Process for the preparation of bridged, chiral metallocene catalysts of the bisindenyl type

US5391790A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

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

Key dates

• Filing date: Jun 15, 1993
• Grant date: Feb 21, 1995
• Expiry date: Jun 15, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F4/63927
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of a compound of the formula III ##STR1## comprising, deprotonating a solution or suspension of an indene of the formula I ##STR2## in a solvent or solvent mixture containing a base to give a suspension of a metallated product of the compound of formula I, adding to the suspension of the metallated product a compound of the formula II EQU X--R.sup.6 --X (II) and reacting the suspension of the metallated product and compound of the formula II.