Hochreaktives Titan auf Graphit. Ein universelles Reduktionsmittel zur Alkenkupplung von Carbonylverbindungen

Highly Reactive Titanium on Graphite. A Universal Reducing Agent for the Coupling of Carbonyl Compounds to Alkenes Finely dispersed titanium on graphite, prepared from titanium trichloride and lamellar potassium-graphite, is a highly reactive and universally applicable McMurry reagent, which efficiently couples aryl and alkyl carbonyl und dicarbonyl compounds to alkenes and cycloalkenes, respectively. The closely related reagent derived from titanium tetrachloride distinguishes between aromatic and aliphatic educts, the latter of which stop at the pinacol stage. Thus, use of the appropriate reagent allows McMurry as well as pinacol reductions of aliphatic carbonyl compounds.