Skeletal rearrangement of α-substituted organometallic compounds to give β-substituted compounds by carbon-carbon bond activation was performed with bis(η5-cyclopentadienyl)-2,5-dimethyl-zircons- or -hafna-cyclopentane, which were regio- and stereo-selectively converted into the corresponding 3,4-dimethylmetallacyclopentanes in high yield.
T. Takahashi, T. Fujimori, T. Seki, M. Saburi, Y. Uchida, C. J. Rousset and E. Negishi, J. Chem. Soc., Chem. Commun., 1990, 182 DOI: 10.1039/C39900000182
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