Discovery of 5-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-7-phenyl-(E)-2,3,6,7-tetrahydro-1,4-thiazepines as a new series of apoptosis inducers using a cell- and caspase-based HTS assay
作者:John Drewe、Shailaja Kasibhatla、Ben Tseng、Emma Shelton、David Sperandio、Robert M. Yee、Joane Litvak、Martin Sendzik、Jeffrey R. Spencer、Sui Xiong Cai
DOI:10.1016/j.bmcl.2007.05.098
日期:2007.9
We report the discovery of 5-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-7-(4-methylphenyl)-(E)-2,3,6,7-tetrahydro-1,4-thiazepine (2a) as an inducer of apoptosis using our proprietary cell- and caspase-based HTS assay. Through structure activity relationship (SAR) studies, 5-(4-hydroxy-6-methyl-2-oxo-2H-pyran-3-yl)-7-(2-methoxy-4-(methylthio)phenyl)-(E)-2,3,6,7-tetrahydro-1,4-thiazepine (5d) was identified as a potent apoptosis inducer with an EC50 value of 0.08 mu M in T47D cells, which was > 15-fold more potent than screening hit 2a. Compound 5d also was found to be highly active in a growth inhibition assay with a GI(50) value of 0.05 mu M in T47D cells and to function as an inhibitor of tubulin polymerization. (c) 2007 Elsevier Ltd. All rights reserved.