Synthesis 2004(2): 202-204  
DOI: 10.1055/s-2003-44371
SHORTPAPER
© Georg Thieme Verlag Stuttgart · New York

Oxidative Synthesis of α,β-Unsaturated Ketone from α-Iodo Ketone Using Peracid

C. Akira Horiuchi*a, Shun-Jun Jib, Masatoshi Matsushitaa, Wen Chaia
a Department of Chemistry, Rikkyo (St. Paul’s) University, Nishi-Ikebukuro, Toshima-Ku, Tokyo 171-8501, Japan
Fax: +81(3)39852397; e-Mail: horiuchi@rikkyo.ac.jp;
b Department of Chemistry and Chemical Engineering, Suzhou University, 1 Shizi St. Suzhou, Jiangsu 215006, P. R. China
Further Information

Publication History

Received 29 August 2003
Publication Date:
09 December 2003 (online)

Abstract

Oxidation of α-iodo ketone in CH2Cl2 using m-chloro­perbenzoic acid yields α,β-unsaturated ketone by β-H elimination in good yield. This reaction affords a new and convenient synthetic method for α,β-unsaturated ketone from α-iodo ketone.

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The starting material α-iodo cyclic ketones used in our experiments were prepared according to the literature procedures. [11] The physical data of typical compound 3,4-dihydro-2-iodo-1(2H)-naphthalenone (9) is listed.
Colorless needles; mp 78.5-79.6 °C.
IR (KBr): 1672, 1593 cm-1.
1H NMR (CDCl3): δ = 5.02 (t, J = 3.7 Hz, 1 H, C2), 7.31 (m, 2 H), 7.51 (m, 1 H), 8.09 (d, J = 7.7 Hz, 1 H).
13C NMR (CDCl3): δ = 27.8, 30.7, 32.7, 127.0, 128.7, 128.8, 129.4, 134.0, 142.8, 191.8.
HRMS: m/z calcd for C10H9OI [M]: 271.9699; found: 271.9734.