Support group: Coordinated to the tricarbonylchromium fragment, a typically unstable benzylic organolithium can participate directly in cross‐coupling reactions with aryl bromides to form polyarylated methane derivatives (see scheme). Cr(CO)3 assistance leads to reactivity with a variety of coordinated substrates and—given multiple benzylic sites—can effect up to six coupling events per arene.
Hilfsgruppe: Im Komplex mit dem Tricarbonylchrom‐Fragment gehen typischerweise instabile Benzyllithium‐Reagentien direkt Kreuzkupplungen mit Arylbromiden unter Bildung von Polyarylmethanen ein (siehe Schema). Die Cr(CO)3‐Gruppe macht viele koordinierte Substrate reaktiv und ermöglicht – je nach der Zahl vorhandener Benzylpositionen – bis zu sechs Kupplungsereignisse pro Aren. TMS=Trimethylsilyl.
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