Synlett 2007(14): 2168-2172  
DOI: 10.1055/s-2007-984914
LETTER
© Georg Thieme Verlag Stuttgart · New York

Efficient Conversion of Ketones to α-Tosyloxyketones with m-Chloroperbenzoic Acid and p-Toluenesulfonic Acid in the Presence of Catalytic Amount of IL-Supported PhI in [emim]OTs

Junnosuke Akiike, Yukiharu Yamamoto, Hideo Togo*
Graduate School of Science, Chiba University, Yayoi-cho 1-33, Inage-ku, Chiba 263-8522, Japan
e-Mail: togo@faculty.chiba-u.jp;
Further Information

Publication History

Received 14 June 2007
Publication Date:
20 July 2007 (online)

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Abstract

Various ketones were smoothly converted into the corresponding α-tosyloxyketones with MCPBA and p-toluenesulfonic acid in the presence of a catalytic amount of ionic-liquid (IL)-supported PhI in room temperature ionic liquid, [emim]OTs. Moreover, the present ionic-liquid reaction media containing a catalytic amount of IL-supported PhI could be reused for the same α-tosyl­oxylation of ketones and thiazoles directly, keeping good yields.