Synthesis of novel ursolic acid heterocyclic derivatives with improved abilities of antiproliferation and induction of p53, p21waf1 and NOXA in pancreatic cancer cells
作者:Ana S. Leal、Rui Wang、Jorge A.R. Salvador、Yongkui Jing
DOI:10.1016/j.bmc.2012.08.010
日期:2012.10
heterocyclic derivatives of ursolicacid 1 were synthesized and evaluated for their antiproliferative activity against AsPC-1 pancreatic cancercells. Compounds 24–32, with an α,β unsaturated ketone in conjugation with an heterocyclic ring in ring A have improved antiproliferative activities. Compound 32 is the most active compound with an IC50 of 1.9 μM which is sevenfold more active than ursolicacid 1. Compound
Semisynthesis, cytotoxicity, antimalarial evaluation and structure-activity relationship of two series of triterpene derivatives
作者:Simone Tasca Cargnin、Andressa Finkler Staudt、Patrícia Medeiros、Daniel de Medeiros Sol Sol、Ana Paula de Azevedo dos Santos、Fernando Berton Zanchi、Grace Gosmann、Antonio Puyet、Carolina Bioni Garcia Teles、Simone Baggio Gnoatto
DOI:10.1016/j.bmcl.2017.12.060
日期:2018.2
semisynthesis of two series of ursolic and betulinic acid derivatives through designed by modifications at the C-3 and C-28 positions and demonstrate their antimalarial activity against chloroquine-resistant P. falciparum (W2 strain). Structural modifications at C-3 were more advantageous to antimalarial activity than simultaneous modifications at C-3 and C-28 positions. The ester derivative, 3β-butanoyl betulinic