Process for the preparation of titanocenes containing O,O'-diflu

Details Process for the preparation of titanocenes containing O,O'-diflu Process for the preparation of titanocenes containing O,O'-diflu

1990-05-23

1991-12-24

Niebling, John

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

Organic compounds

Heavy metal containing

556 56, 430281, C07F 1700

Patent

active

050754670

ABSTRACT:
An improved preparation of titanocenes of the formula I ##STR1## in which R.sub.1 is cyclopentadienyl.sup..crclbar., indenyl.sup..crclbar. or 4,5,6,7-tetrahydroindenyl.sup..crclbar., each of which is unsubstituted or monosubstituted or polysubstituted by C.sub.1 -C.sub.18 alkyl, C.sub.1 -C.sub.18 alkoxy, C.sub.2 -C.sub.18 alkenyl, C.sub.5 -C.sub.8 cycloalkyl, C.sub.6 -C.sub.10 aryl, C.sub.7 -C.sub.16 aralkyl, --Si(R.sub.3).sub.4, --Ge(R.sub.3).sub.4 or halogen, or the two R.sub.1 radicals together are a divalent radical of the formula II ##STR2## in which Z is --(CH.sub.2).sub.m -- where m=1, 2 or 3, unsubstituted or phenyl-substituted C.sub.2 -C.sub.12 alkylidene, --Si(R.sub.3).sub.2 -- or --Si(R.sub.3).sub.2 --O--Si(R.sub.3).sub.2 --, and R.sub.3 is C.sub.1 -C.sub.12 alkyl or C.sub.6 -C.sub.10 aryl, and R.sub.2 is six-membered carbocyclic aromatic ring which is substituted by fluorine in both the ortho-positions to the Ti-C bond and which may also have further substituents, involves the addition of certain lithium amides to a mixture of (R.sub.1).sub.2 TiX.sub.2 (X=halogen) and HR.sub.2 at -30.degree. C. to +25.degree. C.

REFERENCES:
patent: 4590287 (1986-05-01), Riediker et al.
patent: 4910121 (1990-03-01), Riediker et al.
patent: 4970136 (1990-09-01), Riediker et al.
Journal of Organic Chemistry, 46, pp. 313-321 (1972).
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