Process for the preparation of substituted indenes and their use as ligand systems for metallocene catalysts

US5840948A · kind A · utility

Assignee

• Targor GmbH · DE

Inventors

• Jurgen Rohrmann · Kelkheim, DE
• Frank Kuber · Oberursel, DE

Key dates

• Filing date: Jun 5, 1995
• Grant date: Nov 24, 1998
• Expiry date: Jun 5, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/943
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the preparation of a compound of the formula IV or IVa ##STR1## in which R.sup.1 -R.sup.5 are preferably hydrogen or alkyl, which comprises reacting a compound I ##STR2## with a compound II ##STR3## in which X.sup.1 and X.sup.2 are preferably halogen, to give the corresponding indanones, which are converted into the compounds IV and IVa by reduction and dehydration. The compounds IV and IVa are important intermediate products for the preparation of chiral metallocene complexes which are suitable catalyst components for olefin polymerization.