Hydrophenoxylation of Alkynes by Cooperative Gold Catalysis
作者:Yoshihiro Oonishi、Adrián Gómez-Suárez、Anthony R. Martin、Steven P. Nolan
DOI:10.1002/anie.201304182
日期:2013.9.9
Double impact: The title method gives aryl vinylethers in high yields, short reaction times, Z‐stereospecificity, and good regioselectivities. Insights into the reaction mechanism highlight the role of [Au(NHC)}2(μ‐OH)][BF4] (NHC=N‐heterocyclic carbene) as both a Lewis acid, [Au(NHC)][BF4], and a Brønsted base, [Au(NHC)(OH)], thereby generating a synergistic effect between the two gold moieties.
Scope and limitations of the dual-gold-catalysed hydrophenoxylation of alkynes
作者:Adrián Gómez-Suárez、Yoshihiro Oonishi、Anthony R Martin、Steven P Nolan
DOI:10.3762/bjoc.12.19
日期:——
able to use highly steric hindered phenols, small changes on the steric bulk of the alkynes have a dramatic effect on the reactivity. More importantly, we have observed that the use of substrates that facilitate the formation of diaurated species such as gem-diaurated or sigma,pi-digold-acetylide species, hinder the catalytic activity. Moreover, we have identified that the use of directing groups in