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- Title
N-Heterocyclic carbene catalysis--from simple organic reactions to polymerization of cyclic esters.
- Authors
Coulembier, Olivier; Raquez, Jean-Marie; Dubois, Philippe
- Abstract
N-Heterocyclic carbene catalysis-from simple organic reactions to polymerization of cyclic esters Summary - This contribution aims at reporting on very recent advances achieved in controlled ring-opening polymerization of dilactones as promoted by easily accessible N-heterocyclic carbenes (NHCs). Even though carbenes have been known as very unstable species for long, more recently discovered NHCderivatives proved to display higher stability making their handling much easier and allowing their use as efficient catalysts in various organic reactions. Remarkably, these metal-free catalysts display high reactivity in synthesis of aliphatic polyesters such as polylactides and poly ®-butyrolactone) s all characterized by well-tailored compositions, molecular weight, tacticity, and end-group fidelity while presenting narrow to very narrow molecular weight distribution. Interestingly, novel macromolecular architectures based on such aliphatic polyester building blocks have been made available, e.g. multi-armed star shaped copolyesters, H-shaped copolyesters or macrocyclic polyesters paving the way to new biomedical applications for this family of important biocompatible and biodegradable aliphatic polyesters.
- Subjects
PHYSICAL &; theoretical chemistry; POLYMERIZATION; CATALYSTS; HETEROCYCLIC compounds; CARBENES; ORGANIC reaction mechanisms; MOLECULAR weights; COPOLYMERS; BIOCOMPATIBILITY
- Publication
Polimery, 2008, Vol 53, Issue 4, p255
- ISSN
0032-2725
- Publication type
Article
- DOI
10.14314/polimery.2008.255