthesis, Structure−Activity Relationships, and X-ray Crystallographic Studies
作者:Xiaoan Wen、Hongbin Sun、Jun Liu、Keguang Cheng、Pu Zhang、Liying Zhang、Jia Hao、Luyong Zhang、Peizhou Ni、Spyros E. Zographos、Demetres D. Leonidas、Kyra-Melinda Alexacou、Thanasis Gimisis、Joseph M. Hayes、Nikos G. Oikonomakos
DOI:10.1021/jm8000949
日期:2008.6.1
Twenty-five naturallyoccurringpentacyclictriterpenes, 15 of which were synthesized in this study, were biologically evaluated as inhibitors of rabbit muscle glycogen phosphorylase a (GPa). From SAR studies, the presence of a sugar moiety in triterpene saponins resulted in a markedly decreased activity ( 7, 18- 20) or no activity ( 21, 22). These saponins, however, might find their value as potential