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    Université de Fribourg

    Aus Pinen abgeleitete Eisencarbonylkomplexe und ihre Anwendung in der Naturstoffsynthese

    Huber, Veronika ; Jenny, Titus (Dir.)

    Thèse de doctorat : Université de Fribourg, 2000 ; Nr. 1317.

    (-)-β-pinene is an important and cheap precursor of natural products because of its frequent natural occurrence in high enantiopurity of about 95%. Ring opening complexation of (—)-β-pinene leads to the so called seco-pinene complex which can be isomerised to a diene or an iso-seco-pinene complex in the presence of a protic or a Lewis acid. In the present work the reactivity of these pinene...

    Université de Fribourg

    Entwicklung neuer homogener Eisenhydrierkatalysatoren mit Diazadien- oder Diazatrienliganden

    Sieber, Thomas Peter ; Jenny, Titus (Dir.) ; Süss-Fink, Georg (Codir.)

    Thèse de doctorat : Université de Fribourg, 1999 ; Nr. 1279.

    A new homogeneous iron hydrogenation catalyst system was developed. This new system allows o hydrogenate mono-, di-, and trisubstituted olefins at low hydrogen pressure. Conjugated diimines contained in 1,4-diazadiene (DAT) or 2,5-diazatriene (DAT) systems were found to be most appropriate ligands for iron in this case. The behaviour of various types of ligands with respect to reactvity and...