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Updated: Apr 28, 2026

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Published on: November 21, 2017
Ring-Opening Polymerization of rac-Lactide with Aluminum Chiral Anilido-Oxazolinate Complexes
Shi Bian1, Srinivas Abbina1, Zhengliang Lu1
1Department of Chemistry, University of North Dakota , 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States.
Abstract:
A series of dimethylaluminum complexes (L )AlMe2 (2a-i, where HL = 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 of rac-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.
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