Abderramane Amgoune

Controlled ring-opening polymerization of lactide by group 3 metal complexes

In this review, attention is focused on the use of group 3 metal complexes for the ring-opening polymerization (ROP) of lactide to give polylactides (PLAs). Synthesis of PLAs has been studied intensively due to their biocompatible and biodegradable properties and their potential applications in medical and agricultural fields. ROP of lactide, a cyclic diester of lactic acid, provides PLA. This review includes our recent research results and implications in developing new amino-bis(phenolate) group 3 initiators for the synthesis of polyesters.

Stereoselective ring-opening polymerization of racemic lactide using alkoxy-amino-bis(phenolate) group 3 metal complexes

Polymerization of racemic lactide initated by alkyl- and amido-yttrium complexes of a non-chiral tetradentate alkoxy-amino-bis(phenolate) ligand proceeds rapidly, in a controlled manner, to give heterotactic-rich polylactic acid.

Ring-opening polymerization of 3,6-dimethyl-2,5-morpholinedione with discrete amino-alkoxy-bis(phenolate) yttrium initiators: mechanistic insights

Alkoxy-amino-bis(phenolate) yttrium amide and alkoxide complexes promote the ring-opening polymerization of (3S,6S)-dimethyl-2,5-morpholinedione at 60-100 degrees C via a coordination-insertion polymerization mechanism.