natural friedelane triterpenoid, can disrupt the Hsp90–Cdc37 interaction to provide antitumor effects. In this study, 31 new celastrol derivatives, 2a–2d, 3a–3g, and 4a–4t, were designed and synthesized, and their Hsp90–Cdc37 disruption activities and antiproliferative activities against cancer cells were evaluated. Among these compounds, 4f, with the highest tumor cell selectivity (15.4-fold), potent
A series of 3-carbamate and 29-ester celastrol derivatives (compounds 1–26) were designed and synthesized. These analogues were evaluated for their cytotoxic activities against several cancer cell lines. Cytotoxicity data revealed that the properties of substituents and substitution position had important influence on cytotoxic activity. Modification of C-3 hydroxyl with size-limited groups did not
Synthesis and Biological Evaluation of Celastrol Derivatives as Potential Immunosuppressive Agents
作者:Qi-Wei He、Jia-Hao Feng、Xiao-Long Hu、Huan Long、Xue-Feng Huang、Zhen-Zhou Jiang、Xiao-Qi Zhang、Wen-Cai Ye、Hao Wang
DOI:10.1021/acs.jnatprod.0c00067
日期:2020.9.25
a friedelane-type triterpenoid isolated from the genus Triperygium, possesses antitumor, anti-inflammatory, and immunosuppressive activities. A total of 42 celastrol derivatives (1a–1t, 2a–2l, and 3a–3j) were synthesized and evaluated for their immunosuppressive activities. Compounds 2a–2e showed immunosuppressive effects, with IC50 values ranging from 25 to 83 nM, and weak cytotoxicity (CC50 > 1 μM)
A classical Friedel-Craftsalkylation of different indoles catalyzed by AlCl3·6H2O has been developed for a well-known important natural product, celastrol, resulting in a series of derivatives for further biological evaluation. The catalyst loading was reduced to 5 mol %, the reaction proceeds at ambient temperature and reaction time is only 3 h. The product yields range from 20% to 99%. A reaction