Rhodium-Promoted Linear Tetramerization and Cyclization of 3,3-Dimethylbut-l-yne.
With tetrahydrofuran as the solvent [Rh(thf)(2)(cod)](+) promotes the selective coupling of tBuC(2)H to form triene-yne 1; at high alkyne concentrations, however, an unusual C-H activation process intervenes, leading to the formation of complex 2, which contains two linked five-membered rings. cod=1,5-cyclooctadiene.
Burrows
AD
Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY (UK).
Green
M
Jeffery
JC
Lynam
JM
Mahon
MF