Abstract

The ene–diyne systems 1 and 2 possessing ferrocenyl groups at the periphery were prepared by the simple one-pot Sonogashira–Hagihara coupling reaction of ethynylferrocene with 9-dibromomethylene-9 H-fluorene ( 4) and 9,10-bis(dibromomethylene)-9,10-dihydroanthracene ( 5). The novel ferrocene-substituted ene–diyne compounds exhibited amphoteric redox behavior with a reversible one-stage electrochemical oxidation upon cyclic voltammetry.

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