期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 20, 期 17, 页码 4880-4884出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201400055
关键词
cobalt; cyclopropanation; homogeneous catalysis; molecular flasks; porphyrins; radical chemistry
资金
- Netherlands Organization for Scientific Research (NWO-CW VICI) [016.122.613]
- European Research Council (ERC) [202886-CatCIR]
- University of Amsterdam
- Alexander von Humboldt Foundation
- Solar Technologies Go Hybrid initiative of the State of Bavaria
A cobalt-porphyrin catalyst encapsulated in a cubic M8L6 cage allows cyclopropanation reactions in aqueous media. The caged-catalyst shows enhanced activities in acetone/water as compared to pure acetone. Interestingly, the M8L6 encapsulated catalyst reveals size-selectivity. Smaller substrates more easily penetrate through the pores of the molecular ship-in-a-bottle catalysts and are hence converted faster than bigger substrates. In addition, N-tosylhydrazone sodium salts are easy to handle reagents for cyclopropanation reactions under these conditions.
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