Scheme 1.
Synthetic steps for generation of hyperbranched Alg-N3 and MDT/GA PAMAM, specifically: (1) 3,5-dicarboxyphenyl glycineamide; (2) PAMAM functionalized with MDT and GA; and (3) hyperbranched alginate azide. Key: (a) Chloroacetyl chloride, NaOH; (b) NH3; (c) EDC, NHS; (d) H2N-PEG-N3, EDC, NHS; and (e) 2-(diphenylphosphino)terephthalic acid 1-methyl-4-pentafluorophenyl diester, triethylamine, and glutaric anhydride.