1. 1) For reviews on iron-catalyzed and mediated organic reactions, see: (a) Iron Catalysis in Organic Chemistry, (Ed.; B. Plietker) , Wiley-VCH, Weinheim (2008)
2. (b) E. Nakamura, N. Yoshikai, J. Org. Chem., 75, 6061 (2010)
3. (c) A. Correa, O. G. Mancheño, C. Bolm, Chem. Soc. Rev., 37, 1108 (2008)
4. (d) E. B. Bauer, Curr. Org. Chem., 12, 1341 (2008)
5. (e) S. Enthaler, K. Junge, M. Beller, Angew. Chem. Int. Ed., 47, 3317 (2008)