| Abstract
| - The half-sandwich metallocene η5-(C5Me4)SiMe2N(tBu)TiCl2 reacts with a stoichiometricamount of dibutylmagnesium in tetrahydrofuran to form a robust monobutyl monochlorideη5-(C5Me4)SiMe2N(tBu)Ti(Bu)Cl. X-ray crystallography reveals an undistorted η1-butyl ligand.In the presence of an excess of triethylaluminum the dichloride η5-(C5Me4)SiMe2N(tBu)TiCl2 serves as a catalyst for the carboalumination of olefins. The organometallic productsof these reactions can be oxidized to 1,4-butanediols. The enantioselective carboaluminationof allylbenzene by the chiral complex η5-(Ind)SiMe2N[CH(Me)Ph]TiCl2, derived from (−)α-methylbenzylamine, affords 2-benzyl-1,4-butanediol in 53% yield and 28% enantiomericexcess.
- Alkylation of the metallocene η5-(C5Me4)SiMe2N(tBu)TiCl2 with dibutylmagnesium yields a robust monobutyl monochloride η5-(C5Me4)SiMe2N(tBu)Ti(Bu)Cl. X-ray crystallography reveals an undistorted η1-butyl ligand. In the presence of an excess of triethylaluminum the dichloride η5-(C5Me4)SiMe2N(tBu)TiCl2 serves as a catalyst for the carboalumination of olefins.
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