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Ring-Opening Polymerization of rac-Lactide with Aluminum Chiral Anilido-Oxazolinate Complexes.


ABSTRACT: A series of dimethylaluminum complexes (L1a-i )AlMe2 (2a-i, where HL1a-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 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.

SUBMITTER: Bian S 

PROVIDER: S-EPMC4036730 | biostudies-literature | 2014 May

REPOSITORIES: biostudies-literature

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Ring-Opening Polymerization of <i>rac</i>-Lactide with Aluminum Chiral Anilido-Oxazolinate Complexes.

Bian Shi S   Abbina Srinivas S   Lu Zhengliang Z   Kolodka Edward E   Du Guodong G  

Organometallics 20140509 10


A series of dimethylaluminum complexes <b>(L</b><sup><b>1a</b>-<b>i</b></sup> )AlMe<sub>2</sub> (<b>2a</b>-<b>i</b>, where <b>HL</b><sup><b>1a</b>-<b>i</b></sup> = 2-(2'-ArNH)phenyl-4-R<sub>1</sub>-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 <i>rac</i>-lactide in toluene solution and und  ...[more]

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