Crown ether complexes of sodium and potassium 2-(benzotriazol-2-yl)phenolates: Synthesis and catalysis towards the ring-opening polymerization of rac-lactide |
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| Authors: | Lu-Lu Tian Bing-Bing Wu |
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| Affiliation: | Department of Chemistry, University of Science and Technology of China and CAS Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Hefei, Anhui, P. R. China |
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| Abstract: | Crown ether complexes of sodium and potassium 2-(benzotriazol-2-yl)phenolates were synthesized and characterized. In the presence of BnOH these complexes are highly active catalysts for the controlled ring-opening polymerization of rac-lactide. The polymerizations are iso-selective and the Pm of polylactide reached 0.77 when the polymerization was performed in toluene at ?60°C; whereas heterorich-polylactide was obtained when the polymerization was carried out in CH2Cl2 or THF. |
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| Keywords: | sodium and potassium complex phenoxy ligand catalysis rac-lactide polymerization |
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