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Synlett 1998; 1998(10): 1075-1076
DOI: 10.1055/s-1998-1897
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New Method for the Preparation of an Active Manganese Species and its Use for Radical Cyclization Reactions

Jun Tang* , Hiroshi Shinokubo, Koichiro Oshima
  • *Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Sakyo-ku, Yoshida, Kyoto 606-8501, Japan; Fax + 81-75-761-8846; E-mail: oshima@fm1.kuic.kyoto-u.ac.jp
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Publication History

Publication Date:
31 December 2000 (online)

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Reduction of Li2MnCl4 with magnesium in THF afforded a fairly active manganese species which readily initiated radical cyclization of 2-iodoethanal allylic acetals at room temperature. The corresponding 2-bromoethanal acetals also provided the same cyclized products upon treatment with the activated manganese reagent at reflux in THF.

active metallic manganese - radical cyclization - acetal - reduction

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