· Examples:
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A. G. Myers, P. S. Dragovich, J. Am. Chem. Soc. 1992, 114, 5859. |
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D. A. Evans, J. r. Gage, J. L. Leighton, J. Am. Chem. Soc. 1992, 114, 9434. |
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M. Mori, T. Tomita, Y. Kita, Tetrahedron Lett. 2004, 45, 4397. |
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Y.-F. Lu, A. G. Fallis, Tetrahedron Lett. 1993, 34, 3367. |
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P. A. Wender, S. G. Hegde, R. D. Hubbard, L. Zhang, J. Am. Chem. Soc. 2002, 124, 4956. |
1.9.2 2,2,6,6-Tetramethylpiperidin-1-oxyl (TEMPO)
TEMPO is organic heterocyclic compound bearing a radical oxygen atom. This compound was prepared by Lebedev and Kazarnowskii in 1960 from the oxidation of 2,2,6,6-tetramethylpiperidine. In conjunction with other oxidizing agents, this reagent provides mild conditions for oxidations.
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TEMPO |
F. Montanari, S. Quici, Encyclopedia Reagents for Organic Synthesis, John Wiley and Sons, Inc., L. A. Paquette, Ed., New York, 1995, 7, 4821. |