Coupling reactions of 2-substituted, 7-haloindenes with aryl...

Details Coupling reactions of 2-substituted, 7-haloindenes with aryl... Coupling reactions of 2-substituted, 7-haloindenes with aryl...

1998-08-03

2002-10-15

Killos, Paul J. (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

C560S081000, C560S083000, C562S489000, C562S496000, C562S862000, C568S808000

Reexamination Certificate

active

06465700

ABSTRACT:

FIELD OF THE INVENTION
This invention relates to 2-substituted 7-haloindenes useful in coupling reactions to produce a wide variety of metallocene olefin polymerization catalyst intermediates and to metallocene catalysts derived from such intermediates.
BACKGROUND OF THE INVENTION
Metallocenes which comprise indene systems are well known &agr;-olefin polymerization catalysts. Substitution patterns in such indene systems significantly influence poly-&agr;-olefin properties, including tacticity and molecular weight.
Spaleck, et al., Organometallics (1994) 13:954-963 describes bridged zirconocene catalysts including indene systems illustrated by Compound 4 of “Scheme 1” (p. 955) which yield highly isotactic polypropylene when used with methylaluminoxane as a cocatalyst. As shown by “Scheme 2”, Compound 10, Spaleck's synthesis requires an expensive 2-(bromomethyl) biphenyl starting material.
This invention provides a more cost effective synthesis of metallocene catalysts which comprise indene systems.


REFERENCES:
patent: 94/08954 (1994-04-01), None
Chem. Abst. 106: 120966 1986.

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