Design, synthesis and antimycobacterial activity evaluation of natural oridonin derivatives
摘要:
In an effort to develop novel potent antitubercular drugs, thirty-one oridonin derivatives were designed and prepared. All the compounds obtained were screened for their in vitro activities against Mycobacterium phlei, Mycobacterium smegmatis and Mycobacterium marinum. Among them, thirteen compounds showed significant inhibitory activity against M. phlei with MICs less than 2 mu g/mL. Compounds 2k, 8d, 10c, 10d containing trans-cinnamic acid moiety were the most potent (MIC = 0.5 mu g/mL), comparable to the well-known antitubercular drug streptomycin. The preliminary structure-activity relationships (SARs) were also analyzed. (C) 2014 Elsevier Ltd. All rights reserved.
A series of enmein-type diterpenoid analogs (11–20) derived from natural kaurene-type diterpenoid oridonin were synthesized and biologicallyevaluated. All target compounds showed improved anti-proliferative activities against four human cancer cell lines compared with natural oridonin and parent compound 10. Some compounds were more potent than positive control Taxol. Furthermore, mechanistic investigation