4 years ago

New Highly Active Salen-based Aluminum Catalyst for the Coupling of Carbon Dioxide with Epoxides at Ambient Temperature

Kyunglim Hyun, Junseong Lee, Won Hee Woo, Youngjo Kim, Yoseph Kim, Min Kim, Myung Hwan Park, Ji Yeon Ryu
A novel aluminum complex, [(naph)salen]AlMe [(naph)salen = N,N'-(2,3-naphthalene)bis(3,5-dimethylsalicylideneiminato)], has been synthesized and fully characterized by NMR spectroscopy, high-resolution mass spectrometry, elemental analysis, and single-crystal X-ray diffraction. The complex exhibits square pyramidal geometry around the aluminum center in the solid-state structure, and it has a trigonality parameter (τ) of 0.13. Comparison of the catalytic activity of [(naph)salen]AlMe with that of four related aluminum complexes containing tetradentate salen ligands with different bridging groups revealed that the naphthyl bridged salen-based aluminum complex, in conjunction with tetra(n-butyl)ammonium iodide as a cocatalyst, showed higher catalytic activity than the other complexes for the coupling of CO2 with epoxides under the mild conditions of room temperature and 5 bar of CO2 in 12 h. In addition, the new salen complex [(naph)salen]AlMe showed favorable features, such as requiring low catalyst loading (0.5 mol%) and broad epoxide substrate scope, including six terminal epoxides and three internal epoxides.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/ejic.201701169

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.