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J. Christoffers, T. Werner, S. Unger, and W. Frey, “Preparation of Acyloins by Cerium-Catalyzed, Direct Hydroxylation of ;2-Dicarbonyl Compounds with Molecular Oxygen,”10.1002/ejoc.200390075__European Journal of Organic Chemistry, vol. 2003, no. 3, pp. 425–431, 2004, doi:10.1002/ejoc.200390075 .
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M. Rössle, T. Werner, A. Baro, W. Frey, and J. Christoffers, “Formation of 1,4-Diketones by Aerobic Oxidative CøffC Coupling of Styrene with 1,3-Dicarbonyl Compounds,”10.1002/anie.200461406__Angewandte Chemie International Edition, vol. 43, no. 47, pp. 6547–6549, 2004, doi:10.1002/anie.200461406 .
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J. Christoffers, T. Werner, A. Baro, and P. Fischer, “Synthesis of a tin-functionalized cyclopentadiene derivative,”10.1016/j.jorganchem.2004.06.065__Journal of Organometallic Chemistry, vol. 689, no. 22, pp. 3550–3555, 2004, doi:10.1016/j.jorganchem.2004.06.065 .
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J. Christoffers, T. Werner, W. Frey, and A. Baro, “Straightforward Synthesis of (R)-()-Kjellmanianone,”10.1002/chem.200305486__Chemistry - A European Journal, vol. 10, no. 4, pp. 1042–1045, 2004, doi:10.1002/chem.200305486 .
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