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'Spirocyclopropanes' in keywords Facet   Publication Year 1994  [X]
Facet   section ZfN Section B  [X]
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1Author    Bernhard Rieger, Gerhard Jany, M.Anfred Steimann, Riad FawziRequires cookie*
 Title    Synthesis of Ethylene Bridged Biscyclopentadiene Ligand Precursor Compounds and Some of their a/isa-Zirconocene Derivatives via Chiral Epoxides: A Synthetic Strategy of High Variability  
 Abstract    The chiral ligand precursor systems [l-C p M -R '-2 -R 2-2-Cp2]ethane 5 a -d bearing two dif­ ferent cyclopentadienyl fragments (C p1, Cp2 = Cp, Ind, Flu) and a variable bridge substitu­ tion pattern (R 1, R2 = H, Ph, cyclopentyl, cyclohexyl) were prepared starting from the corre­ sponding epoxides. The solid state structures o f six organic intermediates are reported in order to prove the stereochemistry o f the ligand form ing reactions. Treatment o f the dilithio salts o f 5a~d with ZrCl4 in C H 2C12 afforded chiral a«sa-zirconocene dichlorides (6a-d). 
  Reference    Z. Naturforsch. 49b, 451 (1994); eingegangen am 20. Oktober 1993 
  Published    1994 
  Keywords    Chiral Epoxides, Fluorenyl A lcohols, Spirocyclopropanes, Biscyclopentadienes, Chiral ansa-Zirconocene Dichlorides 
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 TEI-XML for    default:Reihe_B/49/ZNB-1994-49b-0451.pdf 
 Identifier    ZNB-1994-49b-0451 
 Volume    49