title: [3+2+1] cycloaddition involving alkynes, CO and bridging vinyliminium ligands in diiron complexes: a dinuclear version of the Dötz reaction?
abstract: The vinyliminium complex [Fe2{mu-eta(1):eta(3)-C(SiMe3)=CHC=N(Me)2}(mu-CO)(CO)(Cp)2][SO3CF3] reacts with HC[triple bond]CR (R = CPh2OH), affording a mixture of the 2,4,6-trisubstituted oxo-eta(5)-cyclohexadienyl complex [Fe{eta(5)-C6H2O(NMe2)(SiMe3)(R)}(Cp)], the 2,6-disubstituted phenol C6H3R(NMe2)OH (R = CHPh2) and 1,2,4-trisubstituted ferrocene [1-NMe2-2-R-4-SiMe3-Fc]. The corresponding reaction with HC[triple bond]CR (R = CMe2OH) yields analogous products: [Fe{eta(5)-C6H2O(NMe2)(SiMe3)(R')}(Cp)] (R' = CMe=CH2), the phenol C6H3R'(NMe2)OH together with [1-NMe2-2-R-4-SiMe3-Fc].
authors.affiliation: Dipartimento di Chimica Fisica e Inorganica, Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy.
authors.forename: Luigi
authors.initials: L
authors.lastname: Busetto
authors.forename: Fabio
authors.initials: F
authors.lastname: Marchetti
authors.forename: Rita
authors.initials: R
authors.lastname: Mazzoni
authors.forename: Mauro
authors.initials: M
authors.lastname: Salmi
authors.forename: Stefano
authors.initials: S
authors.lastname: Zacchini
authors.forename: Valerio
authors.initials: V
authors.lastname: Zanotti
mesh_terms: D000480:Alkynes / Q000737:chemistry*; D002248:Carbon Monoxide / Q000737:chemistry*; D018360:Crystallography, X-Ray; D003500:Cyclization; D005296:Ferrous Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D008024:Ligands; D008958:Models, Molecular; D015394:Molecular Structure
chemical_list: D000480:Alkynes; D005296:Ferrous Compounds; D008024:Ligands; D002248:Carbon Monoxide