The present invention provides compounds of the general structure:
which are substituted at the 3 and 28 positions, along with pharmaceutical formulations containing the same and methods of treating viral infections employing the same.
We previously reported that [[N-[3 beta-hydroxyllup-20(29)-en-28-oyl]-7-aminoheptyl]carbamoyl]methane (A43D, 4) was a potent HIV-1 entry inhibitor. However, 4 was inactive against HIV-2 virus, suggesting the structural requirements for targeting these two retroviruses are different. In this study, a series of new betulinic acid derivatives were synthesized, and some of them displayed selective anti-HIV-2 activity at nanomolar concentrations. In comparison to compounds with anti-HIV-1 activity, a shorter C-28 side chain is required for optimal anti-HIV-2 activity.
Synthesis and anti-HIV activity of bi-functional betulinic acid derivatives
作者:Li Huang、Phong Ho、Kuo-Hsiung Lee、Chin-Ho Chen
DOI:10.1016/j.bmc.2005.11.016
日期:2006.4
Betulinicacid (BA) derivatives with a side chain at C-3 can inhibit HIV-1 maturation. On the other hand, BA derivatives with a side chain at C-28 can block HIV-1 entry. In order to combine the anti-maturation and anti-entry activities in a single molecule, new bi-functional BA derivatives containing side chains at C-3 and C-28 have been synthesized. The most potent compound ([[N-[3beta-O-(3',3'-d