Iodoarene-Mediated α-Tosyloxylation of Ketones with MCPBA and p-Toluenesulfonic Acid
Ayumi Tanaka, Katsuhiko Moriyama, Hideo Togo*
*Graduate School of Science, Chiba University, Yayoi-cho 1-33, Inage-ku, Chiba 263-8522 Japan, Email: togofaculty.chiba-u.jp
A. Tanaka, K. Moriyama, H. Togo, Synlett, 2011, 1853-1854.
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Various ketones could be reacted into α-tosyloxy ketones in the presence of MCPBA, PTSA•H2O, catalytic amounts of iodine and tert-butylbenzene in a mixture of acetonitrile and 2,2,2-trifluoroethanol. In the reaction, 4-tert-butyl-1-iodobenzene is formed at first and then converted into the α-tosyloxylation reagent 4-tert-butyl-1-[(hydroxy)(tosyloxy)iodo]benzene by the reaction with MCPBA and PTSA•H2O.
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PhI-Catalyzed α-Tosyloxylation of Ketones with m-Chloroperbenzoic Acid and p-Toluenesulfonic Acid
Y. Yamamoto, H. Togo, Synlett, 2006, 798-800.
molecular iodine, tert-butylbenzene, hypervalent iodine compounds, Koser's Reagent, α-tosyloxy ketones, α-hydroxylation, ketones, m-chloroperbenzoic acid, p-toluenesulfonic acid, catalysts