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Synthesis of N-CiproBoc-TEG-succinate 3 and N-CiproBoc-HEG-succinate 10. (a) Di-t-butyl dicarbonate, sodium hydroxide, water: Dioxane (1:1), 96%; (b) 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide, dimethylaminopyridine, dichloromethane, 20 h; and (c) triethylamine, dichloromethane, 12 h.
Abbreviations: HEG, hexaethylene glycol; TEG, triethylene glycol.
