Tetrahedron Letters p. 6493 - 6496 (1987)
Update date:2022-08-11
Topics:
Heisteeg, B. J. van de
Schat, G.
Akkerman, O. S.
Bickelhaupt, F.
The Tebbe-type reagent Cp2Ti(X)CH2MgX (X=Br, Cl) (2) in diethyl ether/benzene gave, on evaporation of the solvent and solution in toluene, Cp2(Br)TiCH2MgCH2Ti(Br)Cp2 (3).Both compounds differ dramatically in their spectral properties and reactivities.Compound 3 reacts with ethers to give Cp2TiCH2Ti(Cp2)CH2 (4), with PMe3 to give Cp2(MeP3)Ti=CH2 (5) and with benzophenone to give 1,1-diphenylethene.Analogous derivatives were obtained from Cp'2TiCl2 (Cp'=MeC5H4).
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