Titanocenes, the use thereof, and n-substituted pyrroles

Details Titanocenes, the use thereof, and n-substituted pyrroles Titanocenes, the use thereof, and n-substituted pyrroles

C - Chemistry, Metallurgy

07

F

260/326, 402/381

C07F 7/28 (2006.01) C07D 207/325 (2006.01) C07D 207/333 (2006.01) C07D 207/335 (2006.01) C07D 405/04 (2006.01) C07F 7/08 (2006.01) C07F 17/00 (2006.01) C08F 2/50 (2006.01) C08F 4/76 (2006.01) G03F 7/029 (2006.01) G03F 7/30 (2006.01)

Patent

CA 1337765

Titanocenes containing two 5-membered cyclodienyl groups, for example cyclopentadienyl, and one or two 6-membered carbocyclic or 5- or 6-membered heterocyclic aromatic rings which are substituted by a fluorine atom in at least one of the two ortho-positions to the titanium-carbon bond and contain, as a further substituent, unsubstituted or substituted 1-pyrryl, are suitable as photoinitiators for radiation-induced polymerization of ethylenically unsaturated compounds. The titanocenes have the formula I Image (I) in which both R1 radicals, independently of each other, are, for example, cyclopentadienyl?, idenyl? or 4,5,6,7-tetrahydroidenyl? each of which may be substituted by a substituent like C1-C18- alkyl or both R1 groups taken together may , for example, be a radical of the formula II Image (II) in which X represents (CH2)n wherein n = 1, 2 or 3, R2 may be, for example, a 6-membered carbocyclic or 5- or 6- membered heterocyclic aromatic ring substituted by fluorine in at least one of the two ortho positions to the titanium-carbon bonds and R3 may be as defined for R3 or R2 and R3 together may be -Q-Y-Q- wherein Q is a carbocyclic aromatic ring where the two bonds are in the ortho position with respect to the Y and the titanium- carbon bond and Y is a group such as -CH2-.

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