Summary
Syntheses and physicochemical properties are described of several novel naphthoquinonyl amino acid derivatives, which are potential components in cytotoxic peptide conjugates. These compounds include N ε- and N α-naphthoquinonyl derivatives of lysine as well as N-naphthoquinonyl-carboxylic derivatives. The former class of compounds can be employed as building blocks in a stepwise peptide synthesis, whereas the latter two are adequate for postpeptide chain-assembly modifications. The ability of the naphthoquinonyl derivatives to produce semiquinone radicals and hydroxyl radicals (•OH), using chemical (i.e. NaBH4) and enzymatic (i.e. NADPH-cytochrome P-450 reductase) routes, respectively, was evaluated employing electron spin resonance spectroscopy.
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Rahimipour, S., Weiner, L., Fridkin, M. et al. Novel naphthoquinonyl derivatives: Potential structural components for the synthesis of cytotoxic peptides. Lett Pept Sci 3, 263–274 (1996). https://doi.org/10.1007/BF00127660
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DOI: https://doi.org/10.1007/BF00127660