Metal-mediated rearrangements rhodium

The synthesis of bicyclo[3.2.1]octadienes 86 has been accomplished by refluxing divinyl-cyclopropanes 85 in xylene. Subsequent research led to the development of conditions employing a rhodium-catalyzed step for the synthesis of bridged systems via the cyclopropanation of cyclopentadienes, furans and pyrroles (see section on transition-metal-mediated rearrangements). 

Several other examples of metal-mediated carbon skeleton rearrangements leading to cyclopropane products have been reported. " For example, the cyclopropanation of norbor-nadiene with rhodium or platinum catalysts gives cyclopropane-containing rearrangement products 12 and 13 in good yields. ... 

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