Role of σ,π-Digold(I) Alkyne Complexes
in Reactions of Enynes
Sofia Ferrer
Antonio M. Echavarren
10.1021/acs.organomet.7b00668.s001
https://acs.figshare.com/articles/journal_contribution/Role_of_-Digold_I_Alkyne_Complexes_in_Reactions_of_Enynes/5716255
Gold(I)
acetylide and σ,π-digold(I) alkyne complexes
derived from one prototypical 1,6-enyne and from 7-ethynyl-1,3,5-cycloheptatriene
have been prepared and structurally characterized. Their possible
role in gold(I)-catalyzed cycloisomerizations has been studied by
experiment and by DFT calculations. Gold(I) acetylides are totally
unproductive complexes in the absence of Brønsted acids. Similarly,
no cyclizations were observed by heating σ,π-digold(I)
alkyne digold(I) at least up to 130 °C. Theoretical studies provide
a rationale for the much lower reactivity of digold species in reactions
of enynes.
2017-12-19 16:19:06
enyne
Br ønsted acids
complex
digold species
DFT calculations
Theoretical studies
alkyne
acetylide