Géraldine Carrot, Jöns Hilborn, et al.
Macromolecules
We report spirocyclic imidazolidines derived from N-heterocyclic carbenes and β-lactones. These spirocycles are initiators for the zwitterionic ring-expansion polymerization of β-lactones to generate cyclic polyesters of well-defined molecular weight. The zwitterionic strategy based on the equilibrium between the zwitterionic intermediates and spiro macrocyclics enables the controlled synthesis of cyclic poly(β-lactone)s. Copyright © 2007 American Chemical Society.
Géraldine Carrot, Jöns Hilborn, et al.
Macromolecules
Julius F. Remenar, Craig J. Hawker, et al.
American Chemical Society, Polymer Preprints, Division of Polymer Chemistry
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American Chemical Society, Polymer Preprints, Division of Polymer Chemistry
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Biomaterials