Thermally stable dialkylzirconocenes with beta-hydrogens. Synthesis and diastereoselectivity

Authors
Wendt, OF Bercaw, JE
Citation
Of. Wendt et Je. Bercaw, Thermally stable dialkylzirconocenes with beta-hydrogens. Synthesis and diastereoselectivity, ORGANOMETAL, 20(18), 2001, pp. 3891-3895
Citations number
20
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
ORGANOMETALLICS
ISSN journal
02767333 → ACNP
Volume
20
Issue
18
Year of publication
2001
Pages
3891 - 3895
Database
ISI
SICI code
0276-7333(20010903)20:18<3891:TSDWBS>2.0.ZU;2-6
Abstract
Alkylation Of (CP2ZrCl2)-Zr-r (Cp-r = Cp (eta (5)-C5H5), Cp '(eta (5)-C5H4M e), Cp* (eta (5)-C5Me5)) and CpCp*Zr(CH3)Cl with 1-lithio-2-methylpentane ( (RLi)-Li-1) gives the corresponding dialkylzirconocenes (Cp2ZrR21)-Zr-r and CpCp*Zr(CH3)R-1, in high yields. Such alkyls have unprecedented thermal st abilities, especially for the CpCp* ligand framework. The diastereomers of the (Cp2ZrR21)-Zr-r complexes are formed in a statistical distribution, whe reas the diastereomers of CpCp*Zr(CH3)R-1 form in a 2:3 ratio.