Journal
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
Volume 18, Issue 2, Pages 603-607Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmcl.2007.11.078
Keywords
apoptosis inducers; anticancer agents; HTS assay; SAR
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As a continuation of our efforts to discover and develop apoptosis inducing 4-aryl-4H-chromenes as novel anticancer agents, we explored modifications at the 2- and 3-positions. It was found that replacement of the 3-cyano group by an ester, including metbyl and ethyl ester, resulted in > 200-fold reduction of activity. Conversion of the 2-amino group into an amide or urea resulted in 4- to 10-fold drop of activity. Similarly, converting the 2-amino group into a hydrogen resulted in 4- to 10-fold reduction of activity. Compound 3d was highly active with an EC50 value of 29 nM and a GI(50) value of 6 nM in T47D cells. Importantly, the 2H analog 3d was found to be much more stable under acidic conditions compared to the 2-NH2 analog 3b, suggesting that 2-H analogs might have better bioavailability than the 2-NH2 analogs. (c) 2007 Elsevier Ltd. All rights reserved.
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