Discovery of substituted 4-anilino-2-arylpyrimidines as a new series of apoptosis inducers using a cell- and caspase-based high throughput screening assay. 2. Structure–activity relationships of the 2-aryl group
作者:Nilantha Sirisoma、Azra Pervin、Bao Nguyen、Candace Crogan-Grundy、Shailaja Kasibhatla、Ben Tseng、John Drewe、Sui Xiong Cai
DOI:10.1016/j.bmcl.2009.02.074
日期:2009.4
As a continuation of our efforts to discover and develop the apoptosis inducing 4-anilino-2-(2-pyridyl) pyrimidines as potential anticancer agents, we explored replacing the 2-pyridyl group by other aryl groups. SAR studies showed that the 2-pyridyl group can be replaced by a 3-pyridyl, 4-pyridyl and 2-pyrazinyl group, and that the SAR for the anilino group was similar to that of the 2-pyridyl series. However, replacement of the 2-pyridyl group by a phenyl group, a 3,5-dichloro-4-pyridyl group, or a saturated ring led to inactive compounds. Several potent compounds, including 2f, 3d, 3j and 4a, with EC50 values of 0.048-0.024 mu M in the apoptosis induction assay against T47D cells, were identified through the SAR studies. In a tubulin polymerization assay, compound 2f, which was active against all the three cell lines tested (T47D, HTC116 and SNU398), inhibited tubulin polymerization with an IC50 value of 0.5 mu M, while compound 2a, which was active against T47D cells but not active against HTC116 and SNU398 cells, was not active in the tubulin assay at up to 50 mu M. (c) 2009 Elsevier Ltd. All rights reserved.