From ynamides to highly substituted benzo[b]​furans: gold(I)​-​catalyzed 5-​endo-​dig-​cyclization​/rearrangement of alkylic oxonium intermediates - Blanco Jaimes, Maria Camila; Claus, Vanessa; Rominger, Frank; Hashmi, A. Stephen K. (Chemistry - a European journal, 2013)