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Updated: May 13, 2026

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Published on: January 15, 2018
Aniline-catalyzed reductive amination as a powerful method for the preparation of reducing end-"clickable"
Alexandre Guerry1, Julien Bernard, Eric Samain
1Centre de Recherches sur les Macromolécules Végétales, CERMAV-CNRS (Affiliated with Université Joseph Fourier, member of the Institut de Chimie Moléculaire de Grenoble and of the PolyNat Carnot Institute), BP 53, 38041 Grenoble cedex 9, France.
Abstract:
Functionalized oligosaccharides are useful intermediates to prepare products for biological research or for the development of advanced functional materials. Here, we report the unprecedented use of aniline as an efficient organocatalyst reaction with "clickable" (azide or alkyne) amine for the transimination-mediated reductive amination of a chitooligosaccharide. Moreover, we demonstrate that alkyne-bearing aniline constitutes an excellent tool for the easy derivatization of chitosan oligosaccharides. Evidence for such improvement has been illustrated by the straightforward design of a FRET substrate to probe chitinase activity and of amphiphilic polycaprolactone-grafted-chitosan. This efficient methodology paves the way to the preparation of novel chitosan oligosaccharide-based advanced materials.
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