93128-50-8Relevant academic research and scientific papers
Double Ring Closure of Diacetylenic Compounds with Activated Olefins in the Presence of a Cobalt(0) Catalyst
Zhou, Zhiming,Costa, Mirco,Chiusoli, Gian Paolo
, p. 1399 - 1406 (2007/10/02)
Ring formation from 1,6- or 1,7-diynes and activated olefins is catalysed by cobalt(0) complexes through cobaltacyclopentadiene intermediates.If steric hindrance is sufficiently low the reaction proceeds further and products containing two molecules of olefin per molecule of diyne are obtained.With terminally alkyl-substituted and conformationally rigid diynes the reaction must be carried out stoichiometrically because of the incursion of a new acid/ base-catalysed reaction, which is independent of cobalt.
SELECTIVITY CONTROL IN COBALT(0)-CATALYZED CYCLOADDITION REACTIONS
Chiusoli, Gian Paolo,Costa, Mirco,Zhou, Zhiming
, p. 441 - 449 (2007/10/02)
The chemistry of cobalt(0)-catalyzed cycloadditions, involving reaction of alkynes with other alkynes or with nitriles or with activated olefins is compared to that of cobalt(I).While the presence of a ?-ligand in cobalt(I) complexes controls the access t
