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Synthesis of Hyperbranched Aminopolysaccharides
Author(s) -
Kadokawa Junichi,
Sato Mitsuru,
Karasu Masa,
Tagaya Hideyuki,
Chiba Koji
Publication year - 1998
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(19980918)37:17<2373::aid-anie2373>3.0.co;2-b
Subject(s) - monomer , branching (polymer chemistry) , polymerization , chemistry , polymer chemistry , nuclear magnetic resonance spectroscopy , organic chemistry , polymer
Sugar dihydroozaxole monomers with two free hydroxyl groups undergo acid‐catalyzed polymerization to hyperbranched aminopolysaccharides [Eq. (a)]. Their molecular weights were determined by the light‐scattering method to be between 2.3×10 5 and 7.6×10 5 . The degree of branching determined by 1 H NMR spectroscopy after reaction with [ i Pr 2 Si(Cl)] 2 O is close to the ideal value. Ts=MeC 6 H 4 SO 2 , CSA=10‐camphorsulfonic acid.