Highly heteroselective ring-opening polymerization of <i>rac</i>-lactide initiated by rare-earth alkoxides bearing chiral [NNOO]-type amine-bis(phenolate) ligands
Yu-Lai Duan, Qian Guo, Guiyang Liu, Zhongzhou Yi, Shaoping Feng, Yong Huang
Abstract
Rare-earth alkoxides [( S )-LM(O i Pr)] bearing chiral [NNOO]-type tripodal amine-bridged bis(phenolate) ligands have been successfully synthesized and used as catalysts with high activity for ROP of rac -LA to afford heterotactically enriched polymers.
Topics & Concepts
Amine gas treatingRare earthPolymerizationChemistryBearing (navigation)Polymer chemistryPolymerCatalysisRing-opening polymerizationRing (chemistry)LactideOrganic chemistryMineralogyGeographyCartographybiodegradable polymer synthesis and propertiesCarbon dioxide utilization in catalysisOrganometallic Complex Synthesis and Catalysis