Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 1, Pages 134-138Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201409729
Keywords
carbon dioxide fixation; cyclic carbonates; homogeneous catalysis; porphyrinoids; zinc
Categories
Funding
- ENEOS Hydrogen Trust Fund
- Okayama Foundation for Science and Technology
Ask authors/readers for more resources
Highly active bifunctional diporphyrin and triporphyrin catalysts were synthesized through Stille coupling reactions. As compared with a porphyrin monomer, both exhibited improved catalytic activities for the reaction of CO2 with epoxides to form cyclic carbonates, because of the multiple catalytic sites which cooperatively activate the epoxide. Catalytic activities were carefully investigated by controlling temperature, reaction time, and catalyst loading, and very high turnover number and turnover frequency were obtained: 220000 and 46000h(-1), respectively, for the magnesium catalyst, and 310000 and 40000h(-1), respectively, for the zinc catalyst. Results obtained with a zinc/free-base hybrid diporphyrin catalyst demonstrated that the Br- ions on the adjacent porphyrin moiety also function as nucleophiles.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available