Synthesis of [3.3](1,3)Ferrocenophane and Its Derivatives

Abstract

Abstract [3.3](1,3)Ferrocenophane-1,15-diene-3,14-dione was synthesized via the base-catalyzed condensation of 1,3-ferrocenedicarbaldehyde with 1,3-diacetylferrocene utilizing the high dilution technique. The reduction of the compound with LiAlH4–AlCl3 and the subsequent catalytic hydrogenation led to the formation of [3.3](1,3)ferrocenophane. The transannular π-electronic interactions between the two ferrocene moieties in these compounds were examined on the basis of NMR and electronic spectra.