87226-82-2Relevant academic research and scientific papers
Transannular [4 + 2] Cycloaddition Reactions of Cobalt-Complexed Macrocyclic Dienynes
Karabiyikoglu, Sedef,Merlic, Craig A.
supporting information, p. 4086 - 4089 (2015/09/01)
The first transannular [4 + 2] cycloaddition reactions of macrocyclic dicobalt hexacarbonyl-dienyne complexes were demonstrated. Complexes were conveniently prepared through palladium(II)-catalyzed intramolecular oxidative cyclization of bis(vinylboronate esters) followed by complexation with dicobalt octacarbonyl. Transannular [4 + 2] cycloaddition reactions of the complexes occurred at lower temperatures and shorter times than transannular Diels-Alder reactions of metal-free dienynes. Intermolecular control reactions confirmed the effect of cobalt complexation on [4 + 2] cycloaddition reactions of unactivated alkynes and dienes.
An efficient cobalt catalyst for the neutral Diels-Alder reaction of acyclic 1,3-dienes with internal alkynes
Hilt, Gerhard,Korn, Tobias J.
, p. 2783 - 2785 (2007/10/03)
The efficiently cobalt(I)-catalysed neutral Diels-Alder type reactions of internal alkynes with substituted 1,3-dienes is described. The regiochemistry for the dihydroaromatic products of reactions of isoprene with unsymmetrical reaction partners (2-alkyn
