Single-component catalyst/initiators for the organocatalytic ring-opening polymerization of lactide
Szilárd Csihony1, Darcy A Culkin, Alan C Sentman
1Center for Polymeric Interfaces and Macromolecular Assemblies, Department of Chemistry, Stanford University, Stanford, California 94305, USA.
Abstract:
The synthesis and characterization of a series of primary and secondary alcohol adducts of 1,3-dimesitylimidazolin-2-ylidene is described. These adducts are stable as solids at room temperature, but readily release alcohol and the free carbene in solution. These alcohol adducts function as excellent single-component catalyst/initiators for the ring-opening polymerization of lactide under mild conditions, providing polymers with controlled molecular weights and narrow polydispersities. Multifunctional adducts were used to prepare poly(lactide)s of more complex architectures.
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