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Palladium im angeregten Zustand katalysiert die stereoselektive decarboxylierende Alkylierung α,β‐ungesättigter Säuren, wie M. Rueping, L. Cavallo et al. in ihrer Zuschrift auf S. 3450 schildern. Die oxidative Addition von Alkylbromid an Pd0 im Grundzustand ist ein Prozess mit hoher Energiebarriere, weshalb die Reaktion ohne Licht nicht ablaufen kann (dunkle Seite im Bild). Pd0 im Triplettzustand,...
Visible‐light induced, palladium catalyzed alkylations of α,β‐unsaturated acids with unactivated alkyl bromides are described. A variety of primary, secondary, and tertiary alkyl bromides are activated by the photoexcited palladium metal catalyst to provide a series of olefins at room temperature under mild reaction conditions. Mechanistic investigations and density functional theory (DFT) studies...
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