748802-57-5Relevant academic research and scientific papers
The reaction of diazocyclopentadienyl compounds with cyclomanganated arenes as a route to ligand-appended cymantrenes
Djukic, Jean-Pierre,Michon, Christophe,Heiser, Dirk,Kyritsakas-Gruber, Nathalie,De Cian, Andre,Doetz, Karl Heinz,Pfeffer, Michel
, p. 2107 - 2122 (2004)
The thermolysis of various cyclomanganated arenes in the presence of 5-diazocyclopentadiene, 7-diazoindene or 9-diazofluorene afforded the corresponding arenes tethered with cymantrenyl, benzocymantrenyl or dibenzocymantrenyl groups in fair to good yields. This reaction implies a multi-facetted mechanism that consists of three steps: the insertion of an alkylidene moiety into a C-Mn bond, a CAr-C bond formation and several haptotropic ring-slippages. The coupling reaction has proven to be particularly efficient with Mn(CO)4 chelates derived from acetylarenes and nitrogen-containing heterocycles. In one case of a 2-phenyl-2-oxazoline complex, the coupling with 9-diazofluorene yields a new η1-dibenzocymantrene complex in which the Mn(CO)4 moiety is chelated and is part of a six-membered metallacycle. The results of this study are mainly supported by the molecular structures of nine new complexes obtained by X-ray diffraction analyses. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.
