Racemoselective preparation of bridged metallocene complexes having unsubstituted or 2-substituted indenyl ligands
US7358381B2 · kind B2 · utility
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28Claims
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Key dates
| Filing date | Oct 22, 2003 |
| Grant date | Apr 15, 2008 |
| Priority date | — |
| Expiry date | Nov 3, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a process for preparing racemic metallocene complexes by reacting transition metal complexes with cyclopentadienyl derivatives of alkali metals or alkaline earth metals and heating the reaction mixture obtained in this way to a temperature in the range from −78 to 250° C., to the corresponding metallocene complexes themselves and to their use as catalysts or as constituents of catalysts for the polymerization of olefinically unsaturated compounds or as reagents or catalysts in stereoselective synthesis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.