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Regiodirected Substitution of [2.2]Paracyclophanedienes and [2.2]Paracyclophanes through Tricarbonylchromium Complexation

Stöbbe, Michael ; Reiser, Oliver ; Thiemann, Thies ; Daniels, Rhys G. ; Meijere, Armin de



Abstract

4,7-dialkoxy[2.2]paracyclophanes and the corresponding 1,9-dienes are shown to undergo selective conplexation with Cr(CO)₃L₃-reagent on their less substituted benzene moiety. Lithiation/silytion of these complexes leads to arene- or bridge-substitution, respectively. An analagous behaviour is observed for the tricarbonylchromium[2.2]paracyclophane and its 1,9-diene.


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