Reaction of vinyllithium reagents generated from vinylstannanes [(E)-RCH![[double bond, length half m-dash]](https://www.rsc.org/images/entities/char_e006.gif)
CHSnBu3(R = Ph, SiPh3, SiMe3, n-C5H11), 1a–d] with [Fe(CO)4L](L = CO, PPh3) followed by an ethyl trifluoromethanesulfonate quench gives vinylketene complexes [Fe0(CO)2L{RCHCHC(OEt)CO}] 2a–f, in a one-pot reaction sequence in 31–55% yield.
S. E. Gibson (née Thomas), M. F. Ward, M. Kipps, P. D. Stanley and P. A. Worthington, Chem. Commun., 1996, 263 DOI: 10.1039/CC9960000263
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