Process for the preparation of substituted indenes

Details Process for the preparation of substituted indenes Process for the preparation of substituted indenes

C - Chemistry, Metallurgy

07

C

C07C 2/86 (2006.01) C07C 13/465 (2006.01) C07C 17/26 (2006.01) C07C 25/22 (2006.01) C07D 213/16 (2006.01) C07D 307/36 (2006.01) C07D 333/08 (2006.01) C07F 7/08 (2006.01)

Patent

CA 2061295

HOE 91/F 054 Abstract of the disclosure Process for the preparation of substituted indenes The compounds of the formula I or Ia Image ( I ), Image ( Ia) in which R1 is alkyl, aryl, alkoxy, alkenyl, arylalkyl, alkylaryl, aryloxy, fluoroalkyl, halogenoaryl, alkynyl, trialkylsilyl or a heteroaromatic radical, R2, R3 and R4, in addition to hydrogen, have the meanings given under R1 and R5 is hydrogen, alkyl, fluoroalkyl or alkenyl, can be obtained in a one-stage process by reaction of a compound II Image with (substituted) cyclopentadiene in the pre- sence of a base. The compounds I and Ia are suitable as ligands for metallocene complexes which are used as catalysts in olefin polymerization.

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