title: Synthesis, characterization and in vitro antimicrobial and biodegradability study of pseudo-poly(amino acid)s derived from N,N'-(pyromellitoyl)-bis-L-tyrosine dimethyl ester as a chiral bioactive diphenolic monomer.
abstract: In this investigation N,N'-(pyromellitoyl)-bis-L-tyrosine dimethyl ester (7) as a chiral bioactive diphenolic monomer was prepared in three steps. The aim of this work was to obtain novel optically and biologically active pseudo-poly(amino acid)s (PAA)s that are more soluble in common organic solvents while maintaining their high thermal stability. Thus, several new, highly soluble, thermally stable, optically active and biodegradable PAAs containing different amino acid moieties in the main chain were prepared with moderate molecular weights via direct polycondensation using tosyl chloride, pyridine and N,N'-dimethylformamide as a condensing agent. The resulting novel polymers were characterized with FT-IR, (1)H-NMR, elemental and thermogravimetric analysis techniques. In addition, in vitro toxicity and biodegradability behavior of the diphenolic monomer 7, different synthetic diacids (3a-3e) and obtained PAAs, which were investigated in culture media, showed that the synthesized compounds and polymers derived from them are biologically active and biodegradable under a natural environment.
authors.affiliation: Department of Chemistry, Organic Polymer Chemistry Research Laboratory, Isfahan University of Technology, Isfahan, 84156-83111, Islamic Republic of Iran. mallak@cc.iut.ac.ir
authors.forename: Shadpour
authors.initials: S
authors.lastname: Mallakpour
authors.forename: Farhang
authors.initials: F
authors.lastname: Tirgir
authors.forename: Mohammad R
authors.initials: MR
authors.lastname: Sabzalian
mesh_terms: D000890:Anti-Infective Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D005658:Fungi / Q000187:drug effects / Q000254:growth & development; D015394:Molecular Structure; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology; D012995:Solubility; D014443:Tyrosine / Q000031:analogs & derivatives* / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology
chemical_list: D000890:Anti-Infective Agents; D011108:Polymers; D014443:Tyrosine