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Mittelgroße Ringe In der Zuschrift auf S. 146 ff. zeigen B. de Bruin et al., dass ein Cobalt(II)‐Komplex die Synthese einer Reihe von Dibenzocyclooctenen durch Metalloradikal‐Aktivierung von ortho‐Benzallylaryl‐N‐tosylhydrazonen katalysiert.
The metalloradical activation of ortho‐benzallylaryl N‐tosyl hydrazones with [Co(TPP)] (TPP=tetraphenylporphyrin) as the catalyst enabled the controlled exploitation of the single‐electron reactivity of the redox non‐innocent carbene intermediate. This method offers a novel route to prepare eight‐membered rings, using base metal catalysis to construct a series of unique dibenzocyclooctenes through...
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