Abstract

Katalytische Mengen günstiger Eisen(III)-Salze lassen bei der Reaktion von 3-Pentinylethern mit Butyllithium bei −20°C in Toluol die (E)-4-Methyl-3-octenylether in hohen Ausbeuten und ohne die sonst zu erwartenden Nebenreaktionen entstehen. Eine anschließende Addition von Elektrophilen (E+, siehe Schema; acac = Acetylacetonat) liefert stereochemisch definierte tetrasubstituierte Alkene.

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