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Facile Syntheses of Trovacene, the Formation of [n]Boratrovacenophanes (n = 1, 2), and Their Reactivity toward [Pt(PEt3)4]

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posted on 11.09.2006, 00:00 by Holger Braunschweig, Matthias Lutz, Krzysztof Radacki, Anu Schaumlöffel, Fabian Seeler, Christian Unkelbach
Trovacene (1) was prepared by two novel procedures, employing readily available vanadium precursors and after dimetalation converted into the [2]boratrovacenophane 2 and the [1]boratrovacenophane 4. The reactivity of the boron−boron bond in 2 toward [Pt(PEt3)4] was studied and afforded the oxidative addition product 3. X-ray crystallographic studies on 24 revealed mutual tiltings of the carbocyclic rings of 11.4, 4.98, and 28.23°, respectively.