ChemInform Abstract: Mild Niobium‐Catalyzed [2 + 2 + 2] Cycloaddition of Sila‐Triynes: Easy Access to Polysubstituted Benzosilacyclobutenes. Issue 27 (18th June 2015) - Simon, Cedric; Amatore, Muriel; Aubert, Corinne; Petit, Marc