title: Ring-Opening Polymerization ofrac-Lactide with Aluminum Chiral Anilido-Oxazolinate Complexes.
abstract: A series of dimethylaluminum complexes(L1a-i)AlMe2(2a-i, whereHL1a-i= 2-(2'-ArNH)phenyl-4-R1-oxazoline) bearing chiral, bidentate anilido-oxazolinate ligands have been prepared and characterized. Six of the complexes, in the presence of an alcohol cocatalyst, are shown to be active initiators for the stereoselective ring-opening polymerization ofrac-lactide in toluene solution and under bulk conditions, yielding polylactides with a range of tacticity from slightly isotactic to moderately heterotactic. The reactivity and selectivity of these catalysts are discussed on the basis of the effect of their substituents.
authors.affiliation: Department of Chemistry, University of North Dakota , 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States.
authors.forename: Shi
authors.initials: S
authors.lastname: Bian
authors.affiliation: Department of Chemistry, University of North Dakota , 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States.
authors.forename: Srinivas
authors.initials: S
authors.lastname: Abbina
authors.affiliation: Department of Chemistry, University of North Dakota , 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States.
authors.forename: Zhengliang
authors.initials: Z
authors.lastname: Lu
authors.affiliation: Department of Chemical Engineering, University of North Dakota , Grand Forks, North Dakota 58203, United States.
authors.forename: Edward
authors.initials: E
authors.lastname: Kolodka
authors.affiliation: Department of Chemistry, University of North Dakota , 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States.
authors.forename: Guodong
authors.initials: G
authors.lastname: Du