Molecular design, synthesis and docking study of benz[b]oxepines and 12-oxobenzo[c]phenanthridinones as topoisomerase 1 inhibitors
作者:Suh-Hee Lee、Hue Thi My Van、Su Hui Yang、Kyung-Tae Lee、Youngjoo Kwon、Won-Jea Cho
DOI:10.1016/j.bmcl.2009.03.058
日期:2009.5
Benz[b]oxepines 4a-g and 12-oxobenzo[c]phenanthridines 5a-d were designed and synthesized as constrained forms of 3-arylisoquinolines through an intramolecular radical cyclization reaction. Radical cyclization of O-vinyl compounds preferentially led to the 7-endo-trig cyclization pathway to the benz[b] oxepines and 12-oxobenzo[c]phenanthridines through 6-exo-trig path as minor products. Among the synthesized compounds, benz[b]oxepine derivative 4e exhibited potent in vitro cytotoxicity against three different tumor cell lines, as well as topoisomerase 1 inhibitory activity. A Surflex-Dock docking study was performed to clarify the topoisomerase 1 activity of 4e. (c) 2009 Elsevier Ltd. All rights reserved.