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Literature DB >> 27325142

Zinc Complexes of Sequential Tetradentate Monoanionic Ligands in the Isoselective Polymerization of rac-Lactide.

Tomer Rosen¹, Yanay Popowski¹, Israel Goldberg¹, Moshe Kol².

Abstract

Zinc complexes of {ONNN}-type sequential tetradentate monoanionic ligands reacted with diethylzinc to give the mononuclear ethylzinc complexes. The benzyloxy complexes were formed readily and were found to be highly active as well as living/immortal catalysts for ring-opening polymerization of rac-lactic acid with a clear isospecific inclination. Chiral gas chromatography analysis revealed a mild preference for a given lactide enantiomer by the chiral catalysts.

Entities: Chemical

Keywords: enantioselectivity; gas chromatography; ligand design; ring-opening polymerization; zinc

Year: 2016 PMID： 27325142 DOI： 10.1002/chem.201601979

Source DB: PubMed Journal: Chemistry ISSN： 0947-6539 Impact factor: 5.236

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Cited

7 in total

1. A Single Catalyst for Promoting Reverse Processes: Synthesis and Chemical Degradation of Polylactide.

Authors: Federica Santulli; Marina Lamberti; Mina Mazzeo
Journal: ChemSusChem Date: 2021-11-02 Impact factor: 9.140

2. Phosphasalen Indium Complexes Showing High Rates and Isoselectivities in rac-Lactide Polymerizations.

Authors: Dominic Myers; Andrew J P White; Craig M Forsyth; Mark Bown; Charlotte K Williams
Journal: Angew Chem Int Ed Engl Date: 2017-04-05 Impact factor: 15.336

3. Tailor-made block copolymers of l-, d- and rac-lactides and ε-caprolactone via one-pot sequential ring opening polymerization by pyridylamidozinc(ii) catalysts.

Authors: Ilaria D'Auria; Massimo Christian D'Alterio; Consiglia Tedesco; Claudio Pellecchia
Journal: RSC Adv Date: 2019-10-14 Impact factor: 4.036

4. Synthesis, structures, and catalytic efficiency in ring opening polymerization of rac-lactide with tridentate vs. bidentate cobalt(ii), zinc(ii), and cadmium(ii) complexes containing N-substituted N,N-bis((3,5-dimethyl-1H-pyrazol-1-yl)methyl)amine ligands.

Authors: Solhye Choe; Hyosun Lee; Saira Nayab
Journal: RSC Adv Date: 2021-05-25 Impact factor: 4.036

Zinc Complexes of Sequential Tetradentate Monoanionic Ligands in the Isoselective Polymerization of rac-Lactide.

1. A Single Catalyst for Promoting Reverse Processes: Synthesis and Chemical Degradation of Polylactide.

2. Phosphasalen Indium Complexes Showing High Rates and Isoselectivities in rac-Lactide Polymerizations.

3. Tailor-made block copolymers of l-, d- and rac-lactides and ε-caprolactone via one-pot sequential ring opening polymerization by pyridylamidozinc(ii) catalysts.

4. Synthesis, structures, and catalytic efficiency in ring opening polymerization of rac-lactide with tridentate vs. bidentate cobalt(ii), zinc(ii), and cadmium(ii) complexes containing N-substituted N,N-bis((3,5-dimethyl-1H-pyrazol-1-yl)methyl)amine ligands.

5. Divergent [{ONNN}Mg-Cl] complexes in highly active and living lactide polymerization.

6. Undiscovered Potential: Ge Catalysts for Lactide Polymerization.

7. Next Generation of Zinc Bisguanidine Polymerization Catalysts towards Highly Crystalline, Biodegradable Polyesters.