Antitumor agents. 123. Synthesis and human DNA topoisomerase II inhibitory activity of 2'-chloro derivatives of etoposide and 4.beta.-(arylamino)-4'-O-demethylpodophyllotoxins
作者:Hong Hu、Su Ying Liu、Yung Chi Cheng、Kuo Hsiung Lee、Zhe Qing Wang
DOI:10.1021/jm00083a009
日期:1992.3
The 2'-chloro derivatives of etoposide and 4-beta-(arylamino)-4'-O-demethylpodophyllotoxins have been synthesized and evaluated for their inhibitory activity against the human DNA topoisomerase II as well as for their activity in causing cellular protein-linked DNA breakage. The results showed that none of the compounds are active as a result of the C-2' chloro substitution on ring E. This would suggest that the free rotation of ring E is essential for the aforementioned enzyme inhibitory activity. In addition, these 2'-chloro derivatives showed no significant cytotoxicity (KB).
Synthesis and evaluation of etoposide and podophyllotoxin analogs against topoisomerase IIα and HCT-116 cells
作者:Matthew B. Murphy、Priyanka Kumar、Amber M. Bradley、Christopher E. Barton、Joseph E. Deweese、Susan L. Mercer
DOI:10.1016/j.bmc.2020.115773
日期:2020.11
studies suggest halogenation at the C-2’ position of etoposide reduces metabolism. Halogens were introduced into the C-2’ position by electrophilic aromatic halogenation onto etoposide (ETOP, 1), podophyllotoxin (PPT, 2), and 4-dimethylepipodophyllotoxin (DMEP, 3), and to bridge the gap of knowledge regarding the activity of these metabolically stable analogs. Five halogenated analogs (6-10) were synthesized