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

[Image: see text] A series of dimethylaluminum complexes (L(1a–i))AlMe(2) (2a–i, where HL(1a–i) = 2-(2′-ArNH)phenyl-4-R(1)-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...

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Detalles Bibliográficos
Autores principales: Bian, Shi, Abbina, Srinivas, Lu, Zhengliang, Kolodka, Edward, Du, Guodong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2014
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4036730/
https://www.ncbi.nlm.nih.gov/pubmed/24891754
http://dx.doi.org/10.1021/om401226j
Descripción
Sumario:[Image: see text] A series of dimethylaluminum complexes (L(1a–i))AlMe(2) (2a–i, where HL(1a–i) = 2-(2′-ArNH)phenyl-4-R(1)-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.