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In the presence of catalytic [Ru(p‐cym)I2]2 and the base guanidine carbonate, benzoic acids react with internal alkynes to give the corresponding 2‐vinylbenzoic acids. This alkyne hydroarylation is generally applicable to diversely substituted electron‐rich and electron‐poor benzoic and acrylic acids. Aryl(alkyl)acetylenes react regioselectively with formation of the alkyl‐branched hydroarylation...
Eine rein, eine raus: In der Gegenwart eines Kupfer/Silber‐Katalysatorsystems erfahren aromatische Carboxylatsalze eine ortho‐C‐H‐Alkoxylierung mit gekoppeltem Verlust der carboxylatdirigierenden Gruppe in einem protodecarboxylierenden Schritt (siehe Schema; FG=funktionelle Gruppe). Dieser Prozess eröffnet einen vorteilhaften Zugang zur wichtigen Substanzklasse der aromatischen Ether ausgehend von...
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