2007
DOI: 10.1016/j.bmcl.2007.09.005
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Synthesis of (aryloxyacetylamino)-isonicotinic/nicotinic acid analogues as potent hypoxia-inducible factor (HIF)-1α inhibitors

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Cited by 28 publications
(21 citation statements)
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“…In an assay that measured hypoxia-induced HIF-1a activation in two cancer cell lines, 25 was at least 6-fold times more active than the des-adamantyl analogue [118]. While structureeactivity relationships showed that the adamantyl group was essential in maintaining activity as an HIF-1a inhibitor, the exact role of the adamantyl group was not clear [118,119]. Compound 25a was twofold more active than 25 in these assays and has progressed to further in vitro and in vivo studies.…”
Section: Anticancer Agentsmentioning
confidence: 95%
“…In an assay that measured hypoxia-induced HIF-1a activation in two cancer cell lines, 25 was at least 6-fold times more active than the des-adamantyl analogue [118]. While structureeactivity relationships showed that the adamantyl group was essential in maintaining activity as an HIF-1a inhibitor, the exact role of the adamantyl group was not clear [118,119]. Compound 25a was twofold more active than 25 in these assays and has progressed to further in vitro and in vivo studies.…”
Section: Anticancer Agentsmentioning
confidence: 95%
“…Among the nicotinic derivatives, only the nicotinic methyl ester maintained some activity in the Hep3B cell line, with an IC 50 value of 5.9 μM. Acids and amides were not active, exhibiting IC 50 values >30 μM . There are some inconsistencies in the activity of these derivatives among different cell lines.…”
Section: Adamantyl‐based Inhibitorsmentioning
confidence: 99%
“…Similar to LW6, the isonicotinic ester 5a, acid 5b, and isonicotinamide 5c derivatives exhibited similar or better potency in the Hep3B cell line with IC 50 values of 1.2, 1.0, and 3.1 M, respectively, whereas bulkier amides were less active or lost their activity completely (IC 50 => 30 M for 5d, 3.4 M for 5e, and >30 M for 5f, Table 3). Among the nicotinic derivatives, only the nicotinic methyl ester maintained some activity in the Hep3B cell line, with an IC 50 value of 5.9 M. Acids and amides were not active, exhibiting IC 50 values >30 M. 20,21 There are some inconsistencies in the activity of these derivatives among different cell lines. These inconsistencies may arise due to the different genetic backgrounds and molecular lesions of different cell lines or the physiochemical properties of these derivatives.…”
Section: Adamantyl-based Inhibitorsmentioning
confidence: 99%
“…Pyridine moiety serves as a good bioisosteric replacement for phenyl portion and the position of nitrogen atom at pyridine ring is important for potency. 2) as to the adamantyl phenyl ring A, the presence of the adamantyl substituent, or an equivalent, on ring A is essential for effective inhibition of HIF-1 under hypoxia and the replacement of adamantyl group with a substituted phenyl ring would cause a significant loss of activity [171,172]. Future directions of this class of HIF-1 inhibitors are to complement the framework of SARs for rational drug design and to promote the available preclinical results of these promising analogues to clinical trials.…”
Section: (Aryloxyacetylamino)benzoic Acid Analog-uesmentioning
confidence: 99%