1. Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007 Tarragona, Spain
2. Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
3. Department of Organic Chemistry I, Universidad País Vasco, UPV/EHU, Apdo. 1072, 20080 San Sebastian, Spain
4. The University of Manchester, School of Chemistry, Oxford Road, M13 9PL Manchester, U.K.
5. ICREA, Passeig Lluïs Companys, 23, 08010 Barcelona, Spain