Journal
CHEMCATCHEM
Volume 9, Issue 6, Pages 946-949Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201601690
Keywords
carbon dioxide; cyclic carbonates; epoxides; homogeneous catalysts; porphyrinoids
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Funding
- Japan Society for the Promotion of Science (JSPS) KAKENHI [JP16H01030]
- Grants-in-Aid for Scientific Research [16H01030] Funding Source: KAKEN
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Bifunctional ZnII porphyrin catalysts bearing tributylammonium bromide groups at the meta positions of the meso-phenyl groups showed high catalytic activity for the synthesis of cyclic carbonates from epoxides and CO2. Herein, several substituents with different electronic properties were introduced at the para positions. Introduction of electron-donating groups decreased the catalytic activity, whereas the introduction of electron-withdrawing groups increased the activity. The substituents modulated the Lewis acidity of the zinc center, which was confirmed by binding constant experiments. The bifunctional catalyst bearing cyano groups showed the highest catalytic activity with a turnover frequency of up to 42000 h(-1).
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