C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
C07F 17/00 (2006.01) C07F 17/02 (2006.01)
Patent
CA 2160175
A process for preparing a transition metal complex containing a disubstituted cyclopentadienyl ligand of the general formula (1) (see formula I) wherein R and R1 are the same or different, and each is a C1-C30 alkyl group, C2-C30 alkenyl group, C7-C30 alkylaryl group, C8-C30 alkenylaryl group, C3-C12 alkoxyalkyl group, C1-C30 fluoroalkyl group or a C1-C6 alkyl-tri (C1-C10 alkyl) silyl; M" is a transition metal from Group IIIB, IVB, VB, VIB or VIII of the Periodic Table of Elements; X' is Cl, Br or I; n is the oxidation state of the transition metal M"; a is ~n, and a is equal to the number of groups X' on the transition metal to be replaced the process comprising: (a) reacting a monomeric monosubstituted cyclopentadiene of the formula RC5H9, a first metallating agent and an organic halide R1X, wherein X denotes a halide, in a polyoxyalkylene polyether reaction medium, to produce an intermediate disubstituted cyclopentadiene, wherein said metallating agent is a mixture of one or more alkali metal compounds selected from the group consisting of alkali metal oxides and alkali metal hydroxides and one or more alkaline earth metal compounds selected from the group consisting of alkaline earth metal oxides and alkaline earth metal hydroxides; and (b) metallating said intermediate disubstituted cyclopentadiene produced in step (a) with a second metallating agent selected from the group consisting of Li, Na, K, NaH, KH and lithium alkyls to produce a metallated product; and (c) reacting said metallated product from step (b) with a transition metal compound containing a metal from Group IIIB, IVB, VB, VIB or VIII of the Periodic Table of Elements to produce a transition metal complex of formula (1).
Crompton Gmbh
Marks & Clerk
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