New Reactivity Modes of Chromium(0) Fischer Carbene Complexes: Unprecedented Insertion of a Carbene Ligand into an Active B−H Bond

CCα Insertion: Insertion of an Alkyne in

CCα Insertion: Insertion of an Alkyne into the CC Single Bond between the Carbene-Carbon Atom and the α-Carbon Atom of a Fischer Carbene Complex by an Unprecedented Metalla(di-π-methane) Skeletal Rearrangement

✍ Seda Ünaldi; Rudolf Aumann; Roland Fröhlich 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 292 KB 👁 1 views

## Abstract The first examples of insertion of a CC bond of an alkyne into a C~carbene~C~__α__~ single bond of a carbene complex (CC~__α__~ insertion) are reported. (__prim‐__Alkyl)carbene complexes [(OC)~5~MC(OEt)CH~2~R] (1 a–f; M=Cr, W; R=__n__Pr, C~7~H~7~, Ph) undergo CC~__α__~ insertion of