Ring-hydroxylated analogs of lucanthone as antitumor agents

Abstract
A series of ring-alkoxylated and ring-hydroxylated analogs of lucanthone was prepared and tested for antitumor activity. The most biologically interesting members of this group were two 7-hydroxylucanthone derivatives [one of which was 1-((2-(dimethylamino)ethyl)amino)-7-hydroxy-4-methylthioxanthenone] which gave T/C values in the NCI [mouse leukemia] P-388 antitumor screen of 188 and 265, respectively. The apparent association constants and .DELTA.Tm [change in melting temperature] values for a number of analog-DNA complexes were determined to ascertain whether there was any quantitative correlation with biological activity. Intercalation may be a necessary but far from sufficient condition for antitumor activity.

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