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The Effect of Open and Closed Structures of Titanocenes on the Control of Diastereoselectivity of Radical Reactions

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journal contribution
posted on 01.03.2004, 00:00 by Andreas Gansäuer, Björn Rinker, Andriy Barchuk, Martin Nieger
A comparison of the X-ray structures of dichlorobis{(1-methylcyclohexyl)-η5-cyclopentadienyl}titanium (1) and dichlorobis{(1-butyl-1-methylbutyl)-η5-cyclopentadienyl}titanium (2), containing tertiary alkyl substituents, and the known complex dichlorobis(cyclohexyl-η5-cyclopentadienyl)titanium (3), with two cyclohexyl substituents, has been carried out. The structural features are of relevance for the understanding of activity and selectivity of these complexes in diastereoselective additions of acrylates to β-titanoxy radicals and for the design of novel catalysts.