1. Departamento de Química, Universidade Federal de São Carlos, CP 676, São Carlos, CEP 13565-905 São Paulo, Brazil
2. Dipartimento di Chimica “Giacomo Ciamician”, Alma Mater Studiorum - Università di Bologna, Via Selmi 2, 40126 Bologna, Italy
3. Institute for Organic Synthesis and Photoreactivity (ISOF), National Research Council of Italy (CNR), Via P. Gobetti 101, I-40129 Bologna, Italy