1. EaStCHEM School of Chemistry, The University of Edinburgh, Joseph Black Building, Edinburgh EH9 3FJ, United Kingdom
2. Pharmaceutical Technology & Development, Chemical Development U.K., AstraZeneca, Silk Road, Macclesfield SK10 2NA, United Kingdom
3. Instituto de Síntesis Orgánica and Dpto. de Química Orgánica, Universidad de Alicante, Apdo. 99, 03080 Alicante, Spain