1. Laboratory for Sustainable Organic Synthesis and Catalysis Department of Chemistry Federal University of São Carlos – UFSCar 13565-905 Carlos São Paulo Brazil
2. Institut für Organische Chemie Universität Regensburg Universitätsstrasse 31 93053 Regensburg Germany
3. Current address: Department of Chemistry Technical University of Denmark DK-2800 Kgs. Lyngby Denmark