Abstract
2,9-Dilithio-1,4,6,9-decatetraenes, generated from the corresponding dibromo-decatetraenes, were reacted with acyl halides or carboxylic esters to give nine-membered carbocycles. The decatetraene precursors were readily prepared from zirconacyclopentadienes and 2,3-dibromopropene in the presence of a catalytic amount of CuCl.
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