CYCLOADDITIONSREAKTIONEN VON ORGANOMETALLKOMPLEXEN VIII*. VINYLIDEN-METALLKOMPLEXE ALS BAUSTEINE FUER NEURATIGE FUENFGLIEDRIGE METALLA-HETEROCYCLEN

Article abstract of DOI:10.1016/0022-328X(86)84046-3

Vinylidenemetal complexes such as C5H5Rh(=C=CHR)(PPr3ⁱ) (Ia,Ib) and C6H6Os(=C=CHPh)(PPr3ⁱ) (III) react with benzoylazide to form nearly quantitatively five-membered metalla heterocycles IIa, IIb and IV containing a MCNCO ring with an exocyclic C=C double bond.For M = Os, both Z- and E-isomers can be obtained.Protonation at the nitrogen atom of IIb leads to a cationic species for which also Z- and E-isomers can be observed.