alkyne complexes, boron, carbocation, coupling, Lewis acids, alkynes, enynes
The Lewis acid mediated Nicholas reaction of potassium alkynyltrifluoroborates and propargyl acetate- hexacarbonyldicobalt complexes affords 1,4-diyne dicobalt hexacarbonyl complexes in good yields. The analogous Nicholas reactions of potassium alkenyltrifluoroborates give 1,3-enyne dicobalt hexacarbonyl complexes in most cases, although the initial site of reaction can vary. Potassium vinyltrifluoroborate itself affords alkynylcyclopropane complexes.
Funding Reference Number
NSERC (Canada) Discovery Grants porgramme (RGPIN-2016-04946)
St. Onge, Brent and Green, James R.. (2017). Nicholas Reactions of Alkynyl- and Alkenyltrifluoroborates. Synlett, 28.