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A cross‐hydroalkenylation/rearrangement cascade (HARC), using a cyclopropene and alkyne as substrate pairs, was achieved for the first time by using new [(NHC)Ni(allyl)]BArF catalysts (NHC=N‐heterocyclic carbenes). By controlling the (NHC)NiIIH relative insertion reactivity with cyclopropene and alkyne, a broad scope of cyclopentadienes was obtained with highly selectively. The structural features...
Eine Hydroalkenylierungs/Umlagerungs‐Kaskade (HARC) mit Cyclopropen‐ und Alkinsubstraten wurde mithilfe von NHC‐Ni‐Katalysatoren realisiert. Wie C.‐Y. Ho und J.‐Q Huang in ihrer Zuschrift auf S. 5758 berichten, bietet dieses Verfahren eine neue, nachhaltige Route zu funktionalisierten Cyclopentadienen aus vielfältigen Cyclopropenen und Alkinen unter milden Bedingungen. Der Katalysator “greift sich”...
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