Intramolecular NMe2H Elimination and Fulvene Coupling Leading to Novel Allyl-Bridged Zirconocene and Hafnocene Complexes

Intramolecular NMe2H Elimination and Fulvene Coupling Leading to Novel Allyl-Bridged Zirconocene and Hafnocene Complexes

Deprotonation of the aminofulvene 1 with LiCH(SiMe3)2 provides 2, which reacts with MCl4 (M=Zr or Hf) by intramolecular NMe2H elimination and coupling of the fulvene moieties to form complex 3 or 4. This reaction is a useful synthetic pathway to allyl‐bridged ansa‐metallocenes, especially those with...

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Veröffentlicht in:Angewandte Chemie International Edition 1999-07, Vol.38 (13-14), p.1926-1928
Hauptverfasser: Bai, Sheng-Di, Wei, Xue-Hong, Guo, Jian-Ping, Liu, Dian-Sheng, Zhou, Zhong-Yuan
Format: Artikel
Sprache:eng
Schlagworte:
Ansa compounds
C−C coupling
Hafnium
Sandwich complexes
Zirconium
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Zusammenfassung:Deprotonation of the aminofulvene 1 with LiCH(SiMe3)2 provides 2, which reacts with MCl4 (M=Zr or Hf) by intramolecular NMe2H elimination and coupling of the fulvene moieties to form complex 3 or 4. This reaction is a useful synthetic pathway to allyl‐bridged ansa‐metallocenes, especially those with a conjugated 14 π electron system. R′=dimethylamino.
ISSN:1433-7851
1521-3773
DOI:10.1002/(SICI)1521-3773(19990712)38:13/14<1926::AID-ANIE1926>3.0.CO;2-D