Coinage Metals-Catalyzed Cascade Reactions of Aryl Alkynylaziridines: Silver(I)-Single vs Gold(I)-Double Cyclizations Nicolas Kern, Aurélien Blanc*, Solène Miaskiewicz, Michelle Robinette, Jean-Marc Weibel and Patrick Pale* Laboratoire de Synthèse et Réactivité Organiques, Institut de Chimie, CNRS et Université de Strasbourg, 4 rue Blaise Pascal, 67070 Strasbourg France Supporting Information Proton and Carbon NMR Spectra S2 Figure 2. 1 H NMR Spectra of the transient intermediates 3a in gold(I)catalyzed formation of spiro[isochroman-4,2-pyrroline] 2a S157 X-ray structure and crystallographic data for 2h-maj S158  1