Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 21, Issue 18, Pages 6686-6689Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201500387
Keywords
1,4-dilithio-1,3-butadienes; insertion reactions; metallacyclopentadienes; rare-earth metals
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Funding
- Natural Science Foundation of China
- 973 program from MOST of China [2012CB821600]
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The first well-defined lutetacyclopentadienes are synthesised from pentamethylcyclopentadienyl lithium (Cp*Li), 1,4-dilithio-1,3-butadienes, and LuCl3. The lutetacyclopentadiene shows excellent reactivity towards some small molecules, such as pivalaldehyde, Se, carbon dioxide, and isonitrile to efficiently construct 3-, 5-, 7-, 8-, and 9-membered rare-earth metallacycles. Both monoinsertion and double-insertion of two Lu-C-sp2 bonds are observed. Specially, the reaction between lutetacyclopentadiene and isonitrile afforded [3,5,5]-fused metallacycles. The distinguished reactivity can be attributed to the highly ionic character and the cooperative reactivity of two Lu-C-sp2 bonds.
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