Generation of 1,1′-Diethynylferrocene for Practical Use: One-Pot Synthesis of 1,1′-Bis(Diacetylene)–Connected Ferrocene Derivative

1,1′-Diethynylferrocene was readily generated for practical use from the trimethylsilyl-protected precursor under modified Eglinton conditions. An oxidative coupling reaction of this reactive species with phenylacetylene successively took place to afford the corresponding 1,1′-bis(diacetylene) connected ferrocene derivative.