Gold(I)-Catalyzed Intermolecular [2+2] Cycloaddition of Alkynes with Alkenes
作者:Verónica López-Carrillo、Antonio M. Echavarren
DOI:10.1021/ja104177w
日期:2010.7.14
The gold(I)-catalyzedintermolecular reaction of terminal alkynes with alkenes leads to cyclobutenes. The use of sterically hindered cationic Au(I) complexes as catalysts is key for the success of this reaction.
Dissecting Anion Effects in Gold(I)-Catalyzed Intermolecular Cycloadditions
作者:Anna Homs、Carla Obradors、David Lebœuf、Antonio M. Echavarren
DOI:10.1002/adsc.201300704
日期:2014.1.13
From a series of gold complexes of the type [t‐BuXPhosAu(MeCN)]X (X=anion), the best results in intermoleculargold(I)‐catalyzed reactions are obtained with the complex with the bulky and soft anion BAr4F− [BAr4F−=3,5‐bis(trifluoromethyl)phenylborate] improving the original protocols by 10–30% yield. A kinetic study on the [2+2] cycloaddition reaction of alkynes with alkenes is consistent with an scenario