Indolophanetetrayne cobalt complexes via Nicholas reactions.
[reaction: see text] Indole N-substituted diyne tetracobalt complexes (4) undergo a Lewis acid mediated dimerization-cyclization reaction through the indole 3-position to afford indolophanetetrayne cobalt complexes (7). Substitution of the indole fragment of (4) with a 3-methyl function allows analogous formation of indolophanetetrayne complex (9), linked through the indole 2-position.
Gibe
Romelo
R
Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON, N9B 3P4, Canada.
Green
James R
JR
Davidson
Greg
G