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Intramolecular NMe 2 H Elimination and Fulvene Coupling Leading to Novel Allyl‐Bridged Zirconocene and Hafnocene Complexes
Author(s) -
Bai ShengDi,
Wei XueHong,
Guo JianPing,
Liu DianSheng,
Zhou ZhongYuan
Publication year - 1999
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/(sici)1521-3773(19990712)38:13/14<1926::aid-anie1926>3.0.co;2-d
Subject(s) - fulvene , intramolecular force , chemistry , coupling (piping) , photochemistry , stereochemistry , materials science , metallurgy
Deprotonation of the aminofulvene 1 with LiCH(SiMe 3 ) 2 provides 2 , which reacts with MCl 4 (M=Zr or Hf) by intramolecular NMe 2 H 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.