1. Department of ChemistryUniversity of Helsinki A. I. Virtasen aukio 1, P.O. Box 55 00014 Helsinki Finland
2. Current address: Institute of Organic ChemistryJohannes Gutenberg-University Mainz Duesbergweg 10–14 55128 Mainz Germany
3. Department of Chemical and Pharmaceutical SciencesUniversity of Trieste Via L. Giorgieri 1 34127 Trieste Italy
4. Department of Chemistry and Materials ScienceAalto University, P.O Box 16100 00076 Aalto Finland
5. Research Unit of Sustainable ChemistryFaculty of TechnologyUniversity of Oulu 90014 Oulu Finland