title: Novel water-soluble quaternary piperazine derivatives of chitosan: synthesis and characterization.
abstract: Novel synthesis methods for the preparation of quaternary piperazine derivatives of chitosan were developed. Quaternary ammonium moiety can be selectively inserted into either one or both of the piperazine nitrogens, yielding structurally uniform chitosan derivative structures. Water-soluble end products were thoroughly characterized with FT-IR, 1H NMR, 13C NMR and 2D 1H-13C HSQC NMR. The molecular weights of the end products were determined by GPC with triple detection.
authors.affiliation: Department of Pharmaceutical Chemistry, University of Kuopio, P.O. Box 1627, FIN-70211 Kuopio, Finland. Jukka.Holappa@uku.fi
authors.forename: Jukka
authors.initials: J
authors.lastname: Holappa
authors.forename: Tapio
authors.initials: T
authors.lastname: Nevalainen
authors.forename: Rustam
authors.initials: R
authors.lastname: Safin
authors.forename: Pasi
authors.initials: P
authors.lastname: Soininen
authors.forename: Tomas
authors.initials: T
authors.lastname: Asplund
authors.forename: Tiina
authors.initials: T
authors.lastname: Luttikhedde
authors.forename: Már
authors.initials: M
authors.lastname: Másson
authors.forename: Tomi
authors.initials: T
authors.lastname: Järvinen
mesh_terms: D001672:Biocompatible Materials / Q000138:chemical synthesis / Q000737:chemistry; D048271:Chitosan / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000737:chemistry; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010879:Piperazines / Q000138:chemical synthesis / Q000737:chemistry; D012995:Solubility; D014867:Water
chemical_list: D001672:Biocompatible Materials; D010879:Piperazines; D014867:Water; D048271:Chitosan