In vitro cytotoxicity of 5-aminosubstituted 20(S)-camptothecins. part 1
1999
Abstract A number of 5-aminosubstituted 20( S )-camptothecin analogues were prepared via semi-synthesis starting from 20( S )-camptothecin and 9-methoxy 20( S )-camptothecin. In vitro anti-cancer activity of these analogues was determined using 60 human tumor cell line assay. Although water solubility of most of these compounds was improved compared to 20( S )-camptothecin, their anti-cancer activity was considerably diminished. However, only smaller substituents such as methylamine or hydroxylamine as present in 8s and 8t , respectively, showed good activity with improved water solubility.
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