Synthesis of Fluorescence-Labelled Glycosidic Prodrugs Based on the Cytotoxic Antibiotic Duocarmycin†

The synthesis of the glycosidic prodrugs (1S)-30a, (1S,10R)-30b and (1S,10R)-32 labelled with different fluorescence dyes at different positions at the aromatic A-ring in 2 is described ; the compounds are structurally based on the cytotoxic antibiotic duocarmycin SA. For binding, the amino compounds (1S)-3a and (1S,10R)-3b were treated with the commercially available succinimides of the dyes 5-SFX (29) and D10162 (31), respectively.