Bian Shi, Abbina Srinivas, Lu Zhengliang, Kolodka Edward, Du Guodong
Department of Chemistry, University of North Dakota , 151 Cornell Street Stop 9024, Grand Forks, North Dakota 58202, United States.
Department of Chemical Engineering, University of North Dakota , Grand Forks, North Dakota 58203, United States.
Organometallics. 2014 May 27;33(10):2489-2495. doi: 10.1021/om401226j. Epub 2014 May 9.
A series of dimethylaluminum complexes )AlMe (-, where = 2-(2'-ArNH)phenyl-4-R-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 -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.
已经制备并表征了一系列带有手性双齿苯胺基恶唑啉配体的二甲基铝配合物（( )AlMe，其中 = 2-(2'-ArNH)苯基-4-R-恶唑啉）。在醇助催化剂存在下，其中六种配合物被证明是甲苯溶液和本体条件下丙交酯立体选择性开环聚合的活性引发剂，可得到从轻度全同立构到中度间同立构的一系列立构规整度的聚丙交酯。基于取代基的影响讨论了这些催化剂的反应性和选择性。
