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Synthesis of Amino Acids Analogues of Citric Acid Siderophores

2-tert-buiyl- Three amino acid analogues of citric acid siderophores were synthesized. The synthetic strategy involved condensation of 2-tert-butyl-1,3-di(N-hydroxysuccinimidyl) or 1,3-bis(pentachlorophenyl)citrates with N-ethyl-ω-aminoalkylhydroxamates. The examination of biological properties of the obtained compounds revealed their poor, if any siderophore activity and thus confirmed the structural requirements previously suggested for siderophores of this type.