Abstract
The piperidine fragment in ceritinib was replaced with diverse aliphatic amines to improve inherent resistance issues of ceritinib. While most of the prepared compounds exhibit as similar in vitro activities as ceritinib, compound 10 shows encouraging activities against wild-type ALK as well as crizotinib-resistant mutants including extremely resistant G1202R mutant with an IC50 of 1.8 nM. Furthermore, pharmacokinetic profiles of 10 is apparently better than that of ceritinib. In murine xenograft studies, compound 10 turns out to be as active as ceritinib, suggesting that further optimization of 10 may lead to clinical candidates overcoming ALK mutant issues.
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