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Abstract
To improve the in vitro potency of the c-Src inhibitor 1a and to address its hERG liability, a structure–activity study was carried out, focusing on two regions of the lead compound. The blockade of the delayed cardiac current rectifier K + ( I Kr) channel was overcome by replacing the ethylenediamino group with an amino alcohol group at the 7-position. In addition, modifying the substituents at the 5-position and the side chain groups on the amino alcohols at the 7-position enhanced the intracellular c-Src inhibitory activity and increased central nervous system (CNS) penetration. In the present study, 6l exhibited significant in vivo efficacy in a middle cerebral artery (MCA) occlusion model in rats.
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