Synthesis of Ethylene Bridged Biscyclopentadiene Ligand Precursor Compounds and Some of their ansa-Zirconocene Derivatives Chiral Epoxides: A Synthetic Strategy of High Variability

Bernhard Rieger, Gerhard Jany, Manfred Steimann, Riad Fawzi

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

19 Zitate (Scopus)

Abstract

The chiral ligand precursor systems [1-Cp1-1-R1-2-R-2-2-Cp2]ethane 5a–d bearing two different cyclopentadienyl fragments (Cp1, Cp2 = Cp, Ind, Flu) and a variable bridge substitution pattern (R1, R2 = H, Ph, cyclopentyl, cyclohexyl) were prepared starting from the corresponding epoxides. The solid state structures of six organic intermediates are reported in order to prove the stereochemistry of the ligand forming reactions. Treatment of the dilithio salts of 5a–d with ZrCl4 in CH2Cl2 afforded chiral ansa-zirconocene dichlorides (6a–d).

OriginalspracheEnglisch
Seiten (von - bis)451-458
Seitenumfang8
FachzeitschriftZeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
Jahrgang49
Ausgabenummer4
DOIs
PublikationsstatusVeröffentlicht - 1 Apr. 1994
Extern publiziertJa

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