title: Rapid Sonogashira cross-coupling of iodoferrocenes and the unexpected cyclo-oligomerization of 4-ethynylphenylthioacetate.
abstract: A systematic study into the Sonogashira cross-coupling of 1,1'-diiodoferrocene (fcI2) confirms that the Pd(0)-P((t)Bu)3 system provides a remarkable rate increase over Pd(0)-(PPh3)2. Attempts to couple 4-ethynylphenylthioacetate (2) with fcI2 instead produced a novel cyclic trimer of the former, from syn addition of S-Ac across C≡C.
authors.affiliation: Department of Chemistry, Imperial College London, London, SW7 2AZ, UK.
authors.forename: Michael S
authors.initials: MS
authors.lastname: Inkpen
authors.forename: Andrew J P
authors.initials: AJ
authors.lastname: White
authors.forename: Tim
authors.initials: T
authors.lastname: Albrecht
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Long