Efficient Cycloisomerization of Propargyl Amides by Electrophilic Gold(I) Complexes of KITPHOS Monophosphines: A Comparative Study
作者:Simon Doherty、Julian G. Knight、A. Stephen K. Hashmi、Catherine H. Smyth、Nicholas A. B. Ward、Katharine J. Robson、Sophie Tweedley、Ross W. Harrington、William Clegg
DOI:10.1021/om1006769
日期:2010.9.27
Electrophilic gold(I) complexes of diphenyl- and dicyclohexylphosphino-based KITPHOSmonophosphines catalyze the 5-exo-dig cycloisomerization of a range of propargyl amides to afford the corresponding alkylidene oxazolines; in all cases catalysts formed from diphenylphosphino-substituted KITPHOSmonophosphines outperformed their dicyclohexylphosphino counterparts as well as that based on triphenylphosphine