Hashmi, A. Stephen K.; Wieteck, Marcel; Braun, Ingo; Rudolph, Matthias; Rominger, Frank Angewandte Chemie - International Edition, 2012 , vol. 51, # 42 p. 10633 - 10637 Angew. Chem., 2012 , vol. 124, # 42 p. 10785 - 10789,5